{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:14.078926", "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": "2025-Jan-05_to_2025-Jan-08_261.5_38.0"}, "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": 2025010000194}, "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": "January 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2025"}, "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": 118475.44322347944}, "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": 38.0}, "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": 261.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 267.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.53, 38.03], [-100.18, 38.18], [-100.03, 38.53], [-99.5, 38.75], [-99.25, 38.65], [-99.0, 38.75], [-98.75, 38.65], [-98.5, 38.75], [-97.97, 38.53], [-97.75, 38.0], [-97.97, 37.47], [-98.32, 37.32], [-98.47, 36.97], [-99.0, 36.75], [-99.25, 36.85], [-99.32, 36.82], [-99.47, 36.47], [-100.0, 36.25], [-100.53, 36.47], [-100.75, 37.0], [-100.65, 37.25], [-100.75, 37.5], [-100.53, 38.03]]]]}, "2025-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.53, 38.03], [-100.18, 38.18], [-100.03, 38.53], [-99.68, 38.68], [-99.65, 38.75], [-99.75, 39.0], [-99.53, 39.53], [-99.0, 39.75], [-98.75, 39.65], [-98.68, 39.68], [-98.53, 40.03], [-98.18, 40.18], [-98.03, 40.53], [-97.5, 40.75], [-97.25, 40.65], [-97.0, 40.75], [-96.75, 40.65], [-96.5, 40.75], [-95.97, 40.53], [-95.82, 40.18], [-95.75, 40.15], [-95.5, 40.25], [-94.97, 40.03], [-94.82, 39.68], [-94.47, 39.53], [-94.32, 39.18], [-94.25, 39.15], [-94.18, 39.18], [-94.03, 39.53], [-93.5, 39.75], [-92.97, 39.53], [-92.82, 39.18], [-92.47, 39.03], [-92.25, 38.5], [-92.47, 37.97], [-93.0, 37.75], [-93.5, 37.96], [-94.0, 37.75], [-94.25, 37.85], [-94.5, 37.75], [-94.75, 37.85], [-94.82, 37.82], [-94.97, 37.47], [-95.5, 37.25], [-95.75, 37.35], [-95.82, 37.32], [-95.97, 36.97], [-96.5, 36.75], [-96.75, 36.85], [-97.0, 36.75], [-97.25, 36.85], [-97.5, 36.75], [-97.75, 36.85], [-98.0, 36.75], [-98.25, 36.85], [-98.5, 36.75], [-98.75, 36.85], [-99.0, 36.75], [-99.25, 36.85], [-99.32, 36.82], [-99.47, 36.47], [-100.0, 36.25], [-100.53, 36.47], [-100.75, 37.0], [-100.65, 37.25], [-100.75, 37.5], [-100.53, 38.03]]]]}, "2025-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.53, 38.03], [-100.18, 38.18], [-100.03, 38.53], [-99.68, 38.68], [-99.65, 38.75], [-99.75, 39.0], [-99.53, 39.53], [-99.0, 39.75], [-98.75, 39.65], [-98.68, 39.68], [-98.53, 40.03], [-98.18, 40.18], [-98.03, 40.53], [-97.5, 40.75], [-97.25, 40.65], [-97.0, 40.75], [-96.75, 40.65], [-96.5, 40.75], [-95.97, 40.53], [-95.82, 40.18], [-95.75, 40.15], [-95.5, 40.25], [-94.97, 40.03], [-94.82, 39.68], [-94.47, 39.53], [-94.32, 39.18], [-94.25, 39.15], [-94.18, 39.18], [-94.03, 39.53], [-93.5, 39.75], [-92.97, 39.53], [-92.82, 39.18], [-92.47, 39.03], [-92.25, 38.5], [-92.47, 37.97], [-93.0, 37.75], [-93.5, 37.96], [-94.0, 37.75], [-94.25, 37.85], [-94.5, 37.75], [-94.75, 37.85], [-94.82, 37.82], [-94.97, 37.47], [-95.5, 37.25], [-95.75, 37.35], [-95.82, 37.32], [-95.97, 36.97], [-96.5, 36.75], [-96.75, 36.85], [-97.0, 36.75], [-97.25, 36.85], [-97.5, 36.75], [-97.75, 36.85], [-98.0, 36.75], [-98.25, 36.85], [-98.5, 36.75], [-98.75, 36.85], [-99.0, 36.75], [-99.25, 36.85], [-99.32, 36.82], [-99.47, 36.47], [-100.0, 36.25], [-100.53, 36.47], [-100.75, 37.0], [-100.65, 37.25], [-100.75, 37.5], [-100.53, 38.03]]]]}, "2025-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.03, 38.53], [-99.68, 38.68], [-99.65, 38.75], [-99.75, 39.0], [-99.53, 39.53], [-99.0, 39.75], [-98.75, 39.65], [-98.68, 39.68], [-98.53, 40.03], [-98.18, 40.18], 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duration", "value": -14.719746863708338}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.70296836959011}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.077421206519716, -13.34938502668524, -13.597967438470732, -11.953727927782836]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.838105265299475, -16.03405609130857, -15.458382670084632, -14.337154769897438]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.964296584010705, -12.327744332576668, -12.49904110559843, -10.778481481256218]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.314975541875867, -14.719746863708338, -14.51840589807432, -13.033289035257837]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4609970783362982, -2.047846211991877, -2.0783860142127923, -1.8063349272786862]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.548458851216855, -2.634168682630926, -2.613156148530178, -2.3447773875185853]}}