{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:24.798225", "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-Feb-08_to_2024-Feb-14_244.5_37.5"}, "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": 2024020000253}, "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": "February 08 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 14 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 56612.16959879524}, "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": 37.5}, "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": 244.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "244.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 242.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 245.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-118.65, 36.25], [-118.75, 36.5], [-118.65, 36.75], [-118.75, 37.0], [-118.53, 37.53], [-118.18, 37.68], [-118.15, 37.75], [-118.25, 38.0], [-118.03, 38.53], [-117.5, 38.75], [-117.25, 38.65], [-117.0, 38.75], [-116.75, 38.65], [-116.5, 38.75], [-116.25, 38.65], [-116.0, 38.75], [-115.75, 38.65], [-115.5, 38.75], [-115.25, 38.65], [-115.0, 38.75], [-114.47, 38.53], [-114.32, 38.18], [-113.97, 38.03], [-113.75, 37.5], [-113.97, 36.97], [-114.5, 36.75], [-114.75, 36.85], [-114.87, 36.8], [-114.75, 36.5], [-114.85, 36.25], [-114.75, 36.0], [-114.97, 35.47], [-115.5, 35.25], [-116.03, 35.47], [-116.25, 36.0], [-116.15, 36.25], [-116.18, 36.32], [-116.25, 36.35], [-116.32, 36.32], [-116.47, 35.97], [-116.82, 35.82], [-116.97, 35.47], [-117.5, 35.25], [-117.75, 35.35], [-118.0, 35.25], [-118.53, 35.47], [-118.75, 36.0], [-118.65, 36.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.42382011591559}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.5631360045736074, -0.5396808454460711, -1.9220470791591424, -4.611191022745061, -3.9119433411740943, -4.130472724833851, -2.9631381986739598]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.807591225915985, -5.1165855104362095, -6.375542243587802, -9.679428809362605, -9.38659608913207, -7.232273918621672, -3.061367338932996]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.80402070478047, -6.26661252284496, -6.333215455779039, -8.699893824032007, -7.97595595858592, -7.336770619664691, -6.731979050113694]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily 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