{
 "meta": {
  "api_version": "1.4.1",
  "generated": "2026-10-04",
  "notice": "Screening-level results from terrain, inventory and index-map evidence only. Natural hazards are read from federal index maps, not assessed on site; geology is not assessed. Not a basis for engineering or investment decisions without a feasibility study.",
  "docs": "https://gopalinternship-unibasel.github.io/basinscope-alps/api/"
 },
 "data": {
  "snow_and_ice_at_end_of_summer": {
   "product": "swissEO S2-SR v200, swisstopo (Copernicus Sentinel-2)",
   "study_area_km2": 783.5,
   "method": "NDSI >= 0.4 on a 40 m grid inside the study area, clear pixels only, persistent water taken out. Per year: the clear scene between 10 August and 5 October with the least snow and ice that a second scene confirms within 5 per cent. Misses debris-covered ice and ice in deep shadow, includes snow fields outside the glaciers.",
   "mosaics_screened": 244,
   "mosaics_measured": 46,
   "years": [
    {
     "year": 2015,
     "scene": "2015-08-29t103026",
     "date": "2015-08-29",
     "snow_and_ice_km2": 276.9,
     "under_cloud_km2": 1.5,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 2,
     "passes": 7
    },
    {
     "year": 2016,
     "scene": "2016-08-23t103022",
     "date": "2016-08-23",
     "snow_and_ice_km2": 301.8,
     "under_cloud_km2": 0.0,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 2,
     "passes": 12
    },
    {
     "year": 2017,
     "scene": null,
     "clear_scenes": 0,
     "passes": 18
    },
    {
     "year": 2018,
     "scene": "2018-08-28t103019",
     "date": "2018-08-28",
     "snow_and_ice_km2": 279.7,
     "under_cloud_km2": 0.0,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 3,
     "passes": 22
    },
    {
     "year": 2019,
     "scene": "2019-09-04t102021",
     "date": "2019-09-04",
     "snow_and_ice_km2": 257.8,
     "under_cloud_km2": 0.0,
     "confirmed_by_second_scene": false,
     "partly_cloudy": false,
     "clear_scenes": 4,
     "passes": 21
    },
    {
     "year": 2020,
     "scene": "2020-09-08t102031",
     "date": "2020-09-08",
     "snow_and_ice_km2": 268.8,
     "under_cloud_km2": 6.2,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 2,
     "passes": 21
    },
    {
     "year": 2021,
     "scene": "2021-08-14t102031",
     "date": "2021-08-14",
     "snow_and_ice_km2": 312.7,
     "under_cloud_km2": 4.0,
     "confirmed_by_second_scene": false,
     "partly_cloudy": false,
     "clear_scenes": 2,
     "passes": 21
    },
    {
     "year": 2022,
     "scene": "2022-08-24t101559",
     "date": "2022-08-24",
     "snow_and_ice_km2": 213.6,
     "under_cloud_km2": 6.0,
     "confirmed_by_second_scene": false,
     "partly_cloudy": false,
     "clear_scenes": 2,
     "passes": 19
    },
    {
     "year": 2023,
     "scene": "2023-09-06t102601",
     "date": "2023-09-06",
     "snow_and_ice_km2": 240.1,
     "under_cloud_km2": 0.0,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 4,
     "passes": 18
    },
    {
     "year": 2024,
     "scene": "2024-08-31t103021",
     "date": "2024-08-31",
     "snow_and_ice_km2": 238.2,
     "under_cloud_km2": 8.0,
     "confirmed_by_second_scene": false,
     "partly_cloudy": true,
     "clear_scenes": 0,
     "passes": 22
    },
    {
     "year": 2025,
     "scene": "2025-08-26t103051",
     "date": "2025-08-26",
     "snow_and_ice_km2": 237.7,
     "under_cloud_km2": 2.9,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 7,
     "passes": 31
    },
    {
     "year": 2026,
     "scene": "2026-09-27t101801",
     "date": "2026-09-27",
     "snow_and_ice_km2": 204.8,
     "under_cloud_km2": 0.0,
     "confirmed_by_second_scene": true,
     "partly_cloudy": false,
     "clear_scenes": 7,
     "passes": 32
    }
   ]
  },
  "scene_pair": {
   "then": {
    "scene": "2016-09-29t102022",
    "date": "2016-09-29",
    "snow_and_ice_km2": 309.4,
    "under_cloud_km2": 0.0
   },
   "now": {
    "scene": "2026-09-27t101801",
    "date": "2026-09-27",
    "snow_and_ice_km2": 204.8,
    "under_cloud_km2": 0.0
   },
   "pictures": {
    "study_area": [
     "https://gopalinternship-unibasel.github.io/basinscope-alps/assets/sat/area_then.webp",
     "https://gopalinternship-unibasel.github.io/basinscope-alps/assets/sat/area_now.webp"
    ],
    "site": "https://gopalinternship-unibasel.github.io/basinscope-alps/assets/sat/s{site id}_then.webp and s{site id}_now.webp, 4 km square at 10 m per pixel",
    "study_area_box_lv95": [
     2619000.0,
     1132000.0,
     2666000.0,
     1170000.0
    ]
   }
  },
  "glacier_thinning": {
   "source": "Hugonnet et al. 2021, Nature 592, doi:10.1038/s41586-021-03436-z: elevation change from ASTER satellite stereo pictures, on Randolph Glacier Inventory 6.0 outlines",
