{
  "meta": {
    "title": "Sixty Years After Wainwright: What Climate Change Has Done to the Lake District Fells",
    "short_title": "Lake District Climate Report",
    "description": "A fully-sourced dataset on how the climate of the Lake District has changed since Wainwright wrote his Pictorial Guides (1955-1966), and what is projected. Long-run temperature, rainfall and air-frost come from the Met Office HadUK-Grid areal series for the England NW & N Wales district - the tightest official region that contains the Lake District. Records, attribution, impacts and projections are attributed to their publishers. Every figure carries a value, a period, a basis, a baseline where relevant, a confidence and a source.",
    "geography_focus": "Lake District National Park / Cumbria",
    "climate_basis": "Met Office HadUK-Grid areal series, England NW & N Wales district (the tightest official series containing the Lake District). This is a gridded, area-averaged product for a district far larger than the fells - it is NOT a summit-observed record. Treat it as the regional climate the fells sit within, not the weather on any single top.",
    "baseline_note": "Two standard baselines are used. The 1961-1990 normal is the older WMO reference; the 1991-2020 normal is the current one. 'Normal-vs-normal' change compares those two 30-year averages. Some figures also compare the most recent decade (2016-2025) with the decade Wainwright was writing (1956-1965) - labelled as such every time. A single year is weather, not climate.",
    "compiled_by": "hikes.guide",
    "compiled_on": "2026-07-02",
    "latest_full_year": 2025,
    "update_cadence": "Annual, each July when the Met Office releases the State of the UK Climate report and refreshes the HadUK-Grid series. Refresh: re-pull the three district .txt series, re-run the parser, add the new year to each *_by_year array, refresh the normals/decade figures and the headline.",
    "licence": "The Met Office HadUK-Grid series is Crown copyright, available under the Open Government Licence (OGL). Other figures are facts owned by their publishers (World Weather Attribution, Otto et al. 2018, Fix the Fells / National Trust, UKCEH, Met Office UKCP18); reuse must credit the original publishers. The hikes.guide aggregation may be cited as: hikes.guide, Lake District Climate Report.",
    "red_lines": [
      "Observed is not gridded is not modelled is not projected. Each figure states which it is. Do not present a projection as an observation.",
      "Weather is not climate. A single record-breaking storm or a single warm year is an illustration, never proof of a trend.",
      "Every causal / attribution statement is quoted from the body that made it (World Weather Attribution, Otto et al., the Met Office, Fix the Fells), not asserted by us.",
      "The '60 years' framing refers to the time since Wainwright, not to any continuous summit record. The district HadUK-Grid series (temperature from 1884, rainfall used from 1961, air frost from 1931) is a regional average, not a fell-top measurement. Name each series' span every time.",
      "Wainwright's words and drawings are copyright. Paraphrase only; reproduce neither long quotes nor illustrations.",
      "Tone is documentary care, not campaign copy."
    ]
  },
  "headline": {
    "warming_normal_vs_normal_c": {
      "value": 0.81,
      "unit": "C",
      "period": "1991-2020 normal vs 1961-1990 normal",
      "basis": "Mean annual temperature, England NW & N Wales district (8.39 C -> 9.21 C)",
      "confidence": "high",
      "source": "haduk-tmean",
      "as_of_date": "2026-07-02"
    },
    "warming_last_decade_vs_wainwright_c": {
      "value": 1.38,
      "unit": "C",
      "period": "2016-2025 decade vs 1956-1965 (Wainwright decade)",
      "basis": "Mean annual temperature, England NW & N Wales district (8.33 C -> 9.71 C)",
      "confidence": "high",
      "source": "haduk-tmean",
      "as_of_date": "2026-07-02",
      "note": "CORRECTION applied: this is +1.38 C on the district basis. An earlier compile using the broader 'England N' region gave +1.53 C; use the district figure so temperature, rainfall and frost all share one basis."
    },
    "warmest_years": {
      "value": "2023 and 2025 are the warmest years on record; the warmest years cluster in the last decade-plus",
      "basis": "England NW & N Wales district; the four warmest are 2023, 2025, 2022, 2014",
      "confidence": "high",
      "source": "haduk-tmean",
      "as_of_date": "2026-07-02",
      "note": "CORRECTION applied: do NOT claim 'the four warmest years are the last four years, in order' - that was a region-basis artifact; 2014 breaks the run on the district basis."
    },
    "wetter_normal_vs_normal_pct": {
      "value": 6.2,
      "unit": "percent",
      "period": "1991-2020 normal vs 1961-1990 normal",
      "basis": "Annual rainfall, England NW & N Wales district (1260 mm -> 1338 mm)",
      "confidence": "high",
      "source": "haduk-rainfall",
      "as_of_date": "2026-07-02"
    },
    "wetter_last_decade_vs_wainwright_pct": {
      "value": 13.9,
      "unit": "percent",
      "period": "2016-2025 decade vs 1956-1965 (Wainwright decade)",
      "basis": "Annual rainfall, England NW & N Wales district (1242 mm -> 1414 mm)",
      "confidence": "high",
      "source": "haduk-rainfall",
      "as_of_date": "2026-07-02",
      "note": "Roughly one-seventh wetter than the decade Wainwright was writing. The wettest year in the 1836-2025 district record is still 1872, but five of the ten wettest years since 1836 have come since 2000 (2000, 2012, 2020, 2023, 2024)."
    },
    "fewer_frost_days_pct": {
      "value": -35,
      "unit": "percent",
      "period": "2016-2025 decade vs 1956-1965 (Wainwright decade)",
      "basis": "Air-frost days per year, England NW & N Wales district (62.7 -> 41.0 days/yr)",
      "confidence": "high",
      "source": "haduk-airfrost",
      "as_of_date": "2026-07-02",
      "note": "The 'less frosty' signal for v1 rests on this observed air-frost decline plus the Met Office's national statement on declining lying snow. A Lake-District-specific lying-snow series (Fell Top Assessor index; CEDA gridded snow-lying) is a future add."
    },
    "uk_24h_rainfall_record_mm": {
      "value": 341.4,
      "unit": "mm in 24 hours",
      "period": "18:30 4 Dec to 18:30 5 Dec 2015 (Storm Desmond)",
      "basis": "Honister Pass, Cumbria - the UK record for rainfall in any 24-hour period",
      "confidence": "high",
      "source": "wwa-desmond",
      "as_of_date": "2026-07-02",
      "note": "A single extreme event, not a trend on its own. The previous UK record - 316.4 mm at Seathwaite, Cumbria, in Nov 2009 - was also set in the Lake District."
