{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:06.182355", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2020-Aug-28_to_2020-Sep-02_1.5_42.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2020080000900}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 28 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 377838.7455871564}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Andorra", "France", "Spain"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Balearic (Iberian Sea)", "Bay of Biscay"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 42.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 361.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 350.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 363.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.0, 44.25], [-7.47, 44.03], [-7.25, 43.5], [-7.47, 42.97], [-8.0, 42.75], [-8.53, 42.97], [-8.75, 43.5], [-8.53, 44.03], [-8.0, 44.25]]]]}, "2020-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.75, 43.0], [-9.53, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.68, 43.68], [-8.53, 44.03], [-8.0, 44.25], [-7.47, 44.03], [-7.32, 43.68], [-7.25, 43.65], [-7.0, 43.75], [-6.75, 43.65], [-6.68, 43.68], [-6.53, 44.03], [-6.0, 44.25], [-5.75, 44.15], [-5.5, 44.25], [-4.97, 44.03], [-4.82, 43.68], [-4.75, 43.65], [-4.68, 43.68], [-4.53, 44.03], [-4.0, 44.25], [-3.75, 44.15], [-3.5, 44.25], [-2.97, 44.03], [-2.82, 43.68], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.0, 43.75], [-1.75, 43.65], [-1.68, 43.68], [-1.65, 43.75], [-1.75, 44.0], [-1.53, 44.53], [-1.0, 44.75], [-0.75, 44.65], [-0.5, 44.75], [-0.25, 44.65], [0.0, 44.75], [0.53, 44.53], [0.75, 44.0], [0.65, 43.75], [0.68, 43.68], [1.03, 43.53], [1.18, 43.18], [1.25, 43.15], [1.32, 43.18], [1.47, 43.53], [1.82, 43.68], [1.97, 44.03], [2.5, 44.25], [3.03, 44.03], [3.18, 43.68], [3.53, 43.53], [3.75, 43.0], [3.65, 42.75], [3.75, 42.5], [3.65, 42.25], [3.75, 42.0], [3.54, 41.5], [3.75, 41.0], [3.65, 40.75], [3.75, 40.5], [3.53, 39.97], [3.0, 39.75], [2.75, 39.85], [2.68, 39.82], [2.53, 39.47], [2.0, 39.25], [1.75, 39.35], [1.68, 39.32], [1.53, 38.97], [1.0, 38.75], [0.47, 38.97], [0.25, 39.5], [0.35, 39.75], [0.32, 39.82], [0.25, 39.85], [0.18, 39.82], [0.03, 39.47], [-0.32, 39.32], [-0.47, 38.97], [-1.0, 38.75], [-1.53, 38.97], [-1.68, 39.32], [-1.75, 39.35], [-1.82, 39.32], [-1.85, 39.25], [-1.75, 39.0], [-1.97, 38.47], [-2.5, 38.25], [-2.75, 38.35], [-3.0, 38.25], [-3.25, 38.35], [-3.5, 38.25], [-3.75, 38.35], [-4.0, 38.25], [-4.53, 38.47], [-4.68, 38.82], [-5.03, 38.97], [-5.18, 39.32], [-5.25, 39.35], [-5.5, 39.25], [-6.03, 39.47], [-6.25, 40.0], [-6.04, 40.5], [-6.18, 40.82], [-6.53, 40.97], [-6.68, 41.32], [-7.03, 41.47], [-7.25, 42.0], [-7.15, 42.25], [-7.18, 42.32], [-7.25, 42.35], [-7.5, 42.25], [-7.75, 42.35], [-7.82, 42.32], [-7.97, 41.97], [-8.5, 41.75], [-9.03, 41.97], [-9.18, 42.32], [-9.53, 42.47], [-9.75, 43.0]]]]}, "2020-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.75, 43.0], [-9.53, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.68, 43.68], [-8.53, 44.03], [-8.0, 44.25], [-7.47, 44.03], [-7.32, 43.68], [-7.25, 43.65], [-7.0, 43.75], [-6.75, 43.65], [-6.68, 43.68], [-6.53, 44.03], [-6.0, 44.25], [-5.75, 44.15], [-5.5, 44.25], [-4.97, 44.03], [-4.82, 43.68], [-4.75, 43.65], [-4.68, 43.68], [-4.53, 44.03], [-4.0, 