{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:42.916489", "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": "2011-Jun-21_to_2011-Jun-23_260.5_44.0"}, "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": 2011060001097}, "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": "June 21 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 23 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 66811.52353541597}, "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": ["C.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": 44.0}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 257.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 263.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.75, 45.0], [-102.53, 45.53], [-102.0, 45.75], [-101.75, 45.65], [-101.5, 45.75], [-101.25, 45.65], [-101.0, 45.75], [-100.75, 45.65], [-100.5, 45.75], [-100.25, 45.65], [-100.0, 45.75], [-99.47, 45.53], [-99.25, 45.0], [-99.35, 44.75], [-99.32, 44.68], [-99.25, 44.65], [-99.0, 44.75], [-98.5, 44.54], [-98.18, 44.68], [-98.03, 45.03], [-97.68, 45.18], [-97.53, 45.53], [-97.0, 45.75], [-96.47, 45.53], [-96.25, 45.0], [-96.47, 44.47], [-96.82, 44.32], [-96.97, 43.97], [-97.32, 43.82], [-97.35, 43.75], [-97.25, 43.5], [-97.35, 43.25], [-97.25, 43.0], [-97.35, 42.75], [-97.25, 42.5], [-97.47, 41.97], [-97.82, 41.82], [-97.97, 41.47], [-98.5, 41.25], [-99.03, 41.47], [-99.25, 42.0], [-99.15, 42.25], [-99.18, 42.32], [-99.53, 42.47], [-99.68, 42.82], [-99.75, 42.85], [-100.0, 42.75], [-100.25, 42.85], [-100.5, 42.75], [-100.75, 42.85], [-101.0, 42.75], [-101.53, 42.97], [-101.75, 43.5], [-101.65, 43.75], [-101.68, 43.82], [-102.03, 43.97], [-102.18, 44.32], [-102.53, 44.47], [-102.75, 45.0]]]]}, "2011-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.75, 45.0], [-102.53, 45.53], [-102.0, 45.75], [-101.75, 45.65], [-101.5, 45.75], [-101.25, 45.65], [-101.0, 45.75], [-100.75, 45.65], [-100.5, 45.75], [-100.25, 45.65], [-100.0, 45.75], [-99.47, 45.53], [-99.25, 45.0], [-99.35, 44.75], [-99.32, 44.68], [-99.25, 44.65], [-99.0, 44.75], [-98.5, 44.54], [-98.18, 44.68], [-98.03, 45.03], [-97.68, 45.18], [-97.53, 45.53], [-97.0, 45.75], [-96.47, 45.53], [-96.25, 45.0], [-96.47, 44.47], [-96.82, 44.32], [-96.97, 43.97], [-97.32, 43.82], [-97.35, 43.75], [-97.25, 43.5], [-97.35, 43.25], [-97.25, 43.0], [-97.35, 42.75], [-97.25, 42.5], [-97.47, 41.97], [-97.82, 41.82], [-97.97, 41.47], [-98.5, 41.25], [-99.03, 41.47], [-99.25, 42.0], [-99.15, 42.25], [-99.18, 42.32], [-99.53, 42.47], [-99.68, 42.82], [-99.75, 42.85], [-100.0, 42.75], [-100.25, 42.85], [-100.5, 42.75], [-100.75, 42.85], [-101.0, 42.75], [-101.53, 42.97], [-101.75, 43.5], [-101.65, 43.75], [-101.68, 43.82], [-102.03, 43.97], [-102.18, 44.32], [-102.53, 44.47], [-102.75, 45.0]]]]}, "2011-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.75, 45.0], [-102.53, 45.53], [-102.0, 45.75], [-101.75, 45.65], [-101.5, 45.75], [-101.25, 45.65], [-101.0, 45.75], [-100.75, 45.65], [-100.5, 45.75], [-100.25, 45.65], [-100.0, 45.75], [-99.47, 45.53], [-99.25, 45.0], [-99.35, 44.75], [-99.32, 44.68], [-99.25, 44.65], [-99.0, 44.75], [-98.5, 44.54], [-98.18, 44.68], [-98.03, 45.03], [-97.68, 45.18], [-97.53, 45.53], [-97.0, 45.75], [-96.47, 45.53], [-96.25, 45.0], [-96.47, 44.47], [-96.82, 44.32], [-96.97, 43.97], [-97.32, 43.82], [-97.35, 43.75], [-97.25, 43.5], [-97.35, 43.25], [-97.25, 43.0], [-97.35, 42.75], [-97.25, 42.5], [-97.47, 41.97], [-97.82, 41.82], [-97.97, 41.47], [-98.5, 41.25], [-99.03, 41.47], [-99.25, 42.0], [-99.15, 42.25], [-99.18, 42.32], [-99.53, 42.47], [-99.68, 42.82], [-99.75, 42.85], [-100.0, 42.75], [-100.25, 42.85], [-100.5, 42.75], [-100.75, 42.85], [-101.0, 42.75], [-101.53, 42.97], [-101.75, 43.5], [-101.65, 43.75], [-101.68, 43.82], [-102.03, 43.97], [-102.18, 44.32], [-102.53, 44.47], [-102.75, 45.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.477400585892724}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.961566630499656}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.867015736572625, 16.63180940231598, 17.291672156547804]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.641569417256449, 14.007556279017194, 15.70816906526153]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.482278021409379, -4.909091818839213, -4.493330051250378]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.477400585892724, -6.154244365686964, -4.919045561168389]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6865827712104238, -1.5149459701740402, -1.384317234587744]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9253169895962352, -2.0255071856617173, -1.5267657262377992]}}