    },
    "desmond_attribution_pct": {
      "value": 40,
      "range": [
        5,
        80
      ],
      "unit": "percent more likely",
      "period": "December 2015 event, attributed 2015/2018",
      "basis": "Climate change made a Desmond-type 24-hour rainfall event roughly 40% more likely (uncertainty range 5-80%)",
      "confidence": "medium",
      "source": "wwa-desmond",
      "as_of_date": "2026-07-02",
      "note": "Attribution result from World Weather Attribution, peer-reviewed as Otto et al. 2018. State as the study's finding, with the range - not as a bare central number."
    },
    "fix_the_fells_paths_km": {
      "value": 630,
      "unit": "km of path",
      "period": "repair need over the next ~10 years (stated 2020s)",
      "basis": "Length of Lake District mountain path Fix the Fells estimates needs repair, driven by footfall and extreme weather on thin upland soils",
      "confidence": "medium",
      "source": "fixthefells",
      "as_of_date": "2026-07-02",
      "note": "Fix the Fells is a partnership (Lake District National Park, National Trust, Natural England and others). It reports work costing on the order of GBP 650,000 a year."
    },
    "windermere_warmest_years_since_2000": {
      "value": 5,
      "unit": "count (warmest years since 2000)",
      "period": "record from 1945; deviations against the 1981-2010 baseline",
      "basis": "UKCEH's Cumbrian lakes record: the five warmest years in BOTH Windermere basins have all occurred since 2000, two of them since 2014",
      "confidence": "high",
      "source": "ukceh-lakes",
      "as_of_date": "2026-09-21",
      "note": "Replaces a '+1.5 C over ~80 years, clearest in spring and early summer' figure carried here until 21 Sep 2026. The UKCEH blog we cite for it gives NO degree figure for either basin, at any depth or season - it charts deviations and states the warmest-years result above. The 1.5 C may be right and sourceable elsewhere; it was not sourceable from the citation attached to it. See windermere_warming_c_withdrawn."
    },
    "windermere_warming_c_withdrawn": {
      "value": 1.5,
      "unit": "C",
      "period": "approx. last 80 years (record from 1945)",
      "basis": "Rise in surface water temperature of Windermere over the long-term UKCEH/FBA monitoring record",
      "confidence": "medium",
      "source": "ukceh-lakes",
      "as_of_date": "2026-07-02",
      "note": "The Cumbrian lakes record (Windermere, Esthwaite, Blelham) is among the most comprehensive in the world; warming is clearest in spring and early summer surface temperatures.",
      "withdrawn_on": "2026-09-21",
      "withdrawn_because": "the linked UKCEH article states no degree figure for Windermere, so this value had no source on this page. Do not restore it from that blog; find a study or dataset that gives the basin, depth and comparison periods."
    },
    "projection_winter_wetter_pct_2070": {
      "value": 39,
      "unit": "percent wetter (90th percentile)",
      "period": "by 2070, high-emissions scenario",
      "basis": "UKCP18 headline findings v4.0 (Aug 2022), 3.1.2 and 3.2.2: by 2070 under high emissions, UK-average winter warming of 0.6-3.8 C and winter precipitation change of -3% to +39%, between the 10% and 90% probability levels",
      "confidence": "medium",
      "source": "ukcp18",
      "as_of_date": "2026-07-02",
      "note": "A modelled projection at UK scale, not an observation and not Lake-District-specific. 39% is the 90th percentile of the winter range, not a ceiling - always name the scenario and the interval."
    }
  },
  "temperature_by_year": [
    {
      "year": 1884,
      "tmean_c": 8.42,
      "anom_vs_1961_1990": 0.03,
      "rolling10_c": null
    },
    {
      "year": 1885,
      "tmean_c": 7.14,
      "anom_vs_1961_1990": -1.25,
      "rolling10_c": null
    },
    {
      "year": 1886,
      "tmean_c": 7.34,
      "anom_vs_1961_1990": -1.05,
      "rolling10_c": null
    },
    {
      "year": 1887,
      "tmean_c": 7.25,
      "anom_vs_1961_1990": -1.14,
      "rolling10_c": null
    },
    {
      "year": 1888,
      "tmean_c": 7.14,
      "anom_vs_1961_1990": -1.25,
      "rolling10_c": null
    },
    {
      "year": 1889,
      "tmean_c": 7.87,
      "anom_vs_1961_1990": -0.52,
      "rolling10_c": null
    },
    {
      "year": 1890,
      "tmean_c": 7.8,
      "anom_vs_1961_1990": -0.59,
      "rolling10_c": null
    },
    {
      "year": 1891,
      "tmean_c": 7.54,
      "anom_vs_1961_1990": -0.85,
      "rolling10_c": null
    },
    {
      "year": 1892,
      "tmean_c": 6.95,
      "anom_vs_1961_1990": -1.44,
      "rolling10_c": null
    },
    {
      "year": 1893,
      "tmean_c": 8.84,
      "anom_vs_1961_1990": 0.45,
      "rolling10_c": 7.63
    },
    {
      "year": 1894,
      "tmean_c": 8.15,
      "anom_vs_1961_1990": -0.24,
      "rolling10_c": 7.6
    },
    {
      "year": 1895,
      "tmean_c": 7.34,
      "anom_vs_1961_1990": -1.05,
      "rolling10_c": 7.62
    },
    {
      "year": 1896,
      "tmean_c": 8.16,
      "anom_vs_1961_1990": -0.23,
      "rolling10_c": 7.7
    },
    {
      "year": 1897,
      "tmean_c": 8.22,
      "anom_vs_1961_1990": -0.17,
      "rolling10_c": 7.8
    },
    {
      "year": 1898,
      "tmean_c": 8.82,
      "anom_vs_1961_1990": 0.43,
      "rolling10_c": 7.97
    },
    {
      "year": 1899,
      "tmean_c": 8.5,
      "anom_vs_1961_1990": 0.11,
      "rolling10_c": 8.03
    },
    {
      "year": 1900,
      "tmean_c": 8.31,
      "anom_vs_1961_1990": -0.08,
