{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:50.430941", "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-Aug-01_to_2025-Aug-04_264.0_40.5"}, "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": 2025080000104}, "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": "August 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 04 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 129318.88128136216}, "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": 40.5}, "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": 264.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "264.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 267.5}, "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": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-98.03, 41.03], [-97.63, 41.2], [-97.68, 41.32], [-98.03, 41.47], [-98.25, 42.0], [-98.03, 42.53], [-97.5, 42.75], 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[-98.03, 41.03]]]]}}, "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": {"2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.5, 39.75], [-98.02999999999997, 39.97], [-98.25, 40.5], [-98.02999999999997, 41.03], [-97.5, 41.25], [-97.25, 41.15], [-97.0, 41.25], [-96.75, 41.15], [-96.68, 41.18], [-96.52999999999997, 41.53], [-96.18, 41.68], [-96.02999999999997, 42.03], [-95.5, 42.25], [-95.25, 42.15], [-95.0, 42.25], [-94.75, 42.15], [-94.68, 42.18], [-94.52999999999997, 42.53], [-94.0, 42.75], [-93.75, 42.65], [-93.68, 42.68], [-93.52999999999997, 43.03], [-93.0, 43.25], [-92.47000000000003, 43.03], [-92.32, 42.68], [-91.97000000000003, 42.53], [-91.75, 42.0], [-91.85000000000002, 41.75], [-91.75, 41.5], [-91.97000000000003, 40.97], [-92.5, 40.75], [-92.75, 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.12415211995443, 18.25623728434249, 18.581667836507165, 18.667254384358728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.422449978409226, -4.768157277656455, -4.6436524419968155, -4.427560499899793]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.8465872166086115, -5.353847397576317, -5.496710599094001, -4.767110598483498]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4688554994983545, -1.5240499460730195, -1.4716142412788076, -1.480606421800121]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7038102943813218, -1.737489200652166, -1.6236713196560473, -1.6037747962885383]}}