{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:07.137182", "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": "2025-May-26_to_2025-May-30_261.0_38.0"}, "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": 2025050000632}, "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": "May 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2025"}, "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": 145431.81814621892}, "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": 38.0}, "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": 261.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-100.53, 36.97], [-100.68, 37.32], [-101.03, 37.47], [-101.25, 38.0], [-101.15, 38.25], [-101.25, 38.5], [-101.15, 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[-100.03, 36.47], [-100.18, 36.82], [-100.53, 36.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 38.5], [-101.14999999999998, 38.75], [-101.25, 39.0], [-101.02999999999997, 39.53], [-100.5, 39.75], [-100.0, 39.54], [-99.5, 39.75], [-98.97000000000003, 39.53], [-98.82, 39.18], [-98.75, 39.15], [-98.68, 39.18], [-98.52999999999997, 39.53], [-98.0, 39.75], [-97.75, 39.65], [-97.5, 39.75], [-97.25, 39.65], [-97.0, 39.75], [-96.75, 39.65], [-96.5, 39.75], [-96.25, 39.65], [-96.0, 39.75], [-95.75, 39.65], [-95.5, 39.75], [-94.97000000000003, 39.53], [-94.82, 39.18], [-94.47000000000003, 39.03], [-94.25, 38.5], [-94.35000000000002, 38.25], [-94.25, 38.0], [-94.35000000000002, 37.75], [-94.25, 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t2m anomalies.", "value": [-1.6508181655492002, -1.733957837767507, -1.685358776314345, -1.6335793883948735, -1.3201635058713934]}}