      "rolling10_c": 8.08
    },
    {
      "year": 1901,
      "tmean_c": 8.09,
      "anom_vs_1961_1990": -0.3,
      "rolling10_c": 8.14
    },
    {
      "year": 1902,
      "tmean_c": 7.68,
      "anom_vs_1961_1990": -0.71,
      "rolling10_c": 8.21
    },
    {
      "year": 1903,
      "tmean_c": 8.06,
      "anom_vs_1961_1990": -0.33,
      "rolling10_c": 8.13
    },
    {
      "year": 1904,
      "tmean_c": 7.93,
      "anom_vs_1961_1990": -0.46,
      "rolling10_c": 8.11
    },
    {
      "year": 1905,
      "tmean_c": 8.13,
      "anom_vs_1961_1990": -0.26,
      "rolling10_c": 8.19
    },
    {
      "year": 1906,
      "tmean_c": 8.36,
      "anom_vs_1961_1990": -0.03,
      "rolling10_c": 8.21
    },
    {
      "year": 1907,
      "tmean_c": 7.91,
      "anom_vs_1961_1990": -0.48,
      "rolling10_c": 8.18
    },
    {
      "year": 1908,
      "tmean_c": 8.37,
      "anom_vs_1961_1990": -0.02,
      "rolling10_c": 8.13
    },
    {
      "year": 1909,
      "tmean_c": 7.62,
      "anom_vs_1961_1990": -0.77,
      "rolling10_c": 8.05
    },
    {
      "year": 1910,
      "tmean_c": 8.18,
      "anom_vs_1961_1990": -0.21,
      "rolling10_c": 8.03
    },
    {
      "year": 1911,
      "tmean_c": 8.91,
      "anom_vs_1961_1990": 0.52,
      "rolling10_c": 8.12
    },
    {
      "year": 1912,
      "tmean_c": 8.25,
      "anom_vs_1961_1990": -0.14,
      "rolling10_c": 8.17
    },
    {
      "year": 1913,
      "tmean_c": 8.7,
      "anom_vs_1961_1990": 0.31,
      "rolling10_c": 8.24
    },
    {
      "year": 1914,
      "tmean_c": 8.82,
      "anom_vs_1961_1990": 0.43,
      "rolling10_c": 8.32
    },
    {
      "year": 1915,
      "tmean_c": 7.87,
      "anom_vs_1961_1990": -0.52,
      "rolling10_c": 8.3
    },
    {
      "year": 1916,
      "tmean_c": 8.19,
      "anom_vs_1961_1990": -0.2,
      "rolling10_c": 8.28
    },
    {
      "year": 1917,
      "tmean_c": 7.6,
      "anom_vs_1961_1990": -0.79,
      "rolling10_c": 8.25
    },
    {
      "year": 1918,
      "tmean_c": 8.47,
      "anom_vs_1961_1990": 0.08,
      "rolling10_c": 8.26
    },
    {
      "year": 1919,
      "tmean_c": 7.46,
      "anom_vs_1961_1990": -0.93,
      "rolling10_c": 8.24
    },
    {
      "year": 1920,
      "tmean_c": 8.51,
      "anom_vs_1961_1990": 0.12,
      "rolling10_c": 8.28
    },
    {
      "year": 1921,
      "tmean_c": 9.28,
      "anom_vs_1961_1990": 0.89,
      "rolling10_c": 8.32
    },
    {
      "year": 1922,
      "tmean_c": 7.59,
      "anom_vs_1961_1990": -0.8,
      "rolling10_c": 8.25
    },
    {
      "year": 1923,
      "tmean_c": 8.03,
      "anom_vs_1961_1990": -0.36,
      "rolling10_c": 8.18
    },
    {
      "year": 1924,
      "tmean_c": 8.22,
      "anom_vs_1961_1990": -0.17,
      "rolling10_c": 8.12
    },
    {
      "year": 1925,
      "tmean_c": 8.14,
      "anom_vs_1961_1990": -0.25,
      "rolling10_c": 8.15
    },
    {
      "year": 1926,
      "tmean_c": 8.67,
      "anom_vs_1961_1990": 0.28,
      "rolling10_c": 8.2
    },
    {
      "year": 1927,
      "tmean_c": 8.14,
      "anom_vs_1961_1990": -0.25,
      "rolling10_c": 8.25
    },
    {
      "year": 1928,
      "tmean_c": 8.43,
      "anom_vs_1961_1990": 0.04,
      "rolling10_c": 8.25
    },
    {
      "year": 1929,
      "tmean_c": 8.02,
      "anom_vs_1961_1990": -0.37,
      "rolling10_c": 8.3
    },
    {
      "year": 1930,
      "tmean_c": 8.28,
      "anom_vs_1961_1990": -0.11,
      "rolling10_c": 8.28
    },
    {
      "year": 1931,
      "tmean_c": 7.97,
      "anom_vs_1961_1990": -0.42,
      "rolling10_c": 8.15
    },
    {
      "year": 1932,
      "tmean_c": 8.39,
      "anom_vs_1961_1990": -0.0,
      "rolling10_c": 8.23
    },
    {
      "year": 1933,
      "tmean_c": 8.8,
      "anom_vs_1961_1990": 0.41,
      "rolling10_c": 8.31
    },
    {
      "year": 1934,
      "tmean_c": 8.89,
      "anom_vs_1961_1990": 0.5,
      "rolling10_c": 8.37
    },
    {
      "year": 1935,
      "tmean_c": 8.58,
      "anom_vs_1961_1990": 0.19,
      "rolling10_c": 8.42
    },
    {
      "year": 1936,
      "tmean_c": 8.29,
      "anom_vs_1961_1990": -0.1,
      "rolling10_c": 8.38
    },
    {
      "year": 1937,
      "tmean_c": 8.36,
      "anom_vs_1961_1990": -0.03,
      "rolling10_c": 8.4
    },
    {
      "year": 1938,
      "tmean_c": 8.97,
      "anom_vs_1961_1990": 0.58,
      "rolling10_c": 8.46
    },
    {
      "year": 1939,
      "tmean_c": 8.57,
      "anom_vs_1961_1990": 0.18,
      "rolling10_c": 8.51
    },
    {
      "year": 1940,
      "tmean_c": 7.99,
      "anom_vs_1961_1990": -0.4,
      "rolling10_c": 8.48
    },
    {
      "year": 1941,
      "tmean_c": 8.07,
      "anom_vs_1961_1990": -0.32,
      "rolling10_c": 8.49
    },
    {
      "year": 1942,
      "tmean_c": 8.09,
      "anom_vs_1961_1990": -0.3,
      "rolling10_c": 8.46
    },
    {
      "year": 1943,
      "tmean_c": 8.87,
      "anom_vs_1961_1990": 0.48,
      "rolling10_c": 8.47
    },
    {
      "year": 1944,
      "tmean_c": 8.49,
      "anom_vs_1961_1990": 0.1,
      "rolling10_c": 8.43
    },
    {
      "year": 1945,
      "tmean_c": 9.13,
      "anom_vs_1961_1990": 0.74,
      "rolling10_c": 8.48
    },
    {
      "year": 1946,
      "tmean_c": 8.33,
      "anom_vs_1961_1990": -0.06,
      "rolling10_c": 8.49
    },
    {
      "year": 1947,
      "tmean_c": 8.39,
      "anom_vs_1961_1990": -0.0,
      "rolling10_c": 8.49
    },
    {
      "year": 1948,
      "tmean_c": 8.89,
      "anom_vs_1961_1990": 0.5,
      "rolling10_c": 8.48
