{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:08.746125", "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-Oct-06_to_2021-Oct-09_237.0_47.0"}, "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": 2021100000287}, "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": "October 06 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 09 2021"}, "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": 55496.9738354993}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 47.0}, "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": 237.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 239.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-125.03, 48.53], [-124.5, 48.75], [-124.25, 48.65], [-124.18, 48.68], [-124.03, 49.03], [-123.68, 49.18], [-123.53, 49.53], [-123.18, 49.68], [-123.03, 50.03], [-122.5, 50.25], [-122.0, 50.04], [-121.68, 50.18], [-121.53, 50.53], [-121.0, 50.75], [-120.47, 50.53], [-120.32, 50.18], [-119.97, 50.03], [-119.75, 49.5], [-119.97, 48.97], [-120.5, 48.75], [-120.75, 48.85], [-120.82, 48.82], [-120.85, 48.75], [-120.75, 48.5], [-120.85, 48.25], [-120.75, 48.0], [-120.85, 47.75], [-120.75, 47.5], [-120.97, 46.97], [-121.32, 46.82], [-121.47, 46.47], [-122.0, 46.25], [-122.25, 46.35], [-122.5, 46.25], [-122.75, 46.35], [-123.0, 46.25], [-123.25, 46.35], [-123.5, 46.25], [-124.03, 46.47], [-124.25, 47.0], [-124.15, 47.25], [-124.18, 47.32], [-124.25, 47.35], [-124.5, 47.25], [-125.03, 47.47], [-125.25, 48.0], [-125.03, 48.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.5, 47.25], [-125.03, 47.47], [-125.25, 48.0], [-125.03, 48.53], [-124.5, 48.75], [-124.25, 48.65], [-124.18, 48.68], [-124.03, 49.03], [-123.68, 49.18], [-123.53, 49.53], [-123.18, 49.68], [-123.03, 50.03], [-122.5, 50.25], [-122.0, 50.04], [-121.5, 50.25], [-120.97, 50.03], [-120.75, 49.5], [-120.85, 49.25], [-120.75, 49.0], [-120.85, 48.75], [-120.75, 48.5], [-120.85, 48.25], [-120.75, 48.0], [-120.97, 47.47], [-121.5, 47.25], [-122.03, 47.47], [-122.18, 47.82], [-122.25, 47.85], [-122.32, 47.82], [-122.35, 47.75], [-122.25, 47.5], [-122.35, 47.25], [-122.25, 47.0], [-122.47, 46.47], [-123.0, 46.25], [-123.53, 46.47], [-123.68, 46.82], [-124.03, 46.97], [-124.18, 47.32], [-124.25, 47.35], [-124.5, 47.25]]]]}, "2021-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.5, 47.25], [-125.03, 47.47], [-125.25, 48.0], [-125.03, 48.53], [-124.5, 48.75], [-124.25, 48.65], [-124.18, 48.68], [-124.03, 49.03], [-123.68, 49.18], [-123.53, 49.53], [-123.18, 49.68], [-123.03, 50.03], [-122.5, 50.25], [-122.0, 50.04], [-121.68, 50.18], [-121.53, 50.53], [-121.0, 50.75], [-120.47, 50.53], [-120.32, 50.18], [-119.97, 50.03], [-119.75, 49.5], [-119.97, 48.97], [-120.5, 48.75], [-120.75, 48.85], [-120.82, 48.82], [-120.85, 48.75], [-120.75, 48.5], [-120.85, 48.25], [-120.75, 48.0], [-120.85, 47.75], [-120.75, 47.5], [-120.97, 46.97], [-121.32, 46.82], [-121.47, 46.47], [-122.0, 46.25], [-122.25, 46.35], [-122.5, 46.25], [-122.75, 46.35], [-123.0, 46.25], [-123.25, 46.35], [-123.5, 46.25], [-124.03, 46.47], [-124.25, 47.0], [-124.15, 47.25], [-124.18, 47.32], [-124.25, 47.35], [-124.5, 47.25]]]]}, "2021-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.5, 47.25], [-125.03, 47.47], [-125.25, 48.0], [-125.03, 48.53], [-124.5, 48.75], [-124.25, 48.65], [-124.18, 48.68], [-124.03, 49.03], [-123.68, 49.18], [-123.53, 49.53], [-123.18, 49.68], [-123.03, 50.03], [-122.5, 50.25], [-122.0, 50.04], [-121.68, 50.18], [-121.53, 50.53], [-121.0, 50.75], [-120.47, 50.53], [-120.32, 50.18], [-119.97, 50.03], [-119.75, 49.5], [-119.97, 48.97], [-120.5, 48.75], [-120.75, 48.85], [-120.82, 48.82], [-120.85, 48.75], [-120.75, 48.5], [-120.85, 48.25], [-120.75, 48.0], [-120.85, 47.75], [-120.75, 47.5], [-120.97, 46.97], [-121.32, 46.82], [-121.47, 46.47], [-122.0, 46.25], [-122.25, 46.35], [-122.5, 46.25], [-122.75, 46.35], [-123.0, 46.25], [-123.25, 46.35], [-123.5, 46.25], [-124.03, 46.47], [-124.25, 47.0], [-124.15, 47.25], [-124.18, 47.32], [-124.25, 47.35], [-124.5, 47.25]]]]}, "2021-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 47.5], [-124.03999999999999, 48.0], [-124.25, 48.5], [-124.03, 49.03], [-123.68, 49.18], [-123.53, 49.53], [-123.0, 49.75], [-122.75, 49.65], [-122.5, 49.75], [-122.25, 49.65], [-122.18, 49.68], [-122.03, 50.03], [-121.68, 50.18], [-121.53, 50.53], [-121.0, 50.75], [-120.47, 50.53], 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mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.159667332962442, 6.057365461031679, 5.61919377221318, 5.192008718403997]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.573717904091893, 1.3949412159142867, 0.29632676704511596, 0.49695838666781356]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9626215681222448, -3.547307366726847, -3.769710790063386, -3.5023189093360334]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.534774789172502, -4.435415753702273, -5.193426861913224, -4.269046560255276]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4692074782932882, -1.6615718833103512, -1.6915512150333252, -1.4445538310839392]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8820669784294766, -2.3383675764956853, -2.1325651594292125, -1.6496997890755578]}}