{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:23.930364", "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": "2013-Sep-18_to_2013-Sep-21_195.0_64.0"}, "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": 2013090000889}, "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 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 21 2013"}, "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": 57411.57815345396}, "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": ["Bering 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": 64.0}, "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": 195.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "195.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 192.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 198.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-168.25, 64.0], [-168.03, 64.53], [-167.5, 64.75], [-167.25, 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[-167.0, 62.75], [-167.53, 62.97], [-167.68, 63.32], [-168.03, 63.47], [-168.25, 64.0]]]]}, "2013-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-168.25, 64.0], [-168.03, 64.53], [-167.5, 64.75], [-167.25, 64.65], [-167.18, 64.68], [-167.15, 64.75], [-167.25, 65.0], [-167.03, 65.53], [-166.5, 65.75], [-166.25, 65.65], [-166.0, 65.75], [-165.75, 65.65], [-165.5, 65.75], [-165.25, 65.65], [-165.18, 65.68], [-165.15, 65.75], [-165.18, 65.82], [-165.53, 65.97], [-165.75, 66.5], [-165.53, 67.03], [-165.0, 67.25], [-164.47, 67.03], [-164.32, 66.68], [-163.97, 66.53], [-163.82, 66.18], [-163.75, 66.15], [-163.5, 66.25], [-162.97, 66.03], [-162.82, 65.68], [-162.75, 65.65], [-162.5, 65.75], [-162.25, 65.65], [-162.0, 65.75], [-161.47, 65.53], [-161.25, 65.0], [-161.47, 64.47], [-162.0, 64.25], [-162.25, 64.35], [-162.32, 64.32], [-162.35, 64.25], [-162.25, 64.0], [-162.35, 63.75], [-162.25, 63.5], [-162.47, 62.97], [-163.0, 62.75], [-163.25, 62.85], [-163.5, 62.75], [-163.75, 62.85], [-164.0, 62.75], [-164.25, 62.85], [-164.32, 62.82], [-164.47, 62.47], [-165.0, 62.25], [-165.53, 62.47], [-165.68, 62.82], [-165.75, 62.85], [-166.0, 62.75], [-166.25, 62.85], [-166.5, 62.75], [-166.75, 62.85], [-167.0, 62.75], [-167.53, 62.97], [-167.68, 63.32], [-168.03, 63.47], [-168.25, 64.0]]]]}, "2013-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-168.25, 64.0], [-168.03, 64.53], [-167.5, 64.75], [-167.25, 64.65], [-167.18, 64.68], [-167.15, 64.75], [-167.25, 65.0], [-167.03, 65.53], [-166.5, 65.75], [-166.25, 65.65], [-166.0, 65.75], [-165.75, 65.65], [-165.5, 65.75], [-165.25, 65.65], [-165.18, 65.68], [-165.15, 65.75], [-165.18, 65.82], [-165.53, 65.97], [-165.75, 66.5], [-165.53, 67.03], [-165.0, 67.25], [-164.47, 67.03], [-164.32, 66.68], [-163.97, 66.53], [-163.82, 66.18], [-163.75, 66.15], [-163.5, 66.25], [-162.97, 66.03], [-162.82, 65.68], [-162.75, 65.65], [-162.5, 65.75], [-162.25, 65.65], [-162.0, 65.75], [-161.47, 65.53], 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"description": "The daily evolution of maximum t2m.", "value": [-1.485074224718403, -1.3275697326239992, -2.1008941655765625, -1.3623627011599524]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.533803953381916, -4.2039351651248085, -4.556564815736965, -3.963033187029954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.765779252679806, -5.027566060889853, -5.605655984453392, -4.884028389164143]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.705478165353311, -1.5638772300245836, -1.690545445747402, -1.4247703256123245]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9666418048770429, -1.829645103812745, -1.9706413156899854, -1.6365231615194273]}}