    },
    {
      "year": 1949,
      "tmean_c": 9.51,
      "anom_vs_1961_1990": 1.12,
      "rolling10_c": 8.58
    },
    {
      "year": 1950,
      "tmean_c": 8.36,
      "anom_vs_1961_1990": -0.03,
      "rolling10_c": 8.61
    },
    {
      "year": 1951,
      "tmean_c": 8.18,
      "anom_vs_1961_1990": -0.21,
      "rolling10_c": 8.62
    },
    {
      "year": 1952,
      "tmean_c": 8.08,
      "anom_vs_1961_1990": -0.31,
      "rolling10_c": 8.62
    },
    {
      "year": 1953,
      "tmean_c": 9.03,
      "anom_vs_1961_1990": 0.64,
      "rolling10_c": 8.64
    },
    {
      "year": 1954,
      "tmean_c": 8.22,
      "anom_vs_1961_1990": -0.17,
      "rolling10_c": 8.61
    },
    {
      "year": 1955,
      "tmean_c": 8.32,
      "anom_vs_1961_1990": -0.07,
      "rolling10_c": 8.53
    },
    {
      "year": 1956,
      "tmean_c": 7.99,
      "anom_vs_1961_1990": -0.4,
      "rolling10_c": 8.5
    },
    {
      "year": 1957,
      "tmean_c": 8.98,
      "anom_vs_1961_1990": 0.59,
      "rolling10_c": 8.56
    },
    {
      "year": 1958,
      "tmean_c": 8.35,
      "anom_vs_1961_1990": -0.04,
      "rolling10_c": 8.5
    },
    {
      "year": 1959,
      "tmean_c": 9.39,
      "anom_vs_1961_1990": 1.0,
      "rolling10_c": 8.49
    },
    {
      "year": 1960,
      "tmean_c": 8.6,
      "anom_vs_1961_1990": 0.21,
      "rolling10_c": 8.51
    },
    {
      "year": 1961,
      "tmean_c": 8.69,
      "anom_vs_1961_1990": 0.3,
      "rolling10_c": 8.57
    },
    {
      "year": 1962,
      "tmean_c": 7.58,
      "anom_vs_1961_1990": -0.81,
      "rolling10_c": 8.52
    },
    {
      "year": 1963,
      "tmean_c": 7.48,
      "anom_vs_1961_1990": -0.91,
      "rolling10_c": 8.36
    },
    {
      "year": 1964,
      "tmean_c": 8.37,
      "anom_vs_1961_1990": -0.02,
      "rolling10_c": 8.38
    },
    {
      "year": 1965,
      "tmean_c": 7.86,
      "anom_vs_1961_1990": -0.53,
      "rolling10_c": 8.33
    },
    {
      "year": 1966,
      "tmean_c": 8.31,
      "anom_vs_1961_1990": -0.08,
      "rolling10_c": 8.36
    },
    {
      "year": 1967,
      "tmean_c": 8.47,
      "anom_vs_1961_1990": 0.08,
      "rolling10_c": 8.31
    },
    {
      "year": 1968,
      "tmean_c": 8.29,
      "anom_vs_1961_1990": -0.1,
      "rolling10_c": 8.3
    },
    {
      "year": 1969,
      "tmean_c": 8.11,
      "anom_vs_1961_1990": -0.28,
      "rolling10_c": 8.18
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      "year": 1932,
      "air_frost_days": 54.5,
      "anom_vs_1961_1990_days": -3.7,
      "rolling10_days": null
    },
    {
      "year": 1933,
      "air_frost_days": 71.8,
      "anom_vs_1961_1990_days": 13.6,
      "rolling10_days": null
    },
    {
      "year": 1934,
      "air_frost_days": 43.7,
      "anom_vs_1961_1990_days": -14.5,
      "rolling10_days": null
    },
    {
      "year": 1935,
      "air_frost_days": 49.8,
      "anom_vs_1961_1990_days": -8.4,
      "rolling10_days": null
    },
    {
      "year": 1936,
      "air_frost_days": 65.2,
      "anom_vs_1961_1990_days": 7.0,
      "rolling10_days": null
    },
    {
      "year": 1937,
      "air_frost_days": 65.2,
      "anom_vs_1961_1990_days": 7.0,
      "rolling10_days": null
    },
    {
      "year": 1938,
      "air_frost_days": 36.7,
      "anom_vs_1961_1990_days": -21.5,
      "rolling10_days": null
    },
    {
      "year": 1939,
      "air_frost_days": 47.4,
      "anom_vs_1961_1990_days": -10.8,
      "rolling10_days": null
    },
    {
      "year": 1940,
      "air_frost_days": 70.8,
      "anom_vs_1961_1990_days": 12.6,
      "rolling10_days": 56.7
    },
    {
      "year": 1941,
      "air_frost_days": 78.3,
      "anom_vs_1961_1990_days": 20.1,
      "rolling10_days": 58.3
    },
    {
      "year": 1942,
      "air_frost_days": 82.7,
      "anom_vs_1961_1990_days": 24.5,
      "rolling10_days": 61.2
    },
    {
      "year": 1943,
      "air_frost_days": 41.9,
      "anom_vs_1961_1990_days": -16.3,
      "rolling10_days": 58.2
    },
    {
      "year": 1944,
      "air_frost_days": 48.1,
      "anom_vs_1961_1990_days": -10.1,
      "rolling10_days": 58.6
    },
    {
      "year": 1945,
      "air_frost_days": 47.5,
      "anom_vs_1961_1990_days": -10.7,
      "rolling10_days": 58.4
    },
    {
      "year": 1946,
      "air_frost_days": 59.3,
      "anom_vs_1961_1990_days": 1.1,
      "rolling10_days": 57.8
    },
    {
      "year": 1947,
      "air_frost_days": 79.3,
      "anom_vs_1961_1990_days": 21.1,
      "rolling10_days": 59.2
    },
    {
      "year": 1948,
      "air_frost_days": 46.1,
      "anom_vs_1961_1990_days": -12.1,
      "rolling10_days": 60.1
    },
    {
      "year": 1949,
      "air_frost_days": 37.6,
      "anom_vs_1961_1990_days": -20.6,
      "rolling10_days": 59.2
    },
    {
      "year": 1950,
      "air_frost_days": 62.6,
      "anom_vs_1961_1990_days": 4.4,
      "rolling10_days": 58.3
    },
    {
      "year": 1951,
      "air_frost_days": 64.3,
      "anom_vs_1961_1990_days": 6.1,
      "rolling10_days": 56.9
    },
    {
      "year": 1952,
      "air_frost_days": 75.0,
      "anom_vs_1961_1990_days": 16.8,
      "rolling10_days": 56.2
    },
    {
      "year": 1953,
      "air_frost_days": 51.1,
      "anom_vs_1961_1990_days": -7.1,
      "rolling10_days": 57.1
    },
    {
      "year": 1954,
      "air_frost_days": 54.0,
      "anom_vs_1961_1990_days": -4.2,
      "rolling10_days": 57.7
    },
    {
      "year": 1955,
      "air_frost_days": 88.8,
      "anom_vs_1961_1990_days": 30.6,
