{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:06.990508", "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-08_to_2021-Dec-10_290.0_50.5"}, "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": 2021120000339}, "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 08 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 10 2021"}, "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": 101493.82958795514}, "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": 50.5}, "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": 290.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 289.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.5], [-71.15, 52.75], [-71.25, 53.0], [-71.03, 53.53], [-70.5, 53.75], [-70.25, 53.65], [-70.18, 53.68], [-70.03, 54.03], [-69.5, 54.25], [-69.25, 54.15], [-69.0, 54.25], [-68.5, 54.04], [-68.0, 54.25], [-67.75, 54.15], [-67.5, 54.25], [-66.97, 54.03], [-66.82, 53.68], [-66.75, 53.65], [-66.5, 53.75], [-66.25, 53.65], [-66.0, 53.75], [-65.47, 53.53], [-65.25, 53.0], [-65.35, 52.75], [-65.25, 52.5], [-65.47, 51.97], [-66.0, 51.75], [-66.25, 51.85], [-66.5, 51.75], [-66.75, 51.85], [-67.0, 51.75], [-67.25, 51.85], [-67.32, 51.82], [-67.46, 51.5], [-67.32, 51.18], [-66.97, 51.03], [-66.75, 50.5], [-66.97, 49.97], [-67.5, 49.75], [-67.75, 49.85], [-67.82, 49.82], [-67.85, 49.75], [-67.75, 49.5], [-67.97, 48.97], [-68.32, 48.82], [-68.47, 48.47], [-69.0, 48.25], [-69.25, 48.35], [-69.5, 48.25], [-70.03, 48.47], [-70.25, 49.0], [-70.15, 49.25], [-70.18, 49.32], [-70.53, 49.47], [-70.75, 50.0], [-70.65, 50.25], [-70.75, 50.5], [-70.62, 50.8], [-71.03, 50.97], [-71.25, 51.5], [-71.15, 51.75], [-71.25, 52.0], [-71.15, 52.25], [-71.25, 52.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.14999999999998, 52.25], [-71.25, 52.5], [-71.14999999999998, 52.75], [-71.25, 53.0], [-71.02999999999997, 53.53], [-70.5, 53.75], [-70.25, 53.65], [-70.18, 53.68], [-70.02999999999997, 54.03], [-69.5, 54.25], [-69.25, 54.15], [-69.0, 54.25], [-68.5, 54.04], [-68.0, 54.25], [-67.75, 54.15], [-67.5, 54.25], [-66.97000000000003, 54.03], [-66.82, 53.68], [-66.75, 53.65], [-66.5, 53.75], [-66.25, 53.65], [-66.0, 53.75], [-65.47000000000003, 53.53], [-65.25, 53.0], [-65.35000000000002, 52.75], [-65.25, 52.5], [-65.47000000000003, 51.97], [-66.0, 51.75], [-66.25, 51.85], [-66.5, 51.75], [-66.75, 51.85], [-67.0, 51.75], [-67.25, 51.85], [-67.32, 51.82], [-67.45999999999998, 51.5], [-67.32, 51.18], [-66.97000000000003, 51.03], [-66.75, 50.5], [-66.97000000000003, 49.97], [-67.5, 49.75], [-67.75, 49.85], [-67.82, 49.82], [-67.85000000000002, 49.75], [-67.75, 49.5], [-67.97000000000003, 48.97], [-68.32, 48.82], [-68.47000000000003, 48.47], [-69.0, 48.25], [-69.25, 48.35], [-69.5, 48.25], [-70.02999999999997, 48.47], [-70.25, 49.0], [-70.14999999999998, 49.25], [-70.18, 49.32], [-70.52999999999997, 49.47], [-70.75, 50.0], [-70.64999999999998, 50.25], [-70.75, 50.5], [-70.62, 50.8], [-71.02999999999997, 50.97], [-71.25, 51.5], [-71.14999999999998, 51.75], [-71.25, 52.0]]]]}, "2021-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.14999999999998, 52.25], [-71.25, 52.5], [-71.14999999999998, 52.75], [-71.25, 53.0], [-71.02999999999997, 53.53], [-70.5, 53.75], [-70.25, 53.65], [-70.18, 53.68], [-70.02999999999997, 54.03], [-69.5, 54.25], [-69.25, 54.15], [-69.0, 54.25], [-68.5, 54.04], [-68.0, 54.25], 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52.0]]]]}, "2021-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.14999999999998, 52.25], [-71.25, 52.5], [-71.14999999999998, 52.75], [-71.25, 53.0], [-71.02999999999997, 53.53], [-70.5, 53.75], [-70.25, 53.65], [-70.18, 53.68], [-70.02999999999997, 54.03], [-69.5, 54.25], [-69.25, 54.15], [-69.0, 54.25], [-68.5, 54.04], [-68.0, 54.25], [-67.75, 54.15], [-67.5, 54.25], [-66.97000000000003, 54.03], [-66.82, 53.68], [-66.75, 53.65], [-66.5, 53.75], [-66.25, 53.65], [-66.0, 53.75], [-65.47000000000003, 53.53], [-65.25, 53.0], [-65.35000000000002, 52.75], [-65.25, 52.5], [-65.47000000000003, 51.97], [-66.0, 51.75], [-66.25, 51.85], [-66.5, 51.75], [-66.75, 51.85], [-67.0, 51.75], [-67.25, 51.85], [-67.32, 51.82], [-67.45999999999998, 51.5], [-67.32, 51.18], [-66.97000000000003, 51.03], [-66.75, 50.5], [-66.97000000000003, 49.97], [-67.5, 49.75], [-67.75, 49.85], [-67.82, 49.82], [-67.85000000000002, 49.75], [-67.75, 49.5], [-67.97000000000003, 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-31.229525373078474, -27.255188816874153]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.139693800824416, -11.822005072692601, -9.666601047065676]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.961335868307884, -15.380125032047175, -11.400934462788399]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.624702533622454, -1.848795053832355, -1.4852759513115266]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9238870903034933, -2.2205471586739343, -1.713287830750637]}}