{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:02.180752", "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": "2022-Jun-21_to_2022-Jun-27_340.0_65.0"}, "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": 2022060000944}, "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": "June 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 27 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 98590.15627846583}, "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": ["Iceland"]}, "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": ["Atlantic Ocean", "Greenland Sea"]}, "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": 65.0}, "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": 340.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "340.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 337.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 346.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-22.65, 64.25], [-22.68, 64.32], [-23.03, 64.47], [-23.18, 64.82], [-23.53, 64.97], [-23.75, 65.5], [-23.65, 65.75], [-23.75, 66.0], [-23.53, 66.53], [-23.0, 66.75], [-22.75, 66.65], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.75, 66.65], [-21.5, 66.75], [-21.0, 66.54], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.75, 66.65], [-17.5, 66.75], [-17.25, 66.65], [-17.18, 66.68], [-17.03, 67.03], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.5, 67.25], [-14.97, 67.03], [-14.82, 66.68], [-14.47, 66.53], [-14.25, 66.0], [-14.35, 65.75], [-14.32, 65.68], [-14.25, 65.65], [-14.0, 65.75], [-13.47, 65.53], [-13.25, 65.0], [-13.47, 64.47], [-14.0, 64.25], [-14.25, 64.35], [-14.5, 64.25], [-14.75, 64.35], [-14.82, 64.32], [-14.97, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-16.0, 63.75], [-16.25, 63.85], [-16.5, 63.75], [-16.75, 63.85], [-17.0, 63.75], [-17.25, 63.85], [-17.5, 63.75], [-17.75, 63.85], [-17.82, 63.82], [-17.97, 63.47], [-18.5, 63.25], [-18.75, 63.35], [-19.0, 63.25], [-19.25, 63.35], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.53, 63.47], [-22.75, 64.0], [-22.65, 64.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.529999999999973, 64.53], [-22.0, 64.75], [-21.75, 64.65], [-21.5, 64.75], [-21.25, 64.65], [-21.0, 64.75], [-20.470000000000027, 64.53], [-20.25, 64.0], [-20.470000000000027, 63.47], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25]]]]}, "2022-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 64.97], [-23.75, 65.5], [-23.529999999999973, 66.03], [-23.180000000000007, 66.18], [-23.029999999999973, 66.53], [-22.5, 66.75], [-21.970000000000027, 66.53], [-21.819999999999993, 66.18], [-21.470000000000027, 66.03], [-21.319999999999993, 65.68], [-21.25, 65.65], [-21.0, 65.75], [-20.75, 65.65], [-20.680000000000007, 65.68], [-20.529999999999973, 66.03], [-20.0, 66.25], [-19.75, 66.15], [-19.5, 66.25], [-19.25, 66.15], [-19.0, 66.25], [-18.75, 66.15], [-18.5, 66.25], [-17.970000000000027, 66.03], [-17.75, 65.5], [-17.930000000000007, 65.07], [-17.5, 65.25], [-16.970000000000027, 65.03], [-16.75, 64.5], [-16.970000000000027, 63.97], [-17.5, 63.75], [-18.029999999999973, 63.97], [-18.25, 64.5], [-18.470000000000027, 63.97], [-18.819999999999993, 63.82], [-18.970000000000027, 63.47], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.180000000000007, 64.82], [-23.529999999999973, 64.97]], [[-18.069999999999993, 64.93], [-18.319999999999993, 64.82], [-18.350000000000023, 64.75], [-18.25, 64.5], [-18.069999999999993, 64.93]]]]}, "2022-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 64.97], [-23.75, 65.5], [-23.529999999999973, 66.03], [-23.180000000000007, 66.18], [-23.029999999999973, 66.53], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.470000000000027, 66.53], [-21.319999999999993, 66.18], [-21.25, 66.15], [-21.180000000000007, 66.18], [-21.029999999999973, 66.53], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.75, 66.65], [-17.5, 66.75], [-17.25, 