{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:33.327270", "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": "2024-Aug-25_to_2024-Aug-27_225.0_81.0"}, "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": 2024080000670}, "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 25 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 27 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 56137.34344172266}, "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": ["Canada"]}, "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": 81.0}, "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": 225.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "225.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 221.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 236.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 79.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 81.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-139.75, 81.0], [-139.53, 81.53], [-139.0, 81.75], [-138.75, 81.65], [-138.5, 81.75], [-138.25, 81.65], [-138.0, 81.75], [-137.75, 81.65], [-137.68, 81.68], [-137.53, 82.03], [-137.0, 82.25], [-136.75, 82.15], [-136.5, 82.25], [-136.25, 82.15], [-136.0, 82.25], [-135.75, 82.15], [-135.5, 82.25], [-135.25, 82.15], [-135.0, 82.25], [-134.75, 82.15], [-134.5, 82.25], [-134.25, 82.15], [-134.0, 82.25], [-133.75, 82.15], [-133.5, 82.25], [-133.25, 82.15], [-133.0, 82.25], [-132.75, 82.15], [-132.5, 82.25], [-132.25, 82.15], [-132.0, 82.25], [-131.75, 82.15], [-131.5, 82.25], [-131.25, 82.15], [-131.0, 82.25], [-130.75, 82.15], [-130.5, 82.25], [-129.97, 82.03], [-129.82, 81.68], [-129.75, 81.65], [-129.5, 81.75], [-129.25, 81.65], [-129.0, 81.75], [-128.75, 81.65], [-128.5, 81.75], [-128.25, 81.65], [-128.0, 81.75], [-127.47, 81.53], [-127.32, 81.18], [-127.25, 81.15], [-127.0, 81.25], [-126.75, 81.15], [-126.5, 81.25], [-125.97, 81.03], [-125.82, 80.68], [-125.75, 80.65], [-125.5, 80.75], [-125.25, 80.65], [-125.0, 80.75], [-124.47, 80.53], [-124.32, 80.18], [-124.25, 80.15], [-124.0, 80.25], [-123.75, 80.15], [-123.5, 80.25], [-122.97, 80.03], [-122.75, 79.5], [-122.97, 78.97], [-123.5, 78.75], [-123.75, 78.85], [-124.0, 78.75], [-124.25, 78.85], [-124.5, 78.75], [-124.75, 78.85], [-125.0, 78.75], [-125.25, 78.85], [-125.5, 78.75], [-125.75, 78.85], [-126.0, 78.75], [-126.25, 78.85], [-126.5, 78.75], [-126.75, 78.85], [-127.0, 78.75], [-127.25, 78.85], [-127.5, 78.75], [-127.75, 78.85], [-128.0, 78.75], [-128.25, 78.85], [-128.5, 78.75], [-128.75, 78.85], [-129.0, 78.75], [-129.25, 78.85], [-129.5, 78.75], [-129.75, 78.85], [-130.0, 78.75], [-130.25, 78.85], [-130.5, 78.75], [-130.75, 78.85], [-131.0, 78.75], [-131.25, 78.85], [-131.5, 78.75], [-131.75, 78.85], [-132.0, 78.75], [-132.25, 78.85], [-132.5, 78.75], [-132.75, 78.85], [-133.0, 78.75], [-133.25, 78.85], [-133.5, 78.75], [-133.75, 78.85], [-134.0, 78.75], [-134.25, 78.85], [-134.5, 78.75], [-135.03, 78.97], [-135.18, 79.32], [-135.25, 79.35], [-135.5, 79.25], [-135.75, 79.35], [-136.0, 79.25], [-136.25, 79.35], [-136.5, 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duration", "value": -2.3664125656494677}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.3254184259268413, -3.7931717976036907, -3.745061521988873]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.706795923066295, -4.289612863481864, -4.0223447399185375]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2484619070236778, -2.5569060116472397, -2.2938697782774824]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6115921483136617, -3.0440707625251093, -2.5850518391701485]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7812506099601222, 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