{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:37.745846", "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-Mar-10_to_2022-Mar-12_266.0_45.5"}, "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": 2022030000388}, "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": "March 10 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 12 2022"}, "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": 128550.991108116}, "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": 45.5}, "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": 266.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 261.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 268.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-99.03, 47.53], [-98.5, 47.75], [-98.25, 47.65], [-98.0, 47.75], [-97.75, 47.65], [-97.68, 47.68], [-97.54, 48.0], 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[-98.18, 45.82], [-98.53, 45.97], [-98.68, 46.32], [-99.03, 46.47], [-99.25, 47.0], [-99.03, 47.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.02999999999997, 46.47], [-99.25, 47.0], [-99.02999999999997, 47.53], [-98.5, 47.75], [-98.25, 47.65], [-98.0, 47.75], [-97.75, 47.65], [-97.68, 47.68], [-97.54000000000002, 48.0], [-97.75, 48.5], [-97.52999999999997, 49.03], [-97.18, 49.18], [-97.02999999999997, 49.53], [-96.5, 49.75], [-96.25, 49.65], [-96.0, 49.75], [-95.75, 49.65], [-95.5, 49.75], [-95.25, 49.65], [-95.0, 49.75], [-94.47000000000003, 49.53], [-94.32, 49.18], [-93.97000000000003, 49.03], [-93.82, 48.68], [-93.5, 48.54], [-93.0, 48.75], [-92.47000000000003, 48.53], [-92.25, 48.0], 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"Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.867958680417217}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.50275594067791}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-15.554269314924738, -14.598154404083004, -17.498737370140276]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.59123697778827, -17.685690908367093, -19.321458045181288]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.564453032533914, -10.231738757980468, -13.71207603151935]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.422473401778404, -12.558180087922352, -14.867958680417217]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5153515408904317, -1.4930075726048349, -2.055919316814962]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.700316026786921, -1.7268720672010964, -2.257968498244911]}}