{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:14.370075", "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-14_to_2022-Aug-18_202.0_68.5"}, "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": 2022080000668}, "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 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 18 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": 68322.96423700228}, "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": 68.5}, "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": 202.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "202.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 198.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 208.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 67.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 69.03], [-162.0, 69.25], [-161.75, 69.15], [-161.68, 69.18], [-161.53, 69.53], [-161.0, 69.75], [-160.75, 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67.75], [-155.75, 67.85], [-156.0, 67.75], [-156.25, 67.85], [-156.32, 67.82], [-156.47, 67.47], [-157.0, 67.25], [-157.25, 67.35], [-157.5, 67.25], [-157.75, 67.35], [-158.0, 67.25], [-158.25, 67.35], [-158.32, 67.32], [-158.47, 66.97], [-159.0, 66.75], [-159.25, 66.85], [-159.5, 66.75], [-159.75, 66.85], [-160.0, 66.75], [-160.25, 66.85], [-160.5, 66.75], [-161.03, 66.97], [-161.18, 67.32], [-161.25, 67.35], [-161.5, 67.25], [-161.75, 67.35], [-162.0, 67.25], [-162.53, 67.47], [-162.75, 68.0], [-162.65, 68.25], [-162.75, 68.5], [-162.53, 69.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.75, 68.5], [-162.53, 69.03], [-162.0, 69.25], [-161.75, 69.15], [-161.5, 69.25], [-161.25, 69.15], 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-6.474174683403051}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.637403179640046, 0.4453040862740636, 0.08952100314360223, 0.4354567965929732, 0.6814027999575387]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.5019025287479622, -2.0575682440428977, -2.9727688470360363, -0.7262990644449587, -0.19986879878092623]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.957015959660729, -6.867507381437741, -7.039272906142792, -5.803659083395676, -5.46835048072437]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.70475508639754, -8.032705033556624, -8.552847636194713, -6.545417865364584, -5.721890923159094]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5612108745361997, -1.7641198005514753, -1.7860911472499028, -1.4442988021581482, -1.3455180338755923]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8016637936648163, -2.291154572779941, -2.207958024939113, -1.5693855298561892, -1.3794510122732069]}}