{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:18:46.796966", "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": "2020-Feb-10_to_2020-Feb-13_39.0_16.5"}, "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": 2020020000401}, "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 10 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 13 2020"}, "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": 73976.81070067824}, "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": ["Eritrea", "Sudan"]}, "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": []}, "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": 16.5}, "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": 39.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 36.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.96, 17.5], [35.75, 18.0], [35.97, 18.53], [36.32, 18.68], 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18.75], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.18, 17.68], [39.53, 17.53], [39.75, 17.0], [39.65, 16.75], [39.75, 16.5], [39.65, 16.25], [39.68, 16.18], [40.03, 16.03], [40.18, 15.68], [40.53, 15.53], [40.75, 15.0], [40.53, 14.47], [40.0, 14.25], [39.47, 14.47], [39.32, 14.82], [38.97, 14.97], [38.82, 15.32], [38.75, 15.35], [38.5, 15.25], [38.2, 15.38], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.47, 14.97], [36.25, 15.5], [36.35, 15.75], [36.32, 15.82], [35.97, 15.97], [35.75, 16.5], [35.85, 16.75], [35.75, 17.0], [35.96, 17.5]]]]}, "2020-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.96, 17.5], [35.75, 18.0], [35.97, 18.53], [36.32, 18.68], [36.47, 19.03], [37.0, 19.25], [37.53, 19.03], [37.68, 18.68], [37.75, 18.65], [38.0, 18.75], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.18, 17.68], [39.53, 17.53], [39.75, 17.0], [39.65, 16.75], [39.75, 16.5], [39.65, 16.25], [39.68, 16.18], [40.03, 16.03], [40.18, 15.68], [40.53, 15.53], [40.75, 15.0], [40.53, 14.47], [40.0, 14.25], [39.47, 14.47], [39.32, 14.82], [38.97, 14.97], [38.82, 15.32], [38.75, 15.35], [38.5, 15.25], [38.2, 15.38], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.47, 14.97], [36.25, 15.5], [36.35, 15.75], [36.32, 15.82], [35.97, 15.97], [35.75, 16.5], [35.85, 16.75], [35.75, 17.0], [35.96, 17.5]]]]}, "2020-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.0, 17.25], [39.53, 17.03], [39.75, 16.5], [39.65, 16.25], [39.75, 16.0], [39.53, 15.47], [39.0, 15.25], [38.75, 15.35], [38.5, 15.25], [37.97, 15.47], [37.75, 16.0], [37.97, 16.53], [38.32, 16.68], [38.47, 17.03], [39.0, 17.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.723660379212276}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.737255022192311}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.156833265098214, 18.895934598717076, 19.08176881945559, 19.439387152921313]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.367781045816685, 14.506679041911411, 13.996875090476408, 16.148133478017314]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0905780145505233, -4.196121687899617, -4.068677392365173, -2.3249291176585416]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5940177077931708, -5.723660379212276, -5.381254904994705, -2.713185825884807]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4091549698983308, -1.9118523428345993, -1.8438399520923607, -1.391343943017388]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6810104245943511, -2.271773572383986, -2.5301850659516485, -1.4425727275962714]}}