44.25], [-3.75, 44.15], [-3.5, 44.25], [-2.97, 44.03], [-2.82, 43.68], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.0, 43.75], [-1.75, 43.65], [-1.68, 43.68], [-1.65, 43.75], [-1.75, 44.0], [-1.53, 44.53], [-1.0, 44.75], [-0.75, 44.65], [-0.5, 44.75], [-0.25, 44.65], [0.0, 44.75], [0.53, 44.53], [0.75, 44.0], [0.65, 43.75], [0.68, 43.68], [1.03, 43.53], [1.18, 43.18], [1.25, 43.15], [1.32, 43.18], [1.47, 43.53], [1.82, 43.68], [1.97, 44.03], [2.5, 44.25], [3.03, 44.03], [3.18, 43.68], [3.53, 43.53], [3.75, 43.0], [3.65, 42.75], [3.75, 42.5], [3.65, 42.25], [3.75, 42.0], [3.54, 41.5], [3.75, 41.0], [3.65, 40.75], [3.75, 40.5], [3.53, 39.97], [3.0, 39.75], [2.75, 39.85], [2.68, 39.82], [2.53, 39.47], [2.13, 39.3], [2.25, 39.0], [2.03, 38.47], [1.5, 38.25], [0.97, 38.47], [0.82, 38.82], [0.47, 38.97], [0.3, 39.38], [0.18, 39.32], [0.04, 39.0], [0.25, 38.5], [0.03, 37.97], [-0.32, 37.82], [-0.47, 37.47], [-1.0, 37.25], [-1.25, 37.35], [-1.32, 37.32], [-1.47, 36.97], [-1.82, 36.82], [-1.97, 36.47], [-2.5, 36.25], [-3.03, 36.47], [-3.25, 37.0], [-3.03, 37.53], [-2.68, 37.68], [-2.65, 37.75], [-2.75, 38.0], [-2.65, 38.25], [-2.68, 38.32], [-2.75, 38.35], [-3.0, 38.25], [-3.25, 38.35], [-3.5, 38.25], [-3.75, 38.35], [-4.0, 38.25], [-4.53, 38.47], [-4.68, 38.82], [-5.03, 38.97], [-5.18, 39.32], [-5.25, 39.35], [-5.5, 39.25], [-6.03, 39.47], [-6.25, 40.0], [-6.04, 40.5], [-6.18, 40.82], [-6.53, 40.97], [-6.68, 41.32], [-7.03, 41.47], [-7.25, 42.0], [-7.15, 42.25], [-7.18, 42.32], [-7.25, 42.35], [-7.5, 42.25], [-7.75, 42.35], [-7.82, 42.32], [-7.97, 41.97], [-8.5, 41.75], [-9.03, 41.97], [-9.18, 42.32], [-9.53, 42.47], [-9.75, 43.0]], [[-1.62, 39.2], [-1.68, 39.32], [-1.75, 39.35], [-1.82, 39.32], [-1.85, 39.25], [-1.82, 39.18], [-1.75, 39.15], [-1.62, 39.2]]]]}, "2020-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.75, 43.0], [-9.53, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.5, 43.75], [-8.25, 43.65], [-8.0, 43.75], [-7.75, 43.65], [-7.5, 43.75], [-7.25, 43.65], [-7.0, 43.75], [-6.75, 43.65], [-6.68, 43.68], [-6.53, 44.03], [-6.0, 44.25], [-5.75, 44.15], [-5.5, 44.25], [-4.97, 44.03], [-4.82, 43.68], [-4.75, 43.65], [-4.68, 43.68], [-4.53, 44.03], [-4.0, 44.25], [-3.75, 44.15], [-3.5, 44.25], [-2.97, 44.03], [-2.82, 43.68], [-2.75, 43.65], [-2.5, 43.75], [-2.25, 43.65], [-2.0, 43.75], [-1.75, 43.65], [-1.68, 43.68], [-1.65, 43.75], [-1.75, 44.0], [-1.53, 44.53], [-1.0, 44.75], [-0.75, 44.65], [-0.5, 44.75], [-0.25, 44.65], [0.0, 44.75], [0.53, 44.53], [0.75, 44.0], [0.65, 43.75], [0.68, 43.68], [1.03, 43.53], [1.18, 43.18], [1.25, 43.15], [1.32, 43.18], [1.47, 43.53], [1.82, 43.68], [1.97, 44.03], [2.5, 44.25], [3.03, 44.03], [3.18, 43.68], [3.53, 43.53], [3.75, 43.0], [3.65, 42.75], [3.75, 42.5], [3.65, 42.25], [3.75, 42.0], [3.54, 41.5], [3.75, 41.0], [3.65, 40.75], [3.75, 40.5], [3.53, 39.97], [3.0, 39.75], [2.75, 39.85], [2.68, 39.82], [2.53, 39.47], [2.13, 39.3], [2.25, 39.0], [2.03, 38.47], [1.5, 38.25], [0.97, 38.47], [0.82, 38.82], [0.47, 38.97], [0.3, 39.38], [0.18, 39.32], [0.04, 39.0], [0.25, 38.5], [0.03, 37.97], [-0.32, 37.82], [-0.47, 37.47], [-1.0, 37.25], [-1.25, 37.35], [-1.32, 37.32], [-1.47, 36.97], [-1.82, 36.82], [-1.97, 36.47], [-2.5, 36.25], [-3.03, 36.47], [-3.25, 37.0], [-3.03, 37.53], [-2.68, 37.68], [-2.65, 37.75], [-2.75, 38.0], [-2.65, 38.25], [-2.68, 