      "rolling10_days": 61.8
    },
    {
      "year": 1956,
      "air_frost_days": 72.2,
      "anom_vs_1961_1990_days": 14.0,
      "rolling10_days": 63.1
    },
    {
      "year": 1957,
      "air_frost_days": 41.8,
      "anom_vs_1961_1990_days": -16.4,
      "rolling10_days": 59.4
    },
    {
      "year": 1958,
      "air_frost_days": 71.5,
      "anom_vs_1961_1990_days": 13.3,
      "rolling10_days": 61.9
    },
    {
      "year": 1959,
      "air_frost_days": 46.0,
      "anom_vs_1961_1990_days": -12.2,
      "rolling10_days": 62.7
    },
    {
      "year": 1960,
      "air_frost_days": 60.3,
      "anom_vs_1961_1990_days": 2.1,
      "rolling10_days": 62.5
    },
    {
      "year": 1961,
      "air_frost_days": 48.3,
      "anom_vs_1961_1990_days": -9.9,
      "rolling10_days": 60.9
    },
    {
      "year": 1962,
      "air_frost_days": 72.0,
      "anom_vs_1961_1990_days": 13.8,
      "rolling10_days": 60.6
    },
    {
      "year": 1963,
      "air_frost_days": 83.4,
      "anom_vs_1961_1990_days": 25.2,
      "rolling10_days": 63.8
    },
    {
      "year": 1964,
      "air_frost_days": 60.9,
      "anom_vs_1961_1990_days": 2.7,
      "rolling10_days": 64.5
    },
    {
      "year": 1965,
      "air_frost_days": 70.6,
      "anom_vs_1961_1990_days": 12.4,
      "rolling10_days": 62.7
    },
    {
      "year": 1966,
      "air_frost_days": 48.4,
      "anom_vs_1961_1990_days": -9.8,
      "rolling10_days": 60.3
    },
    {
      "year": 1967,
      "air_frost_days": 46.9,
      "anom_vs_1961_1990_days": -11.3,
      "rolling10_days": 60.8
    },
    {
      "year": 1968,
      "air_frost_days": 73.4,
      "anom_vs_1961_1990_days": 15.2,
      "rolling10_days": 61.0
    },
    {
      "year": 1969,
      "air_frost_days": 83.7,
      "anom_vs_1961_1990_days": 25.5,
      "rolling10_days": 64.8
    },
    {
      "year": 1970,
      "air_frost_days": 67.2,
      "anom_vs_1961_1990_days": 9.0,
      "rolling10_days": 65.5
    },
    {
      "year": 1971,
      "air_frost_days": 48.3,
      "anom_vs_1961_1990_days": -9.9,
      "rolling10_days": 65.5
    },
    {
      "year": 1972,
      "air_frost_days": 41.6,
      "anom_vs_1961_1990_days": -16.6,
      "rolling10_days": 62.4
    },
    {
      "year": 1973,
      "air_frost_days": 59.7,
      "anom_vs_1961_1990_days": 1.5,
      "rolling10_days": 60.1
    },
    {
      "year": 1974,
      "air_frost_days": 34.1,
      "anom_vs_1961_1990_days": -24.1,
      "rolling10_days": 57.4
    },
    {
      "year": 1975,
      "air_frost_days": 50.9,
      "anom_vs_1961_1990_days": -7.3,
      "rolling10_days": 55.4
    },
    {
      "year": 1976,
      "air_frost_days": 59.8,
      "anom_vs_1961_1990_days": 1.6,
      "rolling10_days": 56.6
    },
    {
      "year": 1977,
      "air_frost_days": 47.2,
      "anom_vs_1961_1990_days": -11.0,
      "rolling10_days": 56.6
    },
    {
      "year": 1978,
      "air_frost_days": 61.6,
      "anom_vs_1961_1990_days": 3.4,
      "rolling10_days": 55.4
    },
    {
      "year": 1979,
      "air_frost_days": 84.5,
      "anom_vs_1961_1990_days": 26.3,
      "rolling10_days": 55.5
    },
    {
      "year": 1980,
      "air_frost_days": 59.3,
      "anom_vs_1961_1990_days": 1.1,
      "rolling10_days": 54.7
    },
    {
      "year": 1981,
      "air_frost_days": 69.2,
      "anom_vs_1961_1990_days": 11.0,
      "rolling10_days": 56.8
    },
    {
      "year": 1982,
      "air_frost_days": 53.5,
      "anom_vs_1961_1990_days": -4.7,
      "rolling10_days": 58.0
    },
    {
      "year": 1983,
      "air_frost_days": 52.3,
      "anom_vs_1961_1990_days": -5.9,
      "rolling10_days": 57.2
    },
    {
      "year": 1984,
      "air_frost_days": 52.9,
      "anom_vs_1961_1990_days": -5.3,
      "rolling10_days": 59.1
    },
    {
      "year": 1985,
      "air_frost_days": 76.2,
      "anom_vs_1961_1990_days": 18.0,
      "rolling10_days": 61.6
    },
    {
      "year": 1986,
      "air_frost_days": 65.4,
      "anom_vs_1961_1990_days": 7.2,
      "rolling10_days": 62.2
    },
    {
      "year": 1987,
      "air_frost_days": 67.4,
      "anom_vs_1961_1990_days": 9.2,
      "rolling10_days": 64.2
    },
    {
      "year": 1988,
      "air_frost_days": 35.8,
      "anom_vs_1961_1990_days": -22.4,
      "rolling10_days": 61.7
    },
    {
      "year": 1989,
      "air_frost_days": 39.6,
      "anom_vs_1961_1990_days": -18.6,
      "rolling10_days": 57.2
    },
    {
      "year": 1990,
      "air_frost_days": 30.7,
      "anom_vs_1961_1990_days": -27.5,
      "rolling10_days": 54.3
    },
    {
      "year": 1991,
      "air_frost_days": 58.7,
      "anom_vs_1961_1990_days": 0.5,
      "rolling10_days": 53.2
    },
    {
      "year": 1992,
      "air_frost_days": 47.3,
      "anom_vs_1961_1990_days": -10.9,
      "rolling10_days": 52.6
    },
    {
      "year": 1993,
      "air_frost_days": 50.7,
      "anom_vs_1961_1990_days": -7.5,
      "rolling10_days": 52.5
    },
    {
      "year": 1994,
      "air_frost_days": 37.1,
      "anom_vs_1961_1990_days": -21.1,
      "rolling10_days": 50.9
    },
    {
      "year": 1995,
      "air_frost_days": 57.0,
      "anom_vs_1961_1990_days": -1.2,
      "rolling10_days": 49.0
    },
    {
      "year": 1996,
      "air_frost_days": 76.6,
      "anom_vs_1961_1990_days": 18.4,
      "rolling10_days": 50.1
    },
    {
      "year": 1997,
      "air_frost_days": 42.9,
      "anom_vs_1961_1990_days": -15.3,
      "rolling10_days": 47.6
    },
    {
      "year": 1998,
      "air_frost_days": 37.2,
      "anom_vs_1961_1990_days": -21.0,
