{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:12.806321", "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": "2022-Feb-01_to_2022-Feb-04_246.0_43.0"}, "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": 2022020000149}, "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": "February 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 04 2022"}, "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": 89891.10788135376}, "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": 43.0}, "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": 246.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 250.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "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": {"2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.53, 44.53], [-115.0, 44.75], [-114.75, 44.65], [-114.5, 44.75], [-114.25, 44.65], [-114.18, 44.68], [-114.03, 45.03], [-113.5, 45.25], [-113.0, 45.04], [-112.68, 45.18], [-112.53, 45.53], [-112.0, 45.75], [-111.75, 45.65], [-111.5, 45.75], [-110.97, 45.53], [-110.82, 45.18], [-110.75, 45.15], [-110.68, 45.18], [-110.53, 45.53], [-110.0, 45.75], [-109.47, 45.53], [-109.25, 45.0], [-109.35, 44.75], [-109.25, 44.5], [-109.47, 43.97], [-109.82, 43.82], [-109.97, 43.47], [-110.5, 43.25], [-110.75, 43.35], [-111.0, 43.25], [-111.53, 43.47], [-111.68, 43.82], [-111.75, 43.85], [-111.82, 43.82], [-111.97, 43.47], [-112.32, 43.32], [-112.47, 42.97], [-113.0, 42.75], [-113.25, 42.85], [-113.32, 42.82], [-113.47, 42.47], [-114.0, 42.25], [-114.25, 42.35], [-114.5, 42.25], [-114.75, 42.35], [-115.0, 42.25], [-115.53, 42.47], [-115.75, 43.0], [-115.54, 43.5], [-115.75, 44.0], [-115.53, 44.53]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.53, 44.53], [-115.0, 44.75], [-114.75, 44.65], [-114.5, 44.75], [-114.25, 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[-115.75, 43.0], [-115.54, 43.5], [-115.75, 44.0], [-115.53, 44.53]], [[-112.2, 43.38], [-112.32, 43.32], [-112.43, 43.07], [-112.18, 43.18], [-112.15, 43.25], [-112.2, 43.38]]]]}, "2022-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.53, 44.53], [-115.0, 44.75], [-114.75, 44.65], [-114.5, 44.75], [-114.25, 44.65], [-114.18, 44.68], [-114.03, 45.03], [-113.5, 45.25], [-113.0, 45.04], [-112.68, 45.18], [-112.53, 45.53], [-112.0, 45.75], [-111.75, 45.65], [-111.5, 45.75], [-110.97, 45.53], [-110.82, 45.18], [-110.75, 45.15], [-110.68, 45.18], [-110.53, 45.53], [-110.0, 45.75], [-109.47, 45.53], [-109.25, 45.0], [-109.35, 44.75], [-109.25, 44.5], [-109.35, 44.25], [-109.25, 44.0], [-109.47, 43.47], [-109.82, 43.32], [-109.85, 43.25], [-109.75, 43.0], [-109.97, 42.47], [-110.32, 42.32], [-110.46, 42.0], [-110.25, 41.5], [-110.35, 41.25], [-110.25, 41.0], [-110.47, 40.47], [-110.82, 40.32], [-110.97, 39.97], [-111.5, 39.75], [-112.03, 39.97], [-112.25, 40.5], 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"value": -8.495997900152034}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-13.665136436770808, -15.2432766006973, -16.687249835514876, -12.738487928429265]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-16.924624408451052, -20.8098349838273, -22.287066734974132, -16.79902662307171]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.676836523649528, -8.812350912790716, -10.305975393317658, -6.943181695010063]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.740629994930032, -11.312694056985436, -12.28072539910329, -7.731606540059033]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.406853315714926, -1.8506907842115994, -2.1701617629752876, -1.4694254858935967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6193438902897943, -2.3241498471010127, -2.6085183202973554, -1.6206754708699926]}}