{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:10.851884", "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-Aug-09_to_2022-Aug-13_269.5_28.5"}, "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": 2022080000473}, "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 09 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 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": 206983.03252701426}, "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": 28.5}, "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": 269.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 266.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 272.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-94.15, 28.75], [-94.25, 29.0], [-94.15, 29.25], [-94.25, 29.5], [-94.03, 30.03], [-93.5, 30.25], [-93.25, 30.15], [-93.0, 30.25], [-92.47, 30.03], [-92.32, 29.68], [-92.25, 29.65], [-92.18, 29.68], [-92.03, 30.03], [-91.5, 30.25], [-91.25, 30.15], [-91.0, 30.25], [-90.7, 30.12], [-90.53, 30.53], [-90.0, 30.75], [-89.75, 30.65], [-89.5, 30.75], [-89.25, 30.65], [-89.0, 30.75], [-88.75, 30.65], [-88.68, 30.68], [-88.53, 31.03], [-88.0, 31.25], [-87.47, 31.03], [-87.25, 30.5], [-87.35, 30.25], [-87.25, 30.0], [-87.47, 29.47], [-87.82, 29.32], [-87.85, 29.25], [-87.75, 29.0], [-87.87, 28.7], [-87.75, 28.65], [-87.5, 28.75], [-86.97, 28.53], [-86.75, 28.0], [-86.97, 27.47], [-87.32, 27.32], [-87.47, 26.97], [-88.0, 26.75], [-88.25, 26.85], [-88.5, 26.75], [-88.75, 26.85], [-89.0, 26.75], [-89.25, 26.85], [-89.32, 26.82], [-89.47, 26.47], [-90.0, 26.25], [-90.3, 26.38], [-90.47, 25.97], [-91.0, 25.75], [-91.25, 25.85], [-91.5, 25.75], [-91.75, 25.85], [-92.0, 25.75], [-92.25, 25.85], [-92.32, 25.82], [-92.47, 25.47], [-93.0, 25.25], [-93.53, 25.47], [-93.68, 25.82], [-94.03, 25.97], [-94.25, 26.5], [-94.15, 26.75], [-94.18, 26.82], [-94.53, 26.97], [-94.75, 27.5], [-94.65, 27.75], [-94.75, 28.0], [-94.53, 28.53], [-94.18, 28.68], [-94.15, 28.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 27.0], [-92.02999999999997, 27.53], [-91.68, 27.68], [-91.52999999999997, 28.03], [-91.18, 28.18], [-91.14999999999998, 28.25], [-91.18, 28.32], [-91.25, 28.35], [-91.5, 28.25], [-92.02999999999997, 28.47], [-92.25, 29.0], [-92.14999999999998, 29.25], [-92.25, 29.5], [-92.02999999999997, 30.03], [-91.5, 30.25], [-90.97000000000003, 30.03], [-90.82, 29.68], [-90.75, 29.65], [-90.5, 29.75], [-90.25, 29.65], [-90.18, 29.68], [-90.02999999999997, 30.03], [-89.5, 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"value": [27.250857532432292, 27.13484932292721, 26.688830981780484, 26.47701879715015, 26.759487679529173]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.609673557220674, 26.29770560562116, 25.8696992668867, 25.825537895092168, 26.431608895523595]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0658651464666713, -1.2736178909406999, -1.714347988411269, -1.8893846665370488, -1.7208179125127552]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4277937248382386, -1.8208590197084504, -2.5082421415140743, -2.489830143840095, -2.09439258138525]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.521994325163605, 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