{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:15.025688", "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": "2021-Dec-20_to_2021-Dec-25_244.5_64.5"}, "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": 2021120000794}, "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": "December 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 58862.88529496905}, "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": 64.5}, "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": 248.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-115.5, 65.25], [-115.25, 65.15], [-115.0, 65.25], [-114.75, 65.15], [-114.5, 65.25], [-113.97, 65.03], [-113.82, 64.68], [-113.75, 64.65], [-113.5, 64.75], [-112.97, 64.53], [-112.82, 64.18], [-112.47, 64.03], [-112.32, 63.68], [-112.25, 63.65], [-112.0, 63.75], [-111.75, 63.65], [-111.5, 63.75], [-110.97, 63.53], [-110.75, 63.0], [-110.97, 62.47], [-111.32, 62.32], [-111.47, 61.97], [-112.0, 61.75], [-112.25, 61.85], [-112.5, 61.75], [-112.75, 61.85], [-113.0, 61.75], [-113.25, 61.85], [-113.5, 61.75], [-113.75, 61.85], [-113.82, 61.82], [-113.97, 61.47], [-114.5, 61.25], [-114.75, 61.35], [-115.0, 61.25], [-115.53, 61.47], [-115.68, 61.82], [-116.03, 61.97], [-116.25, 62.5], [-116.15, 62.75], [-116.25, 63.0], [-116.15, 63.25], [-116.18, 63.32], [-116.53, 63.47], [-116.68, 63.82], [-116.75, 63.85], [-117.0, 63.75], [-117.25, 63.85], [-117.5, 63.75], [-118.03, 63.97], [-118.18, 64.32], [-118.53, 64.47], [-118.75, 65.0], [-118.65, 65.25], [-118.75, 65.5], [-118.53, 66.03], [-118.0, 66.25], [-117.75, 66.15], [-117.5, 66.25], [-117.25, 66.15], [-117.0, 66.25], [-116.75, 66.15], [-116.5, 66.25], [-115.97, 66.03], [-115.75, 65.5], [-115.85, 65.25], [-115.8, 65.13], [-115.5, 65.25]]]]}}, "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": {"2021-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.53, 63.47], [-116.75, 64.0], [-116.53, 64.53], [-116.18, 64.68], [-116.03, 65.03], [-115.5, 65.25], [-115.25, 65.15], [-115.0, 65.25], [-114.75, 65.15], [-114.5, 65.25], [-113.97, 65.03], [-113.82, 64.68], [-113.75, 64.65], [-113.5, 64.75], [-112.97, 64.53], [-112.82, 64.18], [-112.47, 64.03], [-112.32, 63.68], [-112.25, 63.65], [-112.0, 63.75], [-111.75, 63.65], [-111.5, 63.75], [-110.97, 63.53], [-110.75, 63.0], [-110.97, 62.47], [-111.32, 62.32], [-111.47, 61.97], [-112.0, 61.75], [-112.25, 61.85], [-112.5, 61.75], [-112.75, 61.85], [-113.0, 61.75], [-113.25, 61.85], 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"anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.709147764547254, -14.943058752268797, -12.218343172523959, -12.281385857203986, -12.95042937902059, -12.971218584969364]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.547318593386164, -1.6260758374875701, -1.3551743570555232, -1.4926016075827944, -1.6593966835448206, -1.6356890799123567]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6699223616765153, -1.866552078158013, -1.4695984678642138, -1.6272467467125211, -1.817202608421002, -1.8904069490017101]}}