{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:04.148255", "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": "2013-Apr-23_to_2013-Apr-25_261.0_36.0"}, "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": 2013040000900}, "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 23 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2013"}, "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": 166694.2142375171}, "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": 36.0}, "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": 261.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 266.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.03, 32.97], [-102.25, 33.5], [-102.03, 34.03], [-101.5, 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33.47], [-97.82, 33.32], [-97.97, 32.97], [-98.32, 32.82], [-98.47, 32.47], [-99.0, 32.25], [-99.25, 32.35], [-99.32, 32.32], [-99.47, 31.97], [-100.0, 31.75], [-100.25, 31.85], [-100.5, 31.75], [-101.03, 31.97], [-101.25, 32.5], [-101.15, 32.75], [-101.18, 32.82], [-101.25, 32.85], [-101.5, 32.75], [-102.03, 32.97]]]]}, "2013-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.03, 32.97], [-102.25, 33.5], [-102.03, 34.03], [-101.5, 34.25], [-101.25, 34.15], [-101.18, 34.18], [-101.03, 34.53], [-100.68, 34.68], [-100.65, 34.75], [-100.75, 35.0], [-100.53, 35.53], [-100.18, 35.68], [-100.15, 35.75], [-100.25, 36.0], [-100.03, 36.53], [-99.5, 36.75], [-99.25, 36.65], [-99.18, 36.68], [-99.03, 37.03], [-98.68, 37.18], [-98.53, 37.53], [-98.0, 37.75], [-97.75, 37.65], [-97.5, 37.75], [-96.97, 37.53], [-96.82, 37.18], [-96.75, 37.15], [-96.68, 37.18], [-96.53, 37.53], [-96.18, 37.68], [-96.03, 38.03], [-95.5, 38.25], [-95.25, 38.15], [-95.0, 38.25], [-94.75, 38.15], 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32.47], [-99.0, 32.25], [-99.25, 32.35], [-99.32, 32.32], [-99.47, 31.97], [-100.0, 31.75], [-100.25, 31.85], [-100.5, 31.75], [-101.03, 31.97], [-101.25, 32.5], [-101.15, 32.75], [-101.18, 32.82], [-101.25, 32.85], [-101.5, 32.75], [-102.03, 32.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.379468074246006}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.376423917295572}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.952406275100373, 5.481183843246924, 11.495991488511606]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.462737755848707, 3.2965978722937734, 9.898359259978804]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.451287326688899, -11.853113531577726, -5.824870893620076]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.8479203108364, -13.379468074246006, -6.73376944761867]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.86203038143361, -2.971185513936059, -1.4565979772450253]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7975313354488356, -3.3790623580614922, -1.8668607504730843]}}