{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:15.031433", "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-Mar-20_to_2010-Mar-22_260.5_29.5"}, "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": 2010030000631}, "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": "March 20 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 22 2010"}, "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": 179123.27745038562}, "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", "N.Central-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": 29.5}, "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": 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": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.7, 30.62], [-100.54, 31.0], [-100.75, 31.5], [-100.65, 31.75], [-100.75, 32.0], [-100.53, 32.53], [-100.12, 32.7], [-100.25, 33.0], [-100.15, 33.25], [-100.25, 33.5], [-100.15, 33.75], [-100.25, 34.0], [-100.15, 34.25], [-100.25, 34.5], [-100.03, 35.03], [-99.68, 35.18], [-99.53, 35.53], [-99.0, 35.75], [-98.75, 35.65], [-98.68, 35.68], [-98.53, 36.03], [-98.18, 36.18], [-98.03, 36.53], [-97.5, 36.75], [-96.97, 36.53], [-96.75, 36.0], [-96.97, 35.47], [-97.32, 35.32], [-97.35, 35.25], [-97.25, 35.0], [-97.35, 34.75], [-97.32, 34.68], [-97.2, 34.62], [-97.03, 35.03], [-96.68, 35.18], [-96.65, 35.25], [-96.75, 35.5], [-96.53, 36.03], [-96.18, 36.18], [-96.03, 36.53], [-95.5, 36.75], [-95.25, 36.65], [-95.0, 36.75], [-94.47, 36.53], [-94.25, 36.0], [-94.47, 35.47], [-94.82, 35.32], [-94.85, 35.25], [-94.75, 35.0], [-94.85, 34.75], [-94.75, 34.5], [-94.85, 34.25], [-94.75, 34.0], [-94.97, 33.47], [-95.5, 33.25], [-95.75, 33.35], [-95.82, 33.32], [-95.85, 33.25], [-95.75, 33.0], [-95.97, 32.47], [-96.32, 32.32], [-96.35, 32.25], [-96.25, 32.0], [-96.35, 31.75], [-96.25, 31.5], [-96.47, 30.97], [-96.82, 30.82], [-96.97, 30.47], [-97.5, 30.25], [-97.75, 30.35], [-97.82, 30.32], [-97.85, 30.25], [-97.75, 30.0], [-97.97, 29.47], [-98.5, 29.25], [-98.8, 29.38], [-98.97, 28.97], [-99.5, 28.75], [-99.75, 28.85], [-100.0, 28.75], [-100.25, 28.85], [-100.5, 28.75], [-101.03, 28.97], [-101.18, 29.32], [-101.53, 29.47], [-101.75, 30.0]]]]}, "2010-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.7, 30.62], [-100.54, 31.0], [-100.75, 31.5], [-100.65, 31.75], [-100.75, 32.0], [-100.53, 32.53], [-100.12, 32.7], [-100.25, 33.0], [-100.15, 33.25], [-100.25, 33.5], [-100.15, 33.75], [-100.25, 34.0], [-100.15, 34.25], [-100.25, 34.5], [-100.03, 35.03], [-99.68, 35.18], [-99.53, 35.53], [-99.0, 35.75], [-98.75, 35.65], [-98.68, 35.68], [-98.53, 36.03], [-98.18, 36.18], [-98.03, 36.53], [-97.5, 36.75], [-96.97, 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[-101.53, 29.47], [-101.75, 30.0]]]]}, "2010-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.75, 30.0], [-101.53, 30.53], [-101.0, 30.75], [-100.7, 30.62], [-100.54, 31.0], [-100.75, 31.5], [-100.65, 31.75], [-100.75, 32.0], [-100.53, 32.53], [-100.12, 32.7], [-100.25, 33.0], [-100.15, 33.25], [-100.25, 33.5], [-100.15, 33.75], [-100.25, 34.0], [-100.15, 34.25], [-100.25, 34.5], [-100.03, 35.03], [-99.68, 35.18], [-99.53, 35.53], [-99.0, 35.75], [-98.75, 35.65], [-98.68, 35.68], [-98.53, 36.03], [-98.18, 36.18], [-98.03, 36.53], [-97.5, 36.75], [-96.97, 36.53], [-96.75, 36.0], [-96.97, 35.47], [-97.32, 35.32], [-97.35, 35.25], [-97.25, 35.0], [-97.35, 34.75], [-97.32, 34.68], [-97.2, 34.62], [-97.03, 35.03], [-96.68, 35.18], [-96.65, 35.25], [-96.75, 35.5], [-96.53, 36.03], [-96.18, 36.18], [-96.03, 36.53], [-95.5, 36.75], [-95.25, 36.65], [-95.0, 36.75], [-94.47, 36.53], [-94.25, 36.0], [-94.47, 35.47], [-94.82, 35.32], [-94.85, 35.25], [-94.75, 35.0], 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mean t2m.", "value": [6.978485408664142, 3.1877529609636213, 8.388876468107583]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.1583802334392317, -0.4778754203574067, 4.572598963123085]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.057761014156764, -12.077164713506784, -6.853166407796078]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.023414084653098, -14.045624913627023, -8.125443338662365]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7527069144324285, -2.6434240775179663, -1.490256836455362]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.315713843947084, -3.0732442237155064, -1.9822465555991207]}}