{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:25.767339", "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-Dec-22_to_2015-Dec-25_200.0_68.0"}, "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": 2015120000580}, "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": "December 22 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2015"}, "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": 66705.92802191789}, "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": 68.0}, "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": 200.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "200.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 194.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 204.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 69.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.5, 69.75], [-163.25, 69.65], [-163.0, 69.75], [-162.75, 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[-164.03, 69.53], [-163.5, 69.75]]]]}, "2015-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.53, 67.97], [-165.75, 68.5], [-165.53, 69.03], [-165.0, 69.25], [-164.75, 69.15], [-164.5, 69.25], [-164.25, 69.15], [-164.18, 69.18], [-164.03, 69.53], [-163.5, 69.75], [-163.25, 69.65], [-163.0, 69.75], [-162.75, 69.65], [-162.5, 69.75], [-162.25, 69.65], [-162.0, 69.75], [-161.75, 69.65], [-161.5, 69.75], [-161.25, 69.65], [-161.0, 69.75], [-160.75, 69.65], [-160.5, 69.75], [-160.25, 69.65], [-160.0, 69.75], [-159.47, 69.53], [-159.32, 69.18], [-159.25, 69.15], [-159.18, 69.18], [-159.03, 69.53], [-158.5, 69.75], [-158.25, 69.65], [-158.0, 69.75], [-157.75, 69.65], [-157.5, 69.75], [-157.25, 69.65], [-157.0, 69.75], [-156.75, 69.65], [-156.5, 69.75], [-156.25, 69.65], [-156.0, 69.75], [-155.47, 69.53], [-155.25, 69.0], [-155.46, 68.5], [-155.25, 68.0], [-155.47, 67.47], [-156.0, 67.25], [-156.25, 67.35], [-156.32, 67.32], [-156.47, 66.97], [-157.0, 66.75], 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -14.058766770923992}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-36.897940543065516, -37.5040533837294, -39.125917307380064, -37.32174265226948]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-41.996080333905326, -43.25007661020973, -46.175167251568354, -43.520475323772786]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-13.085986158319047, -13.82384239582063, -15.328388078478199, -13.500553533600248]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-16.257334916844172, -17.84323052839011, -20.31334346237506, -17.369496465467478]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4675096409141941, -1.580090886525783, -1.8038334091576327, -1.6372807924379245]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8055522783750475, -1.8427739729125612, -2.34502725153836, -2.063190272353274]}}