{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:22.788048", "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-Feb-07_to_2022-Feb-10_239.0_69.5"}, "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": 2022020000397}, "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 07 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 10 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 76934.7483380047}, "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": 69.5}, "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": 239.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "239.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 250.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.0}, "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": [[[[-122.5, 70.25], [-122.25, 70.15], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-121.25, 70.15], [-121.0, 70.25], [-120.75, 70.15], [-120.5, 70.25], [-120.25, 70.15], [-120.18, 70.18], [-120.03, 70.53], [-119.5, 70.75], [-118.97, 70.53], [-118.82, 70.18], [-118.75, 70.15], [-118.5, 70.25], [-117.97, 70.03], [-117.82, 69.68], [-117.75, 69.65], [-117.5, 69.75], [-116.97, 69.53], [-116.82, 69.18], [-116.75, 69.15], [-116.5, 69.25], [-116.25, 69.15], [-116.0, 69.25], [-115.75, 69.15], [-115.5, 69.25], [-115.25, 69.15], [-115.0, 69.25], [-114.47, 69.03], [-114.25, 68.5], [-114.37, 68.2], [-114.25, 68.15], [-114.0, 68.25], [-113.75, 68.15], [-113.5, 68.25], [-112.97, 68.03], [-112.82, 67.68], [-112.75, 67.65], [-112.5, 67.75], [-112.25, 67.65], [-112.0, 67.75], [-111.75, 67.65], [-111.5, 67.75], [-111.25, 67.65], [-111.0, 67.75], [-110.47, 67.53], [-110.32, 67.18], [-110.25, 67.15], [-110.0, 67.25], [-109.47, 67.03], [-109.32, 66.68], [-108.97, 66.53], [-108.75, 66.0], [-108.97, 65.47], [-109.5, 65.25], [-109.75, 65.35], [-110.0, 65.25], [-110.25, 65.35], [-110.5, 65.25], [-111.03, 65.47], [-111.18, 65.82], [-111.25, 65.85], [-111.5, 65.75], [-111.75, 65.85], [-112.0, 65.75], [-112.25, 65.85], [-112.5, 65.75], [-113.03, 65.97], [-113.18, 66.32], [-113.25, 66.35], [-113.32, 66.32], [-113.47, 65.97], [-114.0, 65.75], [-114.25, 65.85], [-114.32, 65.82], [-114.47, 65.47], [-115.0, 65.25], [-115.53, 65.47], [-115.75, 66.0], [-115.62, 66.3], [-115.75, 66.35], [-116.0, 66.25], [-116.25, 66.35], [-116.5, 66.25], [-117.03, 66.47], [-117.18, 66.82], [-117.25, 66.85], [-117.5, 66.75], [-117.75, 66.85], [-118.0, 66.75], [-118.53, 66.97], [-118.68, 67.32], [-118.75, 67.35], [-119.0, 67.25], [-119.53, 67.47], [-119.68, 67.82], [-120.03, 67.97], [-120.2, 68.38], [-120.5, 68.25], [-121.0, 68.46], [-121.5, 68.25], [-121.75, 68.35], [-122.0, 68.25], [-122.53, 68.47], [-122.68, 68.82], [-123.03, 68.97], [-123.25, 69.5], [-123.03, 70.03], [-122.5, 70.25]]]]}}, "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": {"2022-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 68.97], [-123.25, 69.5], [-123.03, 70.03], [-122.5, 70.25], [-122.25, 70.15], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-121.25, 70.15], [-121.0, 70.25], [-120.47, 70.03], [-120.25, 69.5], [-120.47, 68.97], [-120.82, 68.82], [-120.97, 68.47], [-121.5, 68.25], [-121.75, 68.35], [-122.0, 68.25], [-122.53, 68.47], [-122.68, 68.82], [-123.03, 68.97]]]]}, "2022-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 68.97], [-123.25, 69.5], [-123.03, 70.03], [-122.5, 70.25], [-122.25, 70.15], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-121.25, 70.15], [-121.0, 70.25], [-120.75, 70.15], [-120.5, 70.25], [-120.25, 70.15], [-120.18, 70.18], [-120.03, 70.53], [-119.5, 70.75], [-118.97, 70.53], [-118.82, 70.18], [-118.75, 70.15], [-118.5, 70.25], 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"value": [-35.97112125838018, -38.271251687870375, -38.14159278632158, -38.31727500766283]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-36.71528431487624, -42.86918269115549, -42.45766485601317, -42.13322028992113]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.313977275621047, -10.644077723200912, -10.4699131815528, -10.40239012605274]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.997105602543371, -15.420331200975625, -13.287375709152542, -13.436184976614527]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4610068150308466, -1.6701242695264766, -1.655392071659237, -1.6174962322253186]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5311855543145854, -2.5218750313766285, -2.045125592722902, -1.9500372237186183]}}