{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:29.426930", "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": "2021-Sep-19_to_2021-Sep-25_72.0_28.5"}, "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": 2021090000663}, "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": "September 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2021"}, "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": 133873.24962574235}, "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": ["India", "Pakistan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia"]}, "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": 28.5}, "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": 72.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "72.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 70.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 74.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[71.82, 26.32], [71.75, 26.35], [71.5, 26.25], [71.25, 26.35], [71.0, 26.25], [70.47, 26.47], [70.32, 26.82], [69.97, 26.97], 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"description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.97, 25.47], [71.75, 26.0], [71.97, 26.53], [72.5, 26.75], [72.75, 26.65], [73.0, 26.75], [73.25, 26.65], [73.5, 26.75], [73.75, 26.65], [74.0, 26.75], [74.53, 26.53], [74.75, 26.0], [74.53, 25.47], [74.18, 25.32], [74.03, 24.97], [73.5, 24.75], [73.25, 24.85], [73.0, 24.75], [72.47, 24.97], [72.32, 25.32], [71.97, 25.47]]]]}, "2021-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.75, 26.5], [71.97, 27.03], [72.5, 27.25], [72.75, 27.15], [73.0, 27.25], [73.53, 27.03], [73.68, 26.68], [73.75, 26.65], [74.0, 26.75], [74.53, 26.53], [74.75, 26.0], [74.53, 25.47], [74.18, 25.32], [74.03, 24.97], [73.5, 24.75], [73.25, 24.85], [73.0, 24.75], [72.47, 24.97], [72.32, 25.32], [71.97, 25.47], [71.75, 26.0], [71.85, 26.25], [71.75, 26.5]]]]}, "2021-09-21T11:30:00.000000000": {"type": 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t2m.", "value": [26.4459814333851, 26.707735417797664, 27.2585420279093, 27.42898208350516, 27.94101015074449, 28.186714229565382, 29.88109857767904]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.185484209791753, 25.80462554076655, 25.60668793343973, 26.44487396257, 26.213634056380272, 27.44714807929074, 29.734140457784292]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.818166526602558, -2.8144183971045464, -3.4774986965998576, -4.028422531804688, -3.5796174091040474, -3.267133485223897, -2.2776667109577104]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2180109550219527, -3.6007658631103254, -4.405812532217112, -4.955202906493923, -4.840444547999482, -4.237808802429015, -2.504501834988389]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6629015511532474, -1.49213270011104, -1.7113455572764336, -1.9928233464584528, -1.8385166425614308, -1.770943626381501, -1.3062766942313981]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0882126193749615, -1.6120292514688415, -2.066869392200217, -2.5041140002359423, -2.2303560408789775, -2.300598266029627, -1.414832292283772]}}