   "glaciers_with_centre_in_study_area": 367,
   "outline_year": 2003,
   "study_area": [
    {
     "period": "2000-2009",
     "glaciers_measured": 318,
     "area_km2": 338.5,
     "mass_change_m_water_per_year": -1.05,
     "surface_change_m_per_year": -1.23,
     "net_water_loss_mio_m3_per_year": 355
    },
    {
     "period": "2010-2019",
     "glaciers_measured": 318,
     "area_km2": 338.5,
     "mass_change_m_water_per_year": -1.05,
     "surface_change_m_per_year": -1.24,
     "net_water_loss_mio_m3_per_year": 357
    },
    {
     "period": "2000-2019",
     "glaciers_measured": 318,
     "area_km2": 338.5,
     "mass_change_m_water_per_year": -1.05,
     "surface_change_m_per_year": -1.24,
     "net_water_loss_mio_m3_per_year": 356
    }
   ],
   "glaciers": [
    {
     "name": "Grosser Aletschgletscher",
     "rgi_id": "RGI60-11.01450",
     "rgi_area_km2": 82.2,
     "surface_change_m_per_year": -1.42,
     "uncertainty_m_per_year": 0.1,
     "mass_change_m_water_per_year": -1.21,
     "mass_uncertainty_m_water_per_year": 0.13,
     "surface_change_2000_2009": -1.4,
     "surface_change_2010_2019": -1.45,
     "shares_rgi_outline": false
    },
    {
     "name": "Fieschergletscher E",
     "rgi_id": "RGI60-11.01478",
     "rgi_area_km2": 31.3,
     "surface_change_m_per_year": -1.26,
     "uncertainty_m_per_year": 0.11,
     "mass_change_m_water_per_year": -1.07,
     "mass_uncertainty_m_water_per_year": 0.14,
     "surface_change_2000_2009": -1.21,
     "surface_change_2010_2019": -1.31,
     "shares_rgi_outline": false
    },
    {
     "name": "Unteraargletscher",
     "rgi_id": "RGI60-11.01328",
     "rgi_area_km2": 23.8,
     "surface_change_m_per_year": -1.87,
     "uncertainty_m_per_year": 0.12,
     "mass_change_m_water_per_year": -1.59,
     "mass_uncertainty_m_water_per_year": 0.2,
     "surface_change_2000_2009": -1.82,
     "surface_change_2010_2019": -1.92,
     "shares_rgi_outline": false
    },
    {
     "name": "Oberaletschgletscher",
     "rgi_id": "RGI60-11.01827",
     "rgi_area_km2": 19.3,
     "surface_change_m_per_year": -1.67,
     "uncertainty_m_per_year": 0.12,
     "mass_change_m_water_per_year": -1.42,
     "mass_uncertainty_m_water_per_year": 0.21,
     "surface_change_2000_2009": -1.66,
     "surface_change_2010_2019": -1.68,
     "shares_rgi_outline": false
    },
    {
     "name": "Kanderfirn N",
     "rgi_id": "RGI60-11.01702",
     "rgi_area_km2": 13.2,
     "surface_change_m_per_year": -1.35,
     "uncertainty_m_per_year": 0.13,
     "mass_change_m_water_per_year": -1.15,
     "mass_uncertainty_m_water_per_year": 0.15,
     "surface_change_2000_2009": -1.42,
     "surface_change_2010_2019": -1.28,
     "shares_rgi_outline": false
    },
    {
     "name": "Gauligletscher",
     "rgi_id": "RGI60-11.01275",
     "rgi_area_km2": 12.7,
     "surface_change_m_per_year": -1.21,
     "uncertainty_m_per_year": 0.13,
     "mass_change_m_water_per_year": -1.02,
     "mass_uncertainty_m_water_per_year": 0.15,
     "surface_change_2000_2009": -1.09,
     "surface_change_2010_2019": -1.32,
     "shares_rgi_outline": false
    },
    {
     "name": "Unterer Grindelwaldgletscher",
     "rgi_id": "RGI60-11.01346",
     "rgi_area_km2": 18.8,
     "surface_change_m_per_year": -1.17,
     "uncertainty_m_per_year": 0.12,
     "mass_change_m_water_per_year": -0.99,
     "mass_uncertainty_m_water_per_year": 0.15,
     "surface_change_2000_2009": -1.36,
     "surface_change_2010_2019": -0.98,
     "shares_rgi_outline": true
    },
    {
     "name": "Oberer Grindelwaldgletscher",
     "rgi_id": "RGI60-11.01270",
     "rgi_area_km2": 9.0,
     "surface_change_m_per_year": -0.7,
     "uncertainty_m_per_year": 0.14,
     "mass_change_m_water_per_year": -0.59,
     "mass_uncertainty_m_water_per_year": 0.13,
     "surface_change_2000_2009": -0.75,
     "surface_change_2010_2019": -0.65,
     "shares_rgi_outline": false
    },
    {
     "name": "Langgletscher",
     "rgi_id": "RGI60-11.01698",
     "rgi_area_km2": 9.4,
     "surface_change_m_per_year": -1.19,
     "uncertainty_m_per_year": 0.13,
     "mass_change_m_water_per_year": -1.01,
     "mass_uncertainty_m_water_per_year": 0.16,
     "surface_change_2000_2009": -1.36,
     "surface_change_2010_2019": -1.01,
     "shares_rgi_outline": false
    },
    {
     "name": "Obers Ischmeer E",
     "rgi_id": "RGI60-11.01346",
     "rgi_area_km2": 18.8,
     "surface_change_m_per_year": -1.17,
     "uncertainty_m_per_year": 0.12,
     "mass_change_m_water_per_year": -0.99,
     "mass_uncertainty_m_water_per_year": 0.15,
     "surface_change_2000_2009": -1.36,
     "surface_change_2010_2019": -0.98,
     "shares_rgi_outline": true
    }
   ]
  }
 }
}