{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:53.506376", "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-Nov-20_to_2013-Nov-24_239.0_45.0"}, "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": 2013110000925}, "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": "November 20 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2013"}, "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": 64547.62804492202}, "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": 45.0}, "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": 239.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "239.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 242.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.5, 47.25], [-120.97, 47.03], [-120.75, 46.5], [-120.97, 45.97], [-121.5, 45.75], [-122.03, 45.97], [-122.25, 46.5], [-122.03, 47.03], [-121.5, 47.25]]]]}, "2013-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.04, 45.5], [-122.25, 46.0], [-122.15, 46.25], [-122.25, 46.5], [-122.03, 47.03], [-121.5, 47.25], [-120.97, 47.03], [-120.8, 46.63], [-120.68, 46.68], [-120.53, 47.03], [-120.18, 47.18], [-120.03, 47.53], [-119.5, 47.75], [-119.25, 47.65], [-119.0, 47.75], [-118.5, 47.54], [-118.0, 47.75], [-117.75, 47.65], [-117.5, 47.75], [-116.97, 47.53], [-116.75, 47.0], [-116.85, 46.75], [-116.75, 46.5], [-116.97, 45.97], [-117.5, 45.75], [-117.75, 45.85], [-117.82, 45.82], [-117.85, 45.75], [-117.75, 45.5], [-117.85, 45.25], [-117.75, 45.0], [-117.97, 44.47], [-118.5, 44.25], [-119.03, 44.47], [-119.18, 44.82], [-119.25, 44.85], [-119.32, 44.82], [-119.47, 44.47], [-120.0, 44.25], [-120.25, 44.35], [-120.32, 44.32], [-120.47, 43.97], [-121.0, 43.75], [-121.25, 43.85], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.04, 45.5]]]]}, "2013-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.04, 45.5], [-122.25, 46.0], [-122.15, 46.25], [-122.25, 46.5], [-122.03, 47.03], [-121.5, 47.25], [-120.97, 47.03], [-120.8, 46.63], [-120.68, 46.68], [-120.53, 47.03], [-120.18, 47.18], [-120.03, 47.53], [-119.5, 47.75], [-119.25, 47.65], [-119.0, 47.75], [-118.5, 47.54], [-118.0, 47.75], [-117.75, 47.65], [-117.5, 47.75], [-116.97, 47.53], [-116.75, 47.0], [-116.85, 46.75], [-116.75, 46.5], [-116.97, 45.97], [-117.5, 45.75], [-117.75, 45.85], [-117.82, 45.82], [-117.85, 45.75], [-117.75, 45.5], [-117.85, 45.25], [-117.75, 45.0], [-117.97, 44.47], [-118.5, 44.25], [-119.03, 44.47], [-119.18, 44.82], [-119.25, 44.85], [-119.32, 44.82], [-119.47, 44.47], [-120.0, 44.25], [-120.25, 44.35], [-120.32, 44.32], [-120.47, 43.97], [-121.0, 43.75], [-121.25, 43.85], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.04, 45.5]]]]}, "2013-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.04, 45.5], [-122.25, 46.0], [-122.03, 46.53], [-121.5, 46.75], [-121.0, 46.54], [-120.68, 46.68], [-120.53, 47.03], [-120.18, 47.18], [-120.03, 47.53], [-119.5, 47.75], [-119.25, 47.65], [-119.0, 47.75], [-118.5, 47.54], [-118.0, 47.75], [-117.75, 47.65], [-117.5, 47.75], [-116.97, 47.53], [-116.75, 47.0], [-116.85, 46.75], [-116.75, 46.5], [-116.97, 45.97], [-117.5, 45.75], [-117.75, 45.85], [-117.82, 45.82], [-117.85, 45.75], [-117.75, 45.5], [-117.85, 45.25], [-117.75, 45.0], [-117.97, 44.47], [-118.5, 44.25], [-119.03, 44.47], [-119.18, 44.82], [-119.25, 44.85], [-119.32, 44.82], [-119.47, 44.47], [-120.0, 44.25], [-120.25, 44.35], [-120.32, 44.32], [-120.47, 43.97], [-121.0, 43.75], [-121.25, 43.85], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.04, 45.5]]]]}, "2013-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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{"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.163494871525643, -4.633356583577381, -5.3114149360868055, -3.9634451250863663, -3.526774277189645]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.163494871525643, -14.22692182578919, -12.001538589371478, -8.276452111987567, -4.483299932248542]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.356516924990615, -7.720734619646739, -8.14928434738724, -6.718658004951609, -6.610272757165021]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.356516924990615, -12.453353505725374, -10.17484791929445, -8.398255782631395, -7.79504290586533]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5180635995328928, -1.8796976655454973, -1.9057054719536057, -1.508447174547028, -1.4463804120414014]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5180635995328928, -3.0175870492893107, -2.243299734322498, -1.8685921191798733, -1.6411966772230486]}}