{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:30:32.478021", "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-Apr-02_to_2022-Apr-05_343.5_19.0"}, "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": 2022040000121}, "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 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 05 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": 85501.56222907701}, "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": ["Mauritania", "Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 19.0}, "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": 343.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "343.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 342.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 345.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 18.75], [-17.25, 19.0], [-17.03, 19.53], [-16.5, 19.75], [-15.97, 19.53], [-15.75, 19.0], [-15.85, 18.75], [-15.75, 18.5], [-15.85, 18.25], [-15.75, 18.0], [-15.97, 17.47], [-16.5, 17.25], [-17.03, 17.47], [-17.25, 18.0], [-17.15, 18.25], [-17.25, 18.5], [-17.15, 18.75]]]]}, "2022-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 16.53], [-17.5, 16.75], [-17.2, 16.62], [-17.15, 16.75], [-17.25, 17.0], [-17.15, 17.25], [-17.25, 17.5], [-17.15, 17.75], [-17.25, 18.0], [-17.15, 18.25], [-17.25, 18.5], [-17.15, 18.75], [-17.25, 19.0], [-17.03, 19.53], [-16.68, 19.68], [-16.53, 20.03], [-16.0, 20.25], [-15.47, 20.03], [-15.32, 19.68], [-14.97, 19.53], [-14.75, 19.0], [-14.85, 18.75], [-14.82, 18.68], [-14.75, 18.65], [-14.5, 18.75], [-13.97, 18.53], [-13.75, 18.0], [-13.85, 17.75], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-14.82, 16.32], [-14.97, 15.97], [-15.32, 15.82], [-15.47, 15.47], [-16.0, 15.25], [-16.25, 15.35], [-16.32, 15.32], [-16.47, 14.97], [-17.0, 14.75], [-17.25, 14.85], [-17.5, 14.75], [-18.03, 14.97], [-18.25, 15.5], [-18.15, 15.75], [-18.25, 16.0], [-18.03, 16.53]]]]}, "2022-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 16.53], [-17.5, 16.75], [-17.2, 16.62], [-17.15, 16.75], [-17.25, 17.0], [-17.15, 17.25], [-17.25, 17.5], [-17.15, 17.75], [-17.25, 18.0], [-17.15, 18.25], [-17.25, 18.5], [-17.15, 18.75], [-17.25, 19.0], [-17.03, 19.53], [-16.68, 19.68], [-16.53, 20.03], [-16.0, 20.25], [-15.47, 20.03], [-15.32, 19.68], [-14.97, 19.53], [-14.75, 19.0], [-14.85, 18.75], [-14.82, 18.68], [-14.75, 18.65], [-14.5, 18.75], [-13.97, 18.53], [-13.75, 18.0], [-13.85, 17.75], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-14.82, 16.32], [-14.97, 15.97], [-15.32, 15.82], [-15.47, 15.47], [-16.0, 15.25], [-16.25, 15.35], [-16.32, 15.32], [-16.47, 14.97], [-17.0, 14.75], [-17.25, 14.85], [-17.5, 14.75], [-18.03, 14.97], [-18.25, 15.5], [-18.15, 15.75], [-18.25, 16.0], [-18.03, 16.53]]]]}, "2022-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 16.53], [-17.5, 16.75], [-17.2, 16.62], [-17.15, 16.75], [-17.25, 17.0], [-17.15, 17.25], [-17.25, 17.5], [-17.15, 17.75], [-17.25, 18.0], [-17.04, 18.5], [-17.25, 19.0], [-17.03, 19.53], [-16.68, 19.68], [-16.53, 20.03], [-16.0, 20.25], [-15.47, 20.03], [-15.32, 19.68], [-14.97, 19.53], [-14.75, 19.0], [-14.85, 18.75], [-14.82, 18.68], [-14.75, 18.65], [-14.5, 18.75], [-13.97, 18.53], [-13.75, 18.0], [-13.85, 17.75], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-14.82, 16.32], [-14.97, 15.97], [-15.32, 15.82], [-15.47, 15.47], [-16.0, 15.25], [-16.25, 15.35], [-16.32, 15.32], [-16.47, 14.97], [-17.0, 14.75], [-17.25, 14.85], [-17.5, 14.75], [-18.03, 14.97], [-18.25, 15.5], [-18.15, 15.75], [-18.25, 16.0], [-18.03, 16.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.801352062357694}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8354368467403397}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.07780689070455, 20.515215645534568, 20.637228162688416, 21.43898258932279]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.82746358448884, 17.25218373480169, 17.807636947938022, 17.78473641424756]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7134171319711982, -4.125284517351878, -4.074919011331976, -3.51456162971946]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9807142394827792, -5.801352062357694, -5.736291300348, -4.825128933450458]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2325846828722, -1.6010421746719599, -1.5286112809068204, -1.3367994985011717]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2903180047820655, -1.7724926342190042, -1.8843998216380482, -1.5114979036723695]}}