{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:28.552236", "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": "2010-Apr-28_to_2010-May-01_240.5_38.5"}, "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": 2010040000809}, "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": "April 28 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 01 2010"}, "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": 399715.8040990808}, "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": 38.5}, "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": 240.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 245.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 41.0], [-124.15, 41.25], [-124.25, 41.5], [-124.15, 41.75], [-124.25, 42.0], [-124.15, 42.25], [-124.25, 42.5], [-124.15, 42.75], [-124.25, 43.0], [-124.03, 43.53], [-123.68, 43.68], [-123.53, 44.03], [-123.0, 44.25], [-122.47, 44.03], [-122.32, 43.68], [-122.25, 43.65], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.18, 43.68], [-121.03, 44.03], [-120.5, 44.25], [-120.25, 44.15], [-120.18, 44.18], [-120.03, 44.53], [-119.5, 44.75], [-119.2, 44.63], [-119.03, 45.03], [-118.5, 45.25], [-117.97, 45.03], [-117.82, 44.68], [-117.75, 44.65], [-117.5, 44.75], [-116.97, 44.53], [-116.75, 44.0], [-116.85, 43.75], [-116.82, 43.68], [-116.47, 43.53], [-116.25, 43.0], [-116.46, 42.5], [-116.25, 42.0], [-116.35, 41.75], [-116.25, 41.5], [-116.47, 40.97], [-116.82, 40.82], [-116.85, 40.75], [-116.75, 40.5], [-116.97, 39.97], [-117.32, 39.82], [-117.47, 39.47], [-117.82, 39.32], [-117.97, 38.97], [-118.32, 38.82], [-118.47, 38.47], [-118.82, 38.32], [-118.85, 38.25], [-118.75, 38.0], [-118.85, 37.75], [-118.75, 37.5], [-118.85, 37.25], [-118.75, 37.0], [-118.97, 36.47], [-119.5, 36.25], [-119.75, 36.35], [-119.87, 36.3], [-119.75, 36.0], [-119.97, 35.47], [-120.5, 35.25], [-121.03, 35.47], [-121.18, 35.82], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.25, 37.5], [-122.03, 38.03], [-121.68, 38.18], [-121.65, 38.25], [-121.68, 38.32], [-122.03, 38.47], [-122.2, 38.88], [-122.32, 38.82], [-122.47, 38.47], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.68, 39.32], [-123.75, 39.35], [-124.0, 39.25], [-124.53, 39.47], [-124.75, 40.0], [-124.53, 40.53], [-124.18, 40.68], [-124.15, 40.75], [-124.25, 41.0]]]]}, "2010-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 41.0], [-124.15, 41.25], [-124.25, 41.5], [-124.15, 41.75], [-124.25, 42.0], [-124.15, 42.25], [-124.25, 42.5], [-124.15, 42.75], [-124.25, 43.0], [-124.03, 43.53], [-123.68, 43.68], [-123.53, 44.03], [-123.0, 44.25], [-122.47, 44.03], [-122.32, 43.68], [-122.25, 43.65], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.18, 43.68], [-121.03, 44.03], [-120.5, 44.25], [-120.25, 44.15], [-120.18, 44.18], [-120.03, 44.53], [-119.5, 44.75], [-119.2, 44.63], [-119.03, 45.03], [-118.5, 45.25], [-117.97, 45.03], [-117.82, 44.68], [-117.75, 44.65], [-117.5, 44.75], [-116.97, 44.53], [-116.75, 44.0], [-116.85, 43.75], [-116.82, 43.68], [-116.47, 43.53], [-116.25, 43.0], [-116.43, 42.57], [-116.0, 42.75], [-115.47, 42.53], [-115.32, 42.18], [-115.25, 42.15], [-115.0, 42.25], [-114.47, 42.03], [-114.25, 