66.65], [-17.180000000000007, 66.68], [-17.029999999999973, 67.03], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.470000000000027, 67.03], [-15.319999999999993, 66.68], [-15.25, 66.65], [-15.0, 66.75], [-14.470000000000027, 66.53], [-14.25, 66.0], [-14.350000000000023, 65.75], [-14.319999999999993, 65.68], [-13.970000000000027, 65.53], [-13.75, 65.0], [-13.970000000000027, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-14.819999999999993, 64.32], [-14.970000000000027, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-16.0, 63.75], [-16.25, 63.85], [-16.5, 63.75], [-16.75, 63.85], [-17.0, 63.75], [-17.25, 63.85], [-17.5, 63.75], [-17.75, 63.85], [-17.819999999999993, 63.82], [-17.970000000000027, 63.47], [-18.5, 63.25], [-18.75, 63.35], [-19.0, 63.25], [-19.25, 63.35], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.180000000000007, 64.82], [-23.529999999999973, 64.97]]]]}, "2022-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 64.97], [-23.75, 65.5], [-23.529999999999973, 66.03], [-23.180000000000007, 66.18], [-23.029999999999973, 66.53], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.470000000000027, 66.53], [-21.319999999999993, 66.18], [-21.25, 66.15], [-21.180000000000007, 66.18], [-21.029999999999973, 66.53], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.75, 66.65], [-17.5, 66.75], [-17.25, 66.65], [-17.180000000000007, 66.68], [-17.029999999999973, 67.03], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.5, 67.25], [-14.970000000000027, 67.03], [-14.819999999999993, 66.68], [-14.470000000000027, 66.53], [-14.25, 66.0], [-14.350000000000023, 65.75], [-14.319999999999993, 65.68], [-14.25, 65.65], [-14.0, 65.75], [-13.470000000000027, 65.53], [-13.25, 65.0], [-13.470000000000027, 64.47], [-14.0, 64.25], [-14.25, 64.35], [-14.5, 64.25], [-14.75, 64.35], [-14.819999999999993, 64.32], [-14.970000000000027, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-16.0, 63.75], [-16.25, 63.85], [-16.5, 63.75], [-16.75, 63.85], [-17.0, 63.75], [-17.25, 63.85], [-17.5, 63.75], [-17.75, 63.85], [-17.819999999999993, 63.82], [-17.970000000000027, 63.47], [-18.5, 63.25], [-18.75, 63.35], [-19.0, 63.25], [-19.25, 63.35], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.180000000000007, 64.82], [-23.529999999999973, 64.97]]]]}, "2022-06-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 65.47], [-23.75, 66.0], [-23.529999999999973, 66.53], [-23.0, 66.75], [-22.75, 66.65], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.75, 66.65], [-21.5, 66.75], [-21.0, 66.54], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.75, 66.65], [-17.5, 66.75], [-17.25, 66.65], [-17.180000000000007, 66.68], [-17.029999999999973, 67.03], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.5, 67.25], [-14.970000000000027, 67.03], [-14.819999999999993, 66.68], [-14.470000000000027, 66.53], [-14.25, 66.0], [-14.350000000000023, 65.75], [-14.319999999999993, 65.68], [-14.25, 65.65], [-14.0, 65.75], [-13.470000000000027, 65.53], [-13.25, 65.0], [-13.470000000000027, 64.47], [-14.0, 64.25], [-14.25, 64.35], [-14.5, 64.25], [-14.75, 64.35], [-14.819999999999993, 64.32], [-14.970000000000027, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-16.0, 63.75], [-16.25, 63.85], [-16.5, 63.75], [-16.75, 63.85], [-17.0, 63.75], [-17.25, 63.85], [-17.5, 63.75], [-17.75, 63.85], [-17.819999999999993, 63.82], [-17.970000000000027, 63.47], [-18.5, 63.25], [-18.75, 63.35], [-19.0, 63.25], [-19.25, 63.35], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.25, 65.0], [-23.120000000000005, 65.3], [-23.529999999999973, 65.47]]]]}, "2022-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 65.47], [-23.75, 66.0], [-23.529999999999973, 66.53], [-23.0, 66.75], [-22.75, 66.65], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.75, 66.65], [-21.5, 66.75], [-21.0, 66.54], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.75, 66.65], [-17.5, 66.75], [-17.25, 66.65], [-17.180000000000007, 