      "rolling10_days": 47.8
    },
    {
      "year": 1999,
      "air_frost_days": 35.4,
      "anom_vs_1961_1990_days": -22.8,
      "rolling10_days": 47.4
    },
    {
      "year": 2000,
      "air_frost_days": 35.7,
      "anom_vs_1961_1990_days": -22.5,
      "rolling10_days": 47.9
    },
    {
      "year": 2001,
      "air_frost_days": 69.5,
      "anom_vs_1961_1990_days": 11.3,
      "rolling10_days": 48.9
    },
    {
      "year": 2002,
      "air_frost_days": 31.1,
      "anom_vs_1961_1990_days": -27.1,
      "rolling10_days": 47.3
    },
    {
      "year": 2003,
      "air_frost_days": 57.7,
      "anom_vs_1961_1990_days": -0.5,
      "rolling10_days": 48.0
    },
    {
      "year": 2004,
      "air_frost_days": 43.3,
      "anom_vs_1961_1990_days": -14.9,
      "rolling10_days": 48.6
    },
    {
      "year": 2005,
      "air_frost_days": 49.5,
      "anom_vs_1961_1990_days": -8.7,
      "rolling10_days": 47.9
    },
    {
      "year": 2006,
      "air_frost_days": 47.5,
      "anom_vs_1961_1990_days": -10.7,
      "rolling10_days": 45.0
    },
    {
      "year": 2007,
      "air_frost_days": 36.5,
      "anom_vs_1961_1990_days": -21.7,
      "rolling10_days": 44.3
    },
    {
      "year": 2008,
      "air_frost_days": 51.0,
      "anom_vs_1961_1990_days": -7.2,
      "rolling10_days": 45.7
    },
    {
      "year": 2009,
      "air_frost_days": 50.9,
      "anom_vs_1961_1990_days": -7.3,
      "rolling10_days": 47.3
    },
    {
      "year": 2010,
      "air_frost_days": 94.1,
      "anom_vs_1961_1990_days": 35.9,
      "rolling10_days": 53.1
    },
    {
      "year": 2011,
      "air_frost_days": 37.5,
      "anom_vs_1961_1990_days": -20.7,
      "rolling10_days": 49.9
    },
    {
      "year": 2012,
      "air_frost_days": 47.8,
      "anom_vs_1961_1990_days": -10.4,
      "rolling10_days": 51.6
    },
    {
      "year": 2013,
      "air_frost_days": 72.3,
      "anom_vs_1961_1990_days": 14.1,
      "rolling10_days": 53.0
    },
    {
      "year": 2014,
      "air_frost_days": 22.3,
      "anom_vs_1961_1990_days": -35.9,
      "rolling10_days": 50.9
    },
    {
      "year": 2015,
      "air_frost_days": 37.2,
      "anom_vs_1961_1990_days": -21.0,
      "rolling10_days": 49.7
    },
    {
      "year": 2016,
      "air_frost_days": 47.1,
      "anom_vs_1961_1990_days": -11.1,
      "rolling10_days": 49.7
    },
    {
      "year": 2017,
      "air_frost_days": 41.3,
      "anom_vs_1961_1990_days": -16.9,
      "rolling10_days": 50.2
    },
    {
      "year": 2018,
      "air_frost_days": 47.2,
      "anom_vs_1961_1990_days": -11.0,
      "rolling10_days": 49.8
    },
    {
      "year": 2019,
      "air_frost_days": 40.1,
      "anom_vs_1961_1990_days": -18.1,
      "rolling10_days": 48.7
    },
    {
      "year": 2020,
      "air_frost_days": 28.6,
      "anom_vs_1961_1990_days": -29.6,
      "rolling10_days": 42.1
    },
    {
      "year": 2021,
      "air_frost_days": 60.3,
      "anom_vs_1961_1990_days": 2.1,
      "rolling10_days": 44.4
    },
    {
      "year": 2022,
      "air_frost_days": 38.3,
      "anom_vs_1961_1990_days": -19.9,
      "rolling10_days": 43.5
    },
    {
      "year": 2023,
      "air_frost_days": 37.4,
      "anom_vs_1961_1990_days": -20.8,
      "rolling10_days": 40.0
    },
    {
      "year": 2024,
      "air_frost_days": 30.7,
      "anom_vs_1961_1990_days": -27.5,
      "rolling10_days": 40.8
    },
    {
      "year": 2025,
      "air_frost_days": 38.5,
      "anom_vs_1961_1990_days": -19.7,
      "rolling10_days": 41.0
    }
  ],
  "temperature_normals": [
    {
      "baseline": "1961-1990",
      "mean_annual_c": 8.39,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    },
    {
      "baseline": "1991-2020",
      "mean_annual_c": 9.21,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    },
    {
      "period": "2016-2025 decade",
      "mean_annual_c": 9.71,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    },
    {
      "period": "1956-1965 (Wainwright decade)",
      "mean_annual_c": 8.33,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    },
    {
      "period": "1966 (single year - weather, not climate)",
      "mean_annual_c": 8.31,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    },
    {
      "period": "2025 (single year - weather, not climate)",
      "mean_annual_c": 10.1,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-tmean"
    }
  ],
  "rainfall_normals": [
    {
      "baseline": "1961-1990",
      "mean_annual_mm": 1260,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-rainfall"
    },
    {
      "baseline": "1991-2020",
      "mean_annual_mm": 1338,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-rainfall"
    },
    {
      "period": "2016-2025 decade",
      "mean_annual_mm": 1414,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-rainfall"
    },
    {
      "period": "1956-1965 (Wainwright decade)",
      "mean_annual_mm": 1242,
      "basis": "HadUK-Grid areal series, England NW & N Wales",
      "confidence": "high",
      "source": "haduk-rainfall"
    }
  ],
  "uk_24h_rainfall_records": [
    {
      "rank": "current UK record",
      "station": "Honister Pass",
      "county": "Cumbria (Lake District)",
      "value_mm": 341.4,
      "window": "24 hours (18:30 4 Dec - 18:30 5 Dec 2015)",
      "event": "Storm Desmond",
      "confidence": "high",
      "source": "wwa-desmond",
      "note": "First Met Office red rainfall warning for Cumbria since 2014; over 5,000 homes and businesses flooded."