38.32], [-2.75, 38.35], [-3.0, 38.25], [-3.25, 38.35], [-3.5, 38.25], [-3.75, 38.35], [-4.0, 38.25], [-4.53, 38.47], [-4.68, 38.82], [-5.03, 38.97], [-5.18, 39.32], [-5.25, 39.35], [-5.5, 39.25], [-6.03, 39.47], [-6.25, 40.0], [-6.04, 40.5], [-6.18, 40.82], [-6.53, 40.97], [-6.68, 41.32], [-7.03, 41.47], [-7.25, 42.0], [-7.15, 42.25], [-7.18, 42.32], [-7.25, 42.35], [-7.5, 42.25], [-7.75, 42.35], [-7.82, 42.32], [-7.97, 41.97], [-8.5, 41.75], [-9.03, 41.97], [-9.18, 42.32], [-9.53, 42.47], [-9.75, 43.0]], [[-1.62, 39.2], [-1.68, 39.32], [-1.75, 39.35], [-1.82, 39.32], [-1.85, 39.25], [-1.82, 39.18], [-1.75, 39.15], [-1.62, 39.2]]]]}, "2020-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 38.47], [0.75, 39.0], [0.97, 39.53], [1.5, 39.75], [2.03, 39.53], [2.25, 39.0], [2.03, 38.47], [1.5, 38.25], [0.97, 38.47]]], [[[-2.75, 38.5], [-2.53, 39.03], [-2.0, 39.25], [-1.75, 39.15], [-1.62, 39.2], [-1.75, 39.5], [-1.53, 40.03], [-1.18, 40.18], [-1.03, 40.53], [-0.68, 40.68], [-0.53, 41.03], [0.0, 41.25], [0.43, 41.07], [0.25, 41.5], [0.47, 42.03], [0.82, 42.18], [0.85, 42.25], [0.75, 42.5], [0.97, 43.03], [1.5, 43.25], [1.75, 43.15], [2.0, 43.25], [2.53, 43.03], [2.75, 42.5], [2.65, 42.25], [2.75, 42.0], [2.65, 41.75], [2.75, 41.5], [2.53, 40.97], [2.0, 40.75], [1.75, 40.85], [1.5, 40.75], [1.25, 40.85], [1.0, 40.75], [0.57, 40.93], [0.75, 40.5], [0.65, 40.25], [0.75, 40.0], [0.53, 39.47], [0.18, 39.32], [0.04, 39.0], [0.25, 38.5], [0.03, 37.97], [-0.32, 37.82], [-0.47, 37.47], [-1.0, 37.25], [-1.25, 37.35], [-1.32, 37.32], [-1.47, 36.97], [-1.82, 36.82], [-1.97, 36.47], [-2.5, 36.25], [-3.03, 36.47], [-3.25, 37.0], [-3.03, 37.53], [-2.68, 37.68], [-2.65, 37.75], [-2.75, 38.0], [-2.65, 38.25], [-2.75, 38.5]]], [[[-3.5, 41.25], [-3.25, 41.15], [-3.0, 41.25], [-2.75, 41.15], [-2.5, 41.25], [-1.97, 41.03], [-1.75, 40.5], [-1.97, 39.97], [-2.32, 39.82], [-2.47, 39.47], [-3.0, 39.25], [-3.53, 39.47], [-3.68, 39.82], [-4.03, 39.97], [-4.25, 40.5], [-4.03, 41.03], [-3.5, 41.25]]]]}, "2020-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.5, 37.75], [-1.97, 37.53], [-1.75, 37.0], [-1.97, 36.47], [-2.5, 36.25], [-3.03, 36.47], [-3.25, 37.0], [-3.03, 37.53], [-2.5, 37.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.463435143213758}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.76867391726821}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.278461777553844, 15.824141459233772, 15.31766994638076, 16.602850292053006, 18.776848574803523, 21.056017821154512]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.278461777553844, 6.833774813163416, 6.369425946938918, 7.58753412151907, 8.565360780349977, 21.056017821154512]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0365010840339437, -4.90274492118, -5.539859013506131, -4.125913316545152, -3.3425672336100414, -2.75894556529164]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0365010840339437, -7.163858592041436, -8.463435143213758, -6.3672277139854145, -4.473386712218712, -2.75894556529164]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3297736814295293, -2.0078085950266638, -2.293015611603455, -1.7412726719164802, -1.6550439872583842, -1.5466331799135395]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3297736814295293, -2.780891749868112, -2.931905715064034, -2.3265886621175764, -1.9663176968134455, -1.5466331799135395]}}