{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:40.718917", "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-Mar-15_to_2022-Mar-18_348.0_21.0"}, "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": 2022030000537}, "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": "March 15 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 18 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 129987.16050921124}, "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": ["Mauritania"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": []}, "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": 21.0}, "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": 348.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "348.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 346.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 351.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-13.0, 21.75], [-12.75, 21.65], [-12.5, 21.75], [-12.25, 21.65], [-12.18, 21.68], [-12.03, 22.03], [-11.68, 22.18], [-11.53, 22.53], [-11.0, 22.75], [-10.75, 22.65], [-10.68, 22.68], [-10.53, 23.03], [-10.0, 23.25], [-9.75, 23.15], [-9.5, 23.25], [-9.25, 23.15], [-9.0, 23.25], [-8.75, 23.15], [-8.5, 23.25], [-7.97, 23.03], [-7.75, 22.5], [-7.97, 21.97], [-8.32, 21.82], [-8.47, 21.47], [-8.82, 21.32], [-8.85, 21.25], [-8.75, 21.0], [-8.85, 20.75], [-8.75, 20.5], [-8.97, 19.97], [-9.32, 19.82], [-9.47, 19.47], [-9.82, 19.32], [-9.97, 18.97], [-10.32, 18.82], [-10.47, 18.47], [-11.0, 18.25], [-11.53, 18.47], [-11.68, 18.82], [-11.75, 18.85], [-12.0, 18.75], [-12.25, 18.85], [-12.5, 18.75], [-13.03, 18.97], [-13.18, 19.32], [-13.25, 19.35], [-13.5, 19.25], [-14.03, 19.47], [-14.18, 19.82], [-14.53, 19.97], [-14.75, 20.5], [-14.53, 21.03], [-14.18, 21.18], [-14.03, 21.53], [-13.5, 21.75], [-13.25, 21.65], [-13.0, 21.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.529999999999973, 19.97], [-14.75, 20.5], [-14.529999999999973, 21.03], [-14.180000000000007, 21.18], [-14.029999999999973, 21.53], [-13.5, 21.75], [-13.25, 21.65], [-13.0, 21.75], [-12.75, 21.65], [-12.5, 21.75], [-12.25, 21.65], [-12.180000000000007, 21.68], [-12.029999999999973, 22.03], [-11.680000000000007, 22.18], [-11.529999999999973, 22.53], [-11.0, 22.75], [-10.75, 22.65], [-10.680000000000007, 22.68], [-10.529999999999973, 23.03], [-10.0, 23.25], [-9.75, 23.15], [-9.5, 23.25], [-9.25, 23.15], [-9.0, 23.25], [-8.75, 23.15], [-8.5, 23.25], [-7.970000000000027, 23.03], [-7.75, 22.5], [-7.970000000000027, 21.97], [-8.319999999999993, 21.82], [-8.470000000000027, 21.47], [-8.819999999999993, 21.32], [-8.970000000000027, 20.97], [-9.5, 20.75], [-9.75, 20.85], [-10.0, 20.75], [-10.25, 20.85], [-10.319999999999993, 20.82], 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17.563754144658276, 18.326933438857793]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.284113863598088, -4.53027451493605, -4.159982522028384, -3.9328201195658075]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.228793457962581, -5.379229138364167, -4.772684529011883, -4.574709153282242]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.558041048519087, -1.6631402886979256, -1.531191829382431, -1.4646264038348853]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.930054079998964, -1.861756073786652, -1.633272016544136, -1.5442710040943501]}}