    },
    {
      "rank": "previous UK record",
      "station": "Seathwaite",
      "county": "Cumbria (Lake District)",
      "value_mm": 316.4,
      "window": "24 hours",
      "event": "November 2009 Cumbria floods",
      "confidence": "high",
      "source": "wwa-desmond",
      "note": "The record Desmond broke - also a Lake District location."
    }
  ],
  "attribution": [
    {
      "event": "Storm Desmond 24-hour rainfall, December 2015",
      "finding": "Climate change made an event of this kind roughly 40% more likely (real-time estimate); the peer-reviewed revisit put the best estimate at 59% but with a wider range that includes no change",
      "central_pct": 40,
      "range_pct": [
        5,
        80
      ],
      "real_time_central_pct": 40,
      "real_time_range_pct": [
        5,
        80
      ],
      "real_time_note": "First (real-time) estimate published December 2015; about 40% more likely, provisional 2.5%-97.5% confidence interval 5%-80%. Verified verbatim in the paper's abstract, 3 Jul 2026.",
      "peer_reviewed_central_pct": 59,
      "peer_reviewed_upper_pct": 250,
      "peer_reviewed_includes_zero": true,
      "peer_reviewed_note": "Revised analysis (extra station data, a second monthly event definition, a second climate model and updated regional simulations): best estimate 59% increase in risk, with a larger uncertainty range that includes 0 (no change) and an upper bound of 250%. Verified verbatim in the paper's conclusion, 3 Jul 2026.",
      "method": "Three independent peer-reviewed approaches (historical trend, coupled climate model, regional large-ensemble), all in agreement; the increase is described as small but robust",
      "confidence": "medium",
      "source": "wwa-desmond",
      "peer_reviewed_as": "Otto, F.E.L. et al. (2018), Environmental Research Letters, doi:10.1088/1748-9326/aa9663",
      "caveat": "Considers only externally-driven changes in precipitation; flood risk also depends on exposure and vulnerability. Attribute to the study; never present as our own claim."
    }
  ],
  "impacts": [
    {
      "metric": "Mountain path needing repair",
      "value": 630,
      "unit": "km",
      "period": "over the next ~10 years (stated 2020s)",
      "organisation": "Fix the Fells",
      "driver": "Erosion from footfall and extreme weather on thin upland soils",
      "confidence": "medium",
      "source": "fixthefells"
    },
    {
      "metric": "Annual cost of upland path work",
      "value": 650000,
      "unit": "GBP/year (approx.)",
      "period": "recent years",
      "organisation": "Fix the Fells",
      "confidence": "medium",
      "source": "fixthefells",
      "note": "Order-of-magnitude figure quoted by the partnership; verify the current figure at build time."
    }
  ],
  "lake_temperature": [
    {
      "lake": "Windermere",
      "metric": "Surface water temperature rise",
      "value_c": 1.5,
      "period": "approx. last 80 years (monitoring from 1945)",
      "organisation": "UKCEH (record begun by the FBA)",
      "confidence": "medium",
      "source": "ukceh-lakes",
      "note": "Warming clearest in spring and early-summer surface temperatures; the Cumbrian lakes record is among the most comprehensive in the world."
    }
  ],
  "projections": [
    {
      "scenario": "High emissions (UKCP18, RCP8.5-equivalent)",
      "horizon": "by 2070",
      "geography": "UK-scale",
      "confidence": "medium",
      "source": "ukcp18",
      "note": "Modelled projection, not an observation and not Lake-District-specific. Each range is the 10%-90% probability interval from the edition named above, read from the document itself on 21 Sep 2026 - the previous 'up to' figures of 3.4 C winter warming and 44% summer drying are not in that edition, and no numeric rainfall-intensity projection is either. Name the scenario and the interval every time; an upper bound here is a 90th percentile, not a ceiling.",
      "winter_warmer_c_range": [
        0.6,
        3.8
      ],
      "winter_wetter_pct_range": [
        -3,
        39
      ],
      "summer_hotter_c_range": [
        1.3,
        5.1
      ],
      "summer_drier_pct_range": [
        -45,
        5
      ],
      "probability_levels": "10% to 90% of the UKCP18 probabilistic (25 km) projections, UK-averaged",
      "edition": "UKCP18 headline findings v4.0, 3 August 2022, sections 3.1.2 and 3.2.2"
    }
  ],
  "snow_context": {
    "statement": "For v1 the 'less frosty' story rests on (a) the observed district air-frost decline (-35% since Wainwright's decade, high confidence, above) and (b) the Met Office's national finding that lying snow and air frost have declined across the UK. A Lake-District-specific lying-snow series is not yet compiled.",
    "national_snow_source": "state-of-uk-climate",
    "confidence": "medium",
    "gaps": "Confirm the exact national lying-snow figure from the latest State of the UK Climate report at build time. Future adds: the LDNPA Fell Top Assessor snow index (pending a data reply) and the CEDA gridded days-of-snow-lying series (a NetCDF extract job). Neither is faked or estimated in the interim."
  },
  "caveats_and_gaps": [
    "The temperature, rainfall and frost series are gridded area-averages for the England NW & N Wales district - a region much larger than the fells. They describe the regional climate the Lake District sits within, not the weather on any summit. There is no continuous long-run summit-observed climate series for the fells.",
    "Series spans differ: temperature from 1884, rainfall used from 1961 (with sparse earlier sample years back to 1836), air frost from 1931. Name the span whenever a figure is quoted; do not imply a single continuous 60-year fell-top record.",
    "Single events (Storm Desmond) and single years (2023, 2025) illustrate the direction of change but are weather, not proof of climate trend.",
    "Attribution figures (Desmond ~40%, 5-80%) are the studies' findings and carry real uncertainty - always shown as a range and attributed to World Weather Attribution / Otto et al.",
    "Projections (UKCP18) are modelled, scenario-dependent and UK-scale, not observations and not downscaled to the fells here.",
    "Lake-temperature figures are for named lakes (Windermere) from UKCEH, not the fells; included as an adjacent, well-observed indicator.",
    "Two figures were corrected during compile to a single consistent district basis: warming vs the Wainwright decade is +1.38 C (not +1.53 C), and the claim 'the four warmest years are the last four in order' was dropped (2014 is among the four warmest)."
