{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:19.954773", "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-Sep-18_to_2022-Sep-22_237.5_39.5"}, "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": 2022090000661}, "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": "September 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 22 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61886.47879578683}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 39.5}, "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": 237.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 236.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 240.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.53, 41.03], [-123.18, 41.18], [-123.03, 41.53], [-122.5, 41.75], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.75, 40.0], [-120.97, 39.47], [-121.37, 39.3], [-121.25, 39.0], [-121.47, 38.47], [-122.0, 38.25], [-122.25, 38.35], [-122.5, 38.25], [-122.75, 38.35], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.75, 39.5], [-123.65, 39.75]]]]}, "2022-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.53, 41.03], [-123.18, 41.18], [-123.03, 41.53], [-122.5, 41.75], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.32, 41.18], [-120.97, 41.03], [-120.82, 40.68], [-120.5, 40.54], [-120.0, 40.75], [-119.47, 40.53], [-119.25, 40.0], [-119.47, 39.47], [-119.82, 39.32], [-119.85, 39.25], [-119.82, 39.18], [-119.47, 39.03], [-119.25, 38.5], [-119.35, 38.25], [-119.32, 38.18], [-118.97, 38.03], [-118.75, 37.5], [-118.97, 36.97], [-119.5, 36.75], [-120.03, 36.97], [-120.18, 37.32], [-120.53, 37.47], [-120.68, 37.82], [-121.03, 37.97], [-121.25, 38.5], [-121.15, 38.75], [-121.18, 38.82], [-121.3, 38.88], [-121.47, 38.47], [-122.0, 38.25], [-122.25, 38.35], [-122.5, 38.25], [-122.75, 38.35], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.75, 39.5], [-123.65, 39.75]]]]}, "2022-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.53, 41.03], [-123.18, 41.18], [-123.03, 41.53], [-122.5, 41.75], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.32, 41.18], [-120.97, 41.03], [-120.82, 40.68], [-120.7, 40.63], [-120.53, 41.03], [-120.0, 41.25], [-119.47, 41.03], [-119.32, 40.68], [-118.97, 40.53], [-118.75, 40.0], [-118.97, 39.47], [-119.32, 39.32], [-119.46, 39.0], [-119.25, 38.5], [-119.35, 38.25], [-119.32, 38.18], [-118.97, 38.03], [-118.75, 37.5], [-118.97, 36.97], [-119.5, 36.75], [-120.03, 36.97], [-120.18, 37.32], [-120.53, 37.47], [-120.68, 37.82], [-121.03, 37.97], [-121.25, 38.5], [-121.15, 38.75], [-121.18, 38.82], [-121.3, 38.88], [-121.47, 38.47], [-122.0, 38.25], [-122.25, 38.35], [-122.5, 38.25], [-122.75, 38.35], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.75, 39.5], [-123.65, 39.75]]]]}, "2022-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 40.25], [-123.75, 40.5], [-123.53, 41.03], [-123.0, 41.25], [-122.75, 41.15], [-122.68, 41.18], [-122.53, 41.53], [-122.0, 41.75], [-121.47, 41.53], [-121.32, 41.18], [-120.97, 41.03], [-120.82, 40.68], [-120.7, 40.63], [-120.53, 41.03], [-120.0, 41.25], [-119.47, 41.03], [-119.32, 40.68], [-118.97, 40.53], [-118.75, 40.0], [-118.97, 39.47], [-119.32, 39.32], [-119.46, 39.0], [-119.25, 38.5], [-119.35, 38.25], [-119.32, 38.18], [-118.97, 38.03], [-118.75, 37.5], [-118.97, 36.97], [-119.5, 36.75], [-120.03, 36.97], [-120.18, 37.32], [-120.53, 37.47], [-120.68, 37.82], [-121.03, 37.97], [-121.25, 38.5], [-121.15, 38.75], [-121.18, 38.82], [-121.3, 38.88], [-121.47, 38.47], [-122.0, 38.25], [-122.25, 38.35], [-122.5, 38.25], [-123.03, 38.47], [-123.18, 38.82], [-123.53, 38.97], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.65, 40.25]]]]}, "2022-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 41.03], [-123.0, 41.25], [-122.75, 41.15], [-122.5, 41.25], [-122.0, 41.04], [-121.5, 41.25], [-120.97, 41.03], [-120.82, 40.68], [-120.7, 40.63], [-120.53, 41.03], [-120.0, 41.25], [-119.47, 41.03], [-119.32, 40.68], [-118.97, 40.53], [-118.75, 40.0], [-118.97, 39.47], [-119.32, 39.32], [-119.47, 38.97], [-120.0, 38.75], [-120.25, 38.85], [-120.5, 38.75], [-121.03, 38.97], [-121.18, 39.32], [-121.25, 39.35], [-121.5, 39.25], [-121.8, 39.38], [-121.97, 38.97], [-122.5, 38.75], [-123.03, 38.97], [-123.18, 39.32], [-123.53, 39.47], [-123.75, 40.0], [-123.65, 40.25], [-123.75, 40.5], [-123.53, 41.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.899155210059689}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.639461683328215}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.233483432111086, 12.705043902613738, 12.883420670219834, 12.64313126629554, 12.283718338819597]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.963571679010215, 8.373146235400043, 8.154072846694476, 7.354614200098979, 8.025715274184279]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.378355199297705, -5.7471160269830275, -5.361827325994384, -5.422149443301907, -5.666563332531828]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.899155210059689, -7.2256872899421865, -6.655604844526636, -6.570632072572721, -7.265925372155948]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9928690362916923, -1.7800054078964147, -1.6148839545136473, -1.60529783528081, -1.579046659592418]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.276825781330972, -2.304523172726501, -2.053583720774631, -1.7929348045934161, -1.8729794495048098]}}