{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:49.355058", "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-15_to_2015-Sep-18_237.5_40.5"}, "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": 2015090000596}, "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 15 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 18 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": 120881.27736982428}, "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": 40.5}, "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": 236.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.15, 40.75], [-124.25, 41.0], [-124.03, 41.53], [-123.68, 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[-123.68, 39.32], [-124.03, 39.47], [-124.25, 40.0], [-124.15, 40.25], [-124.25, 40.5], [-124.15, 40.75]]]]}, "2015-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.15, 40.75], [-124.25, 41.0], [-124.03, 41.53], [-123.68, 41.68], [-123.53, 42.03], [-123.18, 42.18], [-123.03, 42.53], [-122.68, 42.68], [-122.65, 42.75], [-122.75, 43.0], [-122.53, 43.53], [-122.18, 43.68], [-122.03, 44.03], [-121.5, 44.25], [-121.25, 44.15], [-121.0, 44.25], [-120.47, 44.03], [-120.3, 43.63], [-120.0, 43.75], [-119.75, 43.65], [-119.68, 43.68], [-119.53, 44.03], [-119.18, 44.18], [-119.03, 44.53], [-118.5, 44.75], [-117.97, 44.53], [-117.75, 44.0], [-117.97, 43.47], [-118.32, 43.32], [-118.35, 43.25], [-118.32, 43.18], [-117.97, 43.03], [-117.75, 42.5], [-117.97, 41.97], [-118.5, 41.75], [-118.75, 41.85], [-119.0, 41.75], [-119.25, 41.85], [-119.5, 41.75], [-119.75, 41.85], [-119.82, 41.82], [-119.85, 41.75], [-119.75, 41.5], [-119.97, 40.97], [-120.5, 40.75], [-120.75, 40.85], 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anomalies.", "value": [-5.443750446998347, -7.487788883301529, -6.091955122749119, -6.036561483598462]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.8032497296740075, -9.44007819510955, -7.58289742603597, -6.165936917923943]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6615104941952519, -2.2248100558150914, -1.7466358771652053, -1.4558265325119808]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1929648285185066, -2.9069695339528647, -2.421345404790043, -1.458798648516199]}}