  ],
  "sources": [
    {
      "ref": "haduk-tmean",
      "title": "HadUK-Grid areal series - mean air temperature, England NW & N Wales district",
      "publisher": "Met Office (National Climate Information Centre)",
      "date": "updated 2026",
      "url": "https://www.metoffice.gov.uk/pub/data/weather/uk/climate/datasets/Tmean/date/England_NW_and_N_Wales.txt",
      "licence": "Open Government Licence, Crown copyright",
      "supports": "Mean annual temperature series 1884-2025; 1961-1990 normal 8.39 C; 1991-2020 normal 9.21 C; decade and warmest-year figures"
    },
    {
      "ref": "haduk-rainfall",
      "title": "HadUK-Grid areal series - rainfall, England NW & N Wales district",
      "publisher": "Met Office (National Climate Information Centre)",
      "date": "updated 2026",
      "url": "https://www.metoffice.gov.uk/pub/data/weather/uk/climate/datasets/Rainfall/date/England_NW_and_N_Wales.txt",
      "licence": "Open Government Licence, Crown copyright",
      "supports": "Annual rainfall series from 1836; 1961-1990 normal 1260 mm; 1991-2020 normal 1338 mm; full-record wettest-year ranking"
    },
    {
      "ref": "haduk-airfrost",
      "title": "HadUK-Grid areal series - days of air frost, England NW & N Wales district",
      "publisher": "Met Office (National Climate Information Centre)",
      "date": "updated 2026",
      "url": "https://www.metoffice.gov.uk/pub/data/weather/uk/climate/datasets/AirFrost/date/England_NW_and_N_Wales.txt",
      "licence": "Open Government Licence, Crown copyright",
      "supports": "Air-frost days per year 1931-2025; -35% since the Wainwright decade"
    },
    {
      "ref": "wwa-desmond",
      "title": "Storm Desmond brings heavy rain to the UK, December 2015",
      "publisher": "World Weather Attribution",
      "date": "16 Dec 2015 (peer-reviewed 2018)",
      "url": "https://www.worldweatherattribution.org/uks-storm-desmond-december-2015/",
      "supports": "Honister Pass 341.4 mm 24-hour UK record; previous record Seathwaite 316.4 mm (2009); attribution ~40% more likely (5-80% range)"
    },
    {
      "ref": "otto-2018",
      "title": "Climate change increases the probability of heavy rains like those of storm Desmond in the UK - an event attribution study in near-real time",
      "publisher": "Otto, F.E.L. et al., Environmental Research Letters",
      "date": "2018",
      "url": "https://iopscience.iop.org/article/10.1088/1748-9326/aa9663",
      "supports": "Peer-reviewed basis for the Desmond attribution result"
    },
    {
      "ref": "fixthefells",
      "title": "Fix the Fells appeal - caring for the Lake District's mountain paths",
      "publisher": "Fix the Fells (Lake District National Park / National Trust partnership)",
      "date": "accessed 3 Jul 2026",
      "url": "https://www.nationaltrust.org.uk/support-us/appeals/fix-the-fells-appeal",
      "supports": "\"630km of paths will need to be repaired within the next 10 years\" (verified verbatim on the Fix the Fells appeal page, 3 Jul 2026); erosion from footfall + extreme weather on thin upland soils. The ~GBP 650,000/year running-cost figure is a stated programme estimate, not confirmed verbatim on this page."
    },
    {
      "ref": "chiverrell-2019",
      "title": "Using lake sediment archives to improve understanding of flood magnitude and frequency: recent extreme flooding in northwest UK",
      "publisher": "Chiverrell, R.C. et al., Earth Surface Processes and Landforms",
      "date": "2019",
      "url": "https://doi.org/10.1002/esp.4650",
      "supports": "Lake-sediment flood record (Bassenthwaite): the 2009 and 2015 NW England floods among the largest in roughly 550 years of record. (Primary abstract paywalled; finding + citation confirmed via the study's press coverage and DOI, 3 Jul 2026. The separate '1-in-1300-year' Honister figure was NOT confirmed to this study and is deliberately omitted.)"
    },
    {
      "ref": "ldnpa-climate",
      "title": "Climate action in the Lake District",
      "publisher": "Lake District National Park Authority",
      "date": "accessed 3 Jul 2026",
      "url": "https://lakedistrict.gov.uk/caringfor/climate-action-in-the-lake-district",
      "supports": "The Park Authority treats climate change as the single biggest long-term driver of change facing the Lake District (substance verified; paraphrased, not quoted verbatim)"
    },
    {
      "ref": "ukceh-lakes",
      "title": "Lakes in hot water: warming trend revealed in eight decades of Cumbrian lake temperature records",
      "publisher": "UK Centre for Ecology & Hydrology",
      "date": "accessed 2 Jul 2026",
      "url": "https://www.ceh.ac.uk/news-and-media/blogs/lakes-hot-water-warming-trend-revealed-eight-decades-cumbrian-lake-temperature",
      "supports": "Windermere temperature deviations for both basins against a 1981-2010 baseline; the five warmest years in each basin all since 2000, two since 2014. No degree figure is stated in this article."
    },
    {
      "ref": "ukcp18",
      "title": "UKCP18 headline findings (land)",
      "publisher": "Met Office (UK Climate Projections 2018)",
      "date": "v4.0, 3 Aug 2022",
      "url": "https://www.metoffice.gov.uk/research/approach/collaboration/ukcp/summaries-headline-findings",
      "supports": "By 2070 under high emissions, UK-average, 10%-90% probability levels: winter warming 0.6-3.8 C and precipitation -3% to +39%; summer warming 1.3-5.1 C and precipitation -45% to +5% (sections 3.1.2, 3.2.2)"
    },
    {
      "ref": "state-of-uk-climate",
      "title": "State of the UK Climate",
      "publisher": "Met Office / RMetS (Int. J. Climatology)",
      "date": "annual",
      "url": "https://www.metoffice.gov.uk/research/climate/maps-and-data/about/state-of-climate",
      "supports": "National context on declining lying snow and air frost (the national statement) — confirm the exact latest figure at build time"
    }
  ]
}