{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:16.399434", "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": "2026-Jan-03_to_2026-Jan-07_343.0_15.5"}, "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": 2026010000152}, "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 03 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 07 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 68990.35477067507}, "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": ["Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["North Atlantic Ocean"]}, "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": 15.5}, "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": 343.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "343.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 339.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 343.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.68, 15.68], [-17.65, 15.75], [-17.75, 16.0], [-17.53, 16.53], [-17.18, 16.68], [-17.03, 17.03], [-16.5, 17.25], [-15.97, 17.03], [-15.75, 16.5], [-15.85, 16.25], [-15.75, 16.0], [-15.97, 15.47], [-16.32, 15.32], [-16.47, 14.97], [-16.82, 14.82], [-16.85, 14.75], [-16.75, 14.5], [-16.97, 13.97], [-17.5, 13.75], [-17.75, 13.85], [-18.0, 13.75], [-18.53, 13.97], [-18.75, 14.5], [-18.53, 15.03], [-18.18, 15.18], [-18.03, 15.53], [-17.68, 15.68]]]]}, "2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.75, 12.5], [-20.53, 13.03], [-20.0, 13.25], [-19.75, 13.15], [-19.68, 13.18], [-19.53, 13.53], [-19.0, 13.75], [-18.75, 13.65], [-18.68, 13.68], [-18.65, 13.75], [-18.75, 14.0], [-18.65, 14.25], [-18.75, 14.5], [-18.53, 15.03], [-18.18, 15.18], [-18.03, 15.53], [-17.68, 15.68], [-17.65, 15.75], [-17.75, 16.0], [-17.53, 16.53], [-17.18, 16.68], [-17.03, 17.03], [-16.5, 17.25], [-15.97, 17.03], [-15.75, 16.5], [-15.85, 16.25], [-15.75, 16.0], [-15.85, 15.75], [-15.75, 15.5], [-15.97, 14.97], [-16.32, 14.82], [-16.47, 14.47], [-16.82, 14.32], [-16.85, 14.25], [-16.75, 14.0], [-16.85, 13.75], [-16.75, 13.5], [-16.85, 13.25], [-16.75, 13.0], [-16.85, 12.75], [-16.75, 12.5], [-16.97, 11.97], [-17.5, 11.75], [-18.0, 11.96], [-18.5, 11.75], [-18.75, 11.85], [-18.82, 11.82], [-18.97, 11.47], [-19.5, 11.25], [-20.03, 11.47], [-20.18, 11.82], [-20.53, 11.97], [-20.75, 12.5]]]]}, "2026-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.75, 12.5], [-20.53, 13.03], [-20.0, 13.25], [-19.75, 13.15], [-19.68, 13.18], [-19.53, 13.53], [-19.0, 13.75], [-18.75, 13.65], [-18.68, 13.68], [-18.65, 13.75], [-18.75, 14.0], [-18.65, 14.25], [-18.75, 14.5], [-18.53, 15.03], [-18.18, 15.18], [-18.03, 15.53], [-17.68, 15.68], [-17.65, 15.75], [-17.75, 16.0], [-17.53, 16.53], [-17.18, 16.68], [-17.03, 17.03], [-16.5, 17.25], [-15.97, 17.03], [-15.75, 16.5], [-15.85, 16.25], [-15.75, 16.0], [-15.85, 15.75], [-15.75, 15.5], [-15.97, 14.97], [-16.32, 14.82], [-16.47, 14.47], [-16.82, 14.32], [-16.85, 14.25], [-16.75, 14.0], [-16.85, 13.75], [-16.75, 13.5], [-16.85, 13.25], [-16.75, 13.0], [-16.85, 12.75], [-16.75, 12.5], [-16.97, 11.97], [-17.5, 11.75], [-18.0, 11.96], [-18.5, 11.75], [-18.75, 11.85], [-18.82, 11.82], [-18.97, 11.47], [-19.5, 11.25], [-20.03, 11.47], [-20.18, 11.82], [-20.53, 11.97], [-20.75, 12.5]]]]}, "2026-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.75, 12.5], [-20.53, 13.03], [-20.0, 13.25], [-19.75, 13.15], [-19.68, 13.18], [-19.53, 13.53], [-19.0, 13.75], [-18.75, 13.65], [-18.68, 13.68], [-18.65, 13.75], [-18.75, 14.0], [-18.53, 14.53], [-18.18, 14.68], [-18.03, 15.03], [-17.68, 15.18], [-17.65, 15.25], [-17.75, 15.5], [-17.53, 16.03], [-17.18, 16.18], [-17.15, 16.25], [-17.25, 16.5], [-17.03, 17.03], [-16.5, 17.25], [-15.97, 17.03], [-15.75, 16.5], [-15.85, 16.25], [-15.75, 16.0], [-15.85, 15.75], [-15.75, 15.5], [-15.97, 14.97], [-16.32, 14.82], [-16.47, 14.47], [-16.82, 14.32], [-16.85, 14.25], [-16.75, 14.0], [-16.85, 13.75], [-16.75, 13.5], [-16.85, 13.25], [-16.75, 13.0], [-16.85, 12.75], [-16.75, 12.5], [-16.97, 11.97], [-17.5, 11.75], [-18.0, 11.96], [-18.5, 11.75], [-18.75, 11.85], [-18.82, 11.82], [-18.97, 11.47], [-19.5, 11.25], [-20.03, 11.47], [-20.18, 11.82], [-20.53, 11.97], [-20.75, 12.5]]]]}, "2026-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 14.53], [-17.5, 14.75], [-16.97, 14.53], [-16.75, 14.0], [-16.85, 13.75], [-16.75, 13.5], [-16.97, 12.97], [-17.5, 12.75], [-18.03, 12.97], [-18.25, 13.5], [-18.15, 13.75], [-18.25, 14.0], [-18.03, 14.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.036262747938224}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7544108923074524}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.269392721993597, 21.45183632892116, 21.33143574811413, 21.533110300699946, 21.03389765421548]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.596064503987634, 19.460777537028036, 19.661570485432946, 19.827222442626976, 20.85709915161135]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9986088419164665, -1.746107965663577, -1.780865984910616, -1.6691367334826963, -1.5437097483916489]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.406405307082764, -2.8300545932829664, -2.531464558698133, -3.036262747938224, -1.5610576351725172]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6702851593374262, -1.5897099147487088, -1.6345148008799202, -1.4935327648909789, -1.4332040781732327]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9804554802589098, -1.9832509266780733, -1.8822676972506174, -1.7888837238146715, -1.4435620100431792]}}