{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:19.087967", "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-Nov-01_to_2022-Nov-05_239.0_35.0"}, "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": 2022110000113}, "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": "November 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 05 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 173146.2411868081}, "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": ["United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": ["Pacific Ocean"]}, "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": 35.0}, "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": 239.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "239.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-118.32, 36.18], [-117.97, 36.03], [-117.75, 35.5], [-117.85, 35.25], [-117.75, 35.0], [-117.97, 34.47], [-118.5, 34.25], 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37.68], [-118.47, 37.53], [-118.25, 37.0], [-118.46, 36.5], [-118.32, 36.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 35.53], [-121.0, 35.75], [-120.47, 35.53], [-120.25, 35.0], [-120.47, 34.47], [-121.0, 34.25], [-121.53, 34.47], [-121.75, 35.0], [-121.53, 35.53]]]]}, "2022-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.25, 38.5], [-123.15, 38.75], [-123.25, 39.0], [-123.15, 39.25], [-123.25, 39.5], [-123.15, 39.75], [-123.25, 40.0], [-123.03, 40.53], [-122.68, 40.68], [-122.53, 41.03], [-122.0, 41.25], [-121.75, 41.15], [-121.68, 41.18], [-121.53, 41.53], [-121.0, 41.75], [-120.75, 41.65], [-120.5, 41.75], [-119.97, 41.53], [-119.80000000000001, 41.13], 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