{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:09.056739", "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-30_to_2022-Jul-07_236.5_40.0"}, "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": 2022060001370}, "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 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 07 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 61710.75354788698}, "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": []}, "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": 40.0}, "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": 236.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "236.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 236.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 240.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-121.5, 38.75], [-121.25, 38.65], [-121.0, 38.75], [-120.47, 38.53], [-120.25, 38.0], [-120.47, 37.47], [-121.0, 37.25], 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"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": {"2022-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.5, 37.25], [-123.03, 37.47], [-123.25, 38.0], [-123.03, 38.53], [-122.5, 38.75], [-122.25, 38.65], [-122.0, 38.75], [-121.47, 38.53], [-121.25, 38.0], [-121.47, 37.47], [-122.0, 37.25], [-122.25, 37.35], [-122.5, 37.25]]]]}, "2022-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.5, 37.25], [-123.03, 37.47], [-123.25, 38.0], [-123.03, 38.53], [-122.5, 38.75], [-122.25, 38.65], [-122.0, 38.75], [-121.47, 38.53], [-121.25, 38.0], [-121.47, 37.47], [-122.0, 37.25], [-122.25, 37.35], [-122.5, 37.25]]]]}, "2022-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 39.5], [-124.03, 40.03], [-123.5, 40.25], 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