{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:48.567637", "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": "2015-Sep-10_to_2015-Sep-12_200.5_67.0"}, "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": 2015090000433}, "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 10 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 12 2015"}, "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": 55579.469104054864}, "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": ["N.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": ["Chukchi Sea"]}, "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": 67.0}, "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": 200.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "200.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 193.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 68.53], [-166.0, 68.75], [-165.75, 68.65], [-165.5, 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[-163.5, 65.75], [-163.75, 65.85], [-163.82, 65.82], [-163.97, 65.47], [-164.5, 65.25], [-164.75, 65.35], [-165.0, 65.25], [-165.25, 65.35], [-165.5, 65.25], [-166.03, 65.47], [-166.25, 66.0], [-166.03, 66.53], [-165.5, 66.75], [-165.75, 66.85], [-166.0, 66.75], [-166.53, 66.97], [-166.75, 67.5], [-166.65, 67.75], [-166.75, 68.0], [-166.53, 68.53]], [[-165.25, 66.65], [-165.18, 66.68], [-165.15, 66.75], [-165.18, 66.82], [-165.25, 66.85], [-165.5, 66.75], [-165.25, 66.65]]]]}, "2015-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 68.53], [-166.0, 68.75], [-165.75, 68.65], [-165.5, 68.75], [-165.25, 68.65], [-165.0, 68.75], [-164.75, 68.65], [-164.5, 68.75], [-164.25, 68.65], [-164.0, 68.75], [-163.75, 68.65], [-163.5, 68.75], [-163.25, 68.65], [-163.0, 68.75], [-162.47, 68.53], [-162.25, 68.0], [-162.35, 67.75], [-162.32, 67.68], [-162.25, 67.65], [-162.0, 67.75], [-161.75, 67.65], [-161.5, 67.75], [-161.25, 67.65], [-161.0, 67.75], [-160.75, 67.65], 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66.68], [-165.15, 66.75], [-165.18, 66.82], [-165.25, 66.85], [-165.5, 66.75], [-165.25, 66.65]]]]}, "2015-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 68.53], [-166.0, 68.75], [-165.75, 68.65], [-165.5, 68.75], [-165.25, 68.65], [-165.0, 68.75], [-164.75, 68.65], [-164.5, 68.75], [-164.25, 68.65], [-164.0, 68.75], [-163.75, 68.65], [-163.5, 68.75], [-163.25, 68.65], [-163.0, 68.75], [-162.47, 68.53], [-162.25, 68.0], [-162.35, 67.75], [-162.32, 67.68], [-162.25, 67.65], [-162.0, 67.75], [-161.75, 67.65], [-161.5, 67.75], [-161.25, 67.65], [-161.0, 67.75], [-160.75, 67.65], [-160.5, 67.75], [-160.25, 67.65], [-160.18, 67.68], [-160.03, 68.03], [-159.5, 68.25], [-158.97, 68.03], [-158.82, 67.68], [-158.75, 67.65], [-158.5, 67.75], [-158.25, 67.65], [-158.0, 67.75], [-157.47, 67.53], [-157.25, 67.0], [-157.47, 66.47], [-158.0, 66.25], [-158.25, 66.35], [-158.32, 66.32], [-158.47, 65.97], [-159.0, 65.75], [-159.25, 65.85], [-159.5, 65.75], [-159.8, 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"evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.4451719993186316, 1.6950072643431326, 2.1411883134352365]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.8536903089365637, -2.383130245057316, -1.4498885499227754]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.36423275476625, -4.880743926823018, -4.251680595497557]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.916895211495557, -6.123310169327567, -5.680106055783426]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6685163709232687, -1.7700391510811568, -1.44013622238174]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9097326715196041, -1.92400939751894, -1.7152138301174196]}}