41.5], [-114.47, 40.97], [-115.0, 40.75], [-115.25, 40.85], [-115.5, 40.75], [-115.75, 40.85], [-115.82, 40.82], [-115.97, 40.47], [-116.5, 40.25], [-116.8, 40.38], [-116.97, 39.97], [-117.32, 39.82], [-117.47, 39.47], [-117.82, 39.32], [-117.97, 38.97], [-118.32, 38.82], [-118.46, 38.5], [-118.32, 38.18], [-118.25, 38.15], [-118.0, 38.25], [-117.75, 38.15], [-117.68, 38.18], [-117.65, 38.25], [-117.75, 38.5], [-117.53, 39.03], [-117.18, 39.18], [-117.03, 39.53], [-116.5, 39.75], [-115.97, 39.53], [-115.75, 39.0], [-115.85, 38.75], [-115.75, 38.5], [-115.85, 38.25], [-115.75, 38.0], [-115.85, 37.75], [-115.75, 37.5], [-115.97, 36.97], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.25, 36.85], [-117.5, 36.75], [-117.75, 36.85], [-117.82, 36.82], [-117.85, 36.75], [-117.75, 36.5], [-117.85, 36.25], [-117.75, 36.0], [-117.85, 35.75], [-117.75, 35.5], [-117.85, 35.25], [-117.75, 35.0], [-117.97, 34.47], [-118.5, 34.25], [-118.75, 34.35], [-119.0, 34.25], [-119.53, 34.47], [-119.75, 35.0], [-119.65, 35.25], [-119.68, 35.32], [-120.0, 35.46], [-120.5, 35.25], [-121.03, 35.47], [-121.18, 35.82], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.25, 37.5], [-122.03, 38.03], [-121.68, 38.18], [-121.65, 38.25], [-121.68, 38.32], [-122.03, 38.47], [-122.2, 38.88], [-122.32, 38.82], [-122.47, 38.47], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.68, 39.32], [-123.75, 39.35], [-124.0, 39.25], [-124.53, 39.47], [-124.75, 40.0], [-124.53, 40.53], [-124.18, 40.68], [-124.15, 40.75], [-124.25, 41.0]]]]}, "2010-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 41.0], [-124.15, 41.25], [-124.25, 41.5], [-124.15, 41.75], [-124.25, 42.0], [-124.15, 42.25], [-124.25, 42.5], [-124.15, 42.75], [-124.25, 43.0], [-124.03, 43.53], [-123.68, 43.68], [-123.53, 44.03], [-123.0, 44.25], [-122.47, 44.03], [-122.32, 43.68], [-122.25, 43.65], [-122.0, 43.75], [-121.75, 43.65], [-121.5, 43.75], [-121.25, 43.65], [-121.18, 43.68], [-121.03, 44.03], [-120.5, 44.25], [-120.25, 44.15], [-120.18, 44.18], [-120.03, 44.53], [-119.5, 44.75], [-119.2, 44.63], [-119.03, 45.03], [-118.5, 45.25], [-117.97, 45.03], [-117.82, 44.68], [-117.75, 44.65], [-117.5, 44.75], [-116.97, 44.53], [-116.75, 44.0], [-116.85, 43.75], [-116.82, 43.68], [-116.47, 43.53], [-116.25, 43.0], [-116.43, 42.57], [-116.0, 42.75], [-115.47, 42.53], [-115.32, 42.18], [-115.25, 42.15], [-115.0, 42.25], [-114.47, 42.03], [-114.25, 41.5], [-114.47, 40.97], [-115.0, 40.75], [-115.25, 40.85], [-115.5, 40.75], [-115.75, 40.85], [-115.82, 40.82], [-115.97, 40.47], [-116.5, 40.25], [-116.8, 40.38], [-116.97, 39.97], [-117.32, 39.82], [-117.47, 39.47], [-117.82, 39.32], [-117.97, 38.97], [-118.32, 38.82], [-118.46, 38.5], [-118.32, 38.18], [-118.25, 38.15], [-118.0, 38.25], [-117.75, 38.15], [-117.68, 38.18], [-117.65, 38.25], [-117.75, 38.5], [-117.53, 39.03], [-117.18, 39.18], [-117.03, 39.53], [-116.5, 39.75], [-115.97, 39.53], [-115.75, 39.0], [-115.85, 38.75], [-115.75, 38.5], [-115.85, 38.25], [-115.75, 38.0], [-115.85, 37.75], [-115.75, 37.5], [-115.97, 36.97], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.25, 36.85], [-117.5, 36.75], [-117.75, 36.85], [-117.82, 36.82], [-117.85, 