{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:13.969915", "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-Dec-20_to_2021-Dec-25_91.5_10.5"}, "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": 2021120000772}, "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": "December 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2021"}, "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": 126975.22072126604}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Andaman 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": 10.5}, "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": 91.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "91.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 90.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 94.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[90.25, 10.5], [90.46, 11.0], [90.25, 11.5], [90.47, 12.03], [90.82, 12.18], [90.85, 12.25], [90.75, 12.5], [90.97, 13.03], 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"Bay-of-Bengal"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.85, 12.25], [90.75, 12.5], [90.97, 13.03], [91.5, 13.25], [91.75, 13.15], [91.82, 13.18], [91.85, 13.25], [91.75, 13.5], [91.97, 14.03], [92.32, 14.18], [92.46, 14.5], [92.25, 15.0], [92.47, 15.53], [93.0, 15.75], [93.53, 15.53], [93.75, 15.0], [93.54, 14.5], [93.75, 14.0], [93.65, 13.75], [93.75, 13.5], [93.65, 13.25], [93.75, 13.0], [93.53, 12.47], [93.18, 12.32], [93.03, 11.97], [92.5, 11.75], [92.25, 11.85], [92.18, 11.82], [92.03, 11.47], [91.68, 11.32], [91.53, 10.97], [91.0, 10.75], [90.47, 10.97], [90.25, 11.5], [90.47, 12.03], [90.82, 12.18], [90.85, 12.25]]]]}, "2021-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.85, 12.25], [90.75, 12.5], [90.97, 13.03], [91.5, 13.25], [91.75, 13.15], [91.82, 13.18], [91.85, 13.25], 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