66.68], [-17.029999999999973, 67.03], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.5, 67.25], [-14.970000000000027, 67.03], [-14.819999999999993, 66.68], [-14.470000000000027, 66.53], [-14.25, 66.0], [-14.350000000000023, 65.75], [-14.319999999999993, 65.68], [-14.25, 65.65], [-14.0, 65.75], [-13.470000000000027, 65.53], [-13.25, 65.0], [-13.470000000000027, 64.47], [-14.0, 64.25], [-14.25, 64.35], [-14.5, 64.25], [-14.75, 64.35], [-14.819999999999993, 64.32], [-14.970000000000027, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-16.0, 63.75], [-16.25, 63.85], [-16.5, 63.75], [-16.75, 63.85], [-17.0, 63.75], [-17.25, 63.85], [-17.5, 63.75], [-17.75, 63.85], [-17.819999999999993, 63.82], [-17.970000000000027, 63.47], [-18.5, 63.25], [-18.75, 63.35], [-19.0, 63.25], [-19.25, 63.35], [-19.5, 63.25], [-19.75, 63.35], [-20.0, 63.25], [-20.25, 63.35], [-20.5, 63.25], [-20.75, 63.35], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.25, 65.0], [-23.120000000000005, 65.3], [-23.529999999999973, 65.47]]]]}, "2022-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.529999999999973, 65.47], [-23.75, 66.0], [-23.529999999999973, 66.53], [-23.0, 66.75], [-22.75, 66.65], [-22.5, 66.75], [-22.25, 66.65], [-22.0, 66.75], [-21.75, 66.65], [-21.5, 66.75], [-20.970000000000027, 66.53], [-20.75, 66.0], [-20.850000000000023, 65.75], [-20.819999999999993, 65.68], [-20.75, 65.65], [-20.680000000000007, 65.68], [-20.529999999999973, 66.03], [-20.0, 66.25], [-19.75, 66.15], [-19.680000000000007, 66.18], [-19.529999999999973, 66.53], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-17.970000000000027, 66.53], [-17.819999999999993, 66.18], [-17.75, 66.15], [-17.680000000000007, 66.18], [-17.529999999999973, 66.53], [-17.0, 66.75], [-16.75, 66.65], [-16.5, 66.75], [-16.25, 66.65], [-16.0, 66.75], [-15.75, 66.65], [-15.5, 66.75], [-14.970000000000027, 66.53], [-14.819999999999993, 66.18], [-14.470000000000027, 66.03], [-14.25, 65.5], [-14.350000000000023, 65.25], [-14.25, 65.0], [-14.470000000000027, 64.47], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.5, 64.25], [-17.75, 64.35], [-18.0, 64.25], [-18.25, 64.35], [-18.5, 64.25], [-18.75, 64.35], [-19.0, 64.25], [-19.25, 64.35], [-19.5, 64.25], [-19.75, 64.35], [-20.0, 64.25], [-20.25, 64.35], [-20.5, 64.25], [-20.75, 64.35], [-20.819999999999993, 64.32], [-20.970000000000027, 63.97], [-21.319999999999993, 63.82], [-21.470000000000027, 63.47], [-22.0, 63.25], [-22.529999999999973, 63.47], [-22.75, 64.0], [-22.649999999999977, 64.25], [-22.680000000000007, 64.32], [-23.029999999999973, 64.47], [-23.25, 65.0], [-23.120000000000005, 65.3], [-23.529999999999973, 65.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.096765858771789}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.546311926410426}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.105505188976963, 5.174765109535201, 2.931517534804982, 3.408655842174028, 3.2042888750404472, 2.983324287327548, 4.673733427964748]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.726341861456319, -1.9065131204974364, -4.697810555071953, -5.288556381406465, -4.901435305036671, -4.337917462509665, 1.9044684068125548]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.041089604163384, -3.1442657352417296, -4.713421835471962, -4.480778999762967, -4.811867347298176, -5.1436212661084255, -4.035421058266063]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.200432789940237, -4.124263432800319, -6.767737072130558, -6.931117755824744, -6.983679553678371, -7.096765858771789, -5.078953561514311]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4393037449823816, -1.656715706498393, -2.1774740961400605, -2.0300894834328878, -2.11913172398233, -2.268901398745037, -1.5674176873636894]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5207273350340662, -2.0924978849797586, -3.090741950574195, -2.645614628787314, -2.945279284756407, -3.264773236147988, -1.9294965230028127]}}