36.75], [-117.75, 36.5], [-117.85, 36.25], [-117.75, 36.0], [-117.85, 35.75], [-117.75, 35.5], [-117.85, 35.25], [-117.75, 35.0], [-117.97, 34.47], [-118.5, 34.25], [-118.75, 34.35], [-119.0, 34.25], [-119.53, 34.47], [-119.75, 35.0], [-119.65, 35.25], [-119.68, 35.32], [-120.0, 35.46], [-120.5, 35.25], [-121.03, 35.47], [-121.18, 35.82], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.25, 37.5], [-122.03, 38.03], [-121.68, 38.18], [-121.65, 38.25], [-121.68, 38.32], [-122.03, 38.47], [-122.2, 38.88], [-122.32, 38.82], [-122.47, 38.47], [-123.0, 38.25], [-123.53, 38.47], [-123.75, 39.0], [-123.65, 39.25], [-123.68, 39.32], [-123.75, 39.35], [-124.0, 39.25], [-124.53, 39.47], [-124.75, 40.0], [-124.53, 40.53], [-124.18, 40.68], [-124.15, 40.75], [-124.25, 41.0]]]]}, "2010-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.25, 38.5], [-120.03, 39.03], [-119.5, 39.25], [-118.97, 39.03], [-118.82, 38.68], [-118.47, 38.53], [-118.32, 38.18], [-118.25, 38.15], [-118.0, 38.25], [-117.75, 38.15], [-117.68, 38.18], [-117.65, 38.25], [-117.75, 38.5], [-117.53, 39.03], [-117.18, 39.18], [-117.03, 39.53], [-116.5, 39.75], [-115.97, 39.53], [-115.75, 39.0], [-115.85, 38.75], [-115.75, 38.5], [-115.85, 38.25], [-115.75, 38.0], [-115.85, 37.75], [-115.75, 37.5], [-115.97, 36.97], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.25, 36.85], [-117.5, 36.75], [-117.75, 36.85], [-117.82, 36.82], [-117.85, 36.75], [-117.75, 36.5], [-117.85, 36.25], [-117.75, 36.0], [-117.85, 35.75], [-117.75, 35.5], [-117.85, 35.25], [-117.75, 35.0], [-117.97, 34.47], [-118.5, 34.25], [-118.75, 34.35], [-119.0, 34.25], [-119.53, 34.47], [-119.75, 35.0], [-119.65, 35.25], [-119.68, 35.32], [-120.03, 35.47], [-120.25, 36.0], [-120.04, 36.5], [-120.25, 37.0], [-120.15, 37.25], [-120.25, 37.5], [-120.04, 38.0], [-120.25, 38.5]]], [[[-117.53, 42.03], [-117.0, 42.25], [-116.7, 42.13], [-116.53, 42.53], [-116.0, 42.75], [-115.47, 42.53], [-115.32, 42.18], [-115.25, 42.15], [-115.0, 42.25], [-114.47, 42.03], [-114.25, 41.5], [-114.47, 40.97], [-115.0, 40.75], [-115.25, 40.85], [-115.5, 40.75], [-115.75, 40.85], [-115.82, 40.82], [-115.97, 40.47], [-116.5, 40.25], [-117.03, 40.47], [-117.18, 40.82], [-117.53, 40.97], [-117.75, 41.5], [-117.53, 42.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.995817449718174}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.148331312177628}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.711037693306423, 2.2704735641410707, 4.313490406472567, 4.879345467649443]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.05836110239062, -7.978263238017007, -7.622948855940592, -3.3942455059973327]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.73205734535296, -8.36597703194078, -6.5383906851720655, -5.767113734687438]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.07366344069959, -10.995817449718174, -9.773504848490575, -6.903673851347094]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7145751921346961, -2.1421765438341462, -1.7054828828746906, -1.4669673660347362]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.288138968990667, -2.9765328323562104, -3.017608602577983, -1.76535140378182]}}