{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:11.260843", "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-Aug-10_to_2022-Aug-13_23.5_11.5"}, "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": 2022080000508}, "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": "August 10 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 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": 51436.855976920015}, "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": ["Central African Republic", "Chad", "Sudan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 11.5}, "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": 23.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.0, 12.25], [22.25, 12.15], [22.32, 12.18], [22.35, 12.25], [22.25, 12.5], [22.47, 13.03], [23.0, 13.25], [23.25, 13.15], [23.5, 13.25], [24.0, 13.04], [24.5, 13.25], [24.75, 13.15], [25.0, 13.25], [25.53, 13.03], [25.75, 12.5], [25.65, 12.25], [25.75, 12.0], [25.53, 11.47], [25.0, 11.25], [24.75, 11.35], [24.68, 11.32], [24.53, 10.97], [24.18, 10.82], [24.03, 10.47], [23.5, 10.25], [23.25, 10.35], [23.0, 10.25], [22.75, 10.35], [22.5, 10.25], [21.97, 10.47], [21.82, 10.82], [21.47, 10.97], [21.25, 11.5], [21.47, 12.03], [22.0, 12.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 10.97], [21.25, 11.5], [21.47, 12.03], [22.0, 12.25], [22.25, 12.15], [22.32, 12.18], [22.35, 12.25], [22.25, 12.5], [22.47, 13.03], [23.0, 13.25], [23.25, 13.15], [23.5, 13.25], [24.0, 13.04], [24.5, 13.25], [24.75, 13.15], [25.0, 13.25], [25.53, 13.03], [25.75, 12.5], [25.65, 12.25], [25.75, 12.0], [25.53, 11.47], [25.0, 11.25], [24.75, 11.35], [24.68, 11.32], [24.53, 10.97], [24.18, 10.82], [24.03, 10.47], [23.5, 10.25], [23.25, 10.35], [23.0, 10.25], [22.75, 10.35], [22.5, 10.25], [21.97, 10.47], [21.82, 10.82], [21.47, 10.97]]]]}, "2022-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 10.97], [21.25, 11.5], [21.47, 12.03], [22.0, 12.25], [22.25, 12.15], [22.32, 12.18], [22.35, 12.25], [22.25, 12.5], [22.47, 13.03], [23.0, 13.25], [23.25, 13.15], [23.5, 13.25], [24.0, 13.04], [24.5, 13.25], [24.75, 13.15], [25.0, 13.25], [25.53, 13.03], [25.75, 12.5], [25.65, 12.25], [25.75, 12.0], [25.53, 11.47], [25.0, 11.25], [24.75, 11.35], [24.68, 11.32], [24.53, 10.97], [24.18, 10.82], [24.03, 10.47], [23.5, 10.25], [23.25, 10.35], [23.0, 10.25], [22.75, 10.35], [22.5, 10.25], [21.97, 10.47], [21.82, 10.82], [21.47, 10.97]]]]}, "2022-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 10.97], [21.25, 11.5], [21.47, 12.03], [22.0, 12.25], [22.25, 12.15], [22.32, 12.18], [22.35, 12.25], [22.25, 12.5], [22.47, 13.03], [23.0, 13.25], [23.25, 13.15], [23.5, 13.25], [24.0, 13.04], [24.5, 13.25], [24.75, 13.15], [25.0, 13.25], [25.53, 13.03], [25.75, 12.5], [25.65, 12.25], [25.75, 12.0], [25.53, 11.47], [25.0, 11.25], [24.75, 11.35], [24.68, 11.32], [24.53, 10.97], [24.18, 10.82], [24.03, 10.47], [23.5, 10.25], [23.25, 10.35], [23.0, 10.25], [22.75, 10.35], [22.5, 10.25], [21.97, 10.47], [21.82, 10.82], [21.47, 10.97]]]]}, "2022-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.0, 11.75], [22.47, 11.97], [22.25, 12.5], [22.47, 13.03], [23.0, 13.25], [23.25, 13.15], [23.5, 13.25], [24.03, 13.03], [24.25, 12.5], [24.03, 11.97], [23.5, 11.75], [23.25, 11.85], [23.0, 11.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.578474579131864}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.565213512351629}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.316793403459485, 23.22965163190065, 23.033137701457747, 22.043688244741247]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.250936903933223, 21.244526028883058, 21.200615099650747, 21.309474133337062]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.092930408808005, -1.2177120794471132, -1.455613656354879, -0.9649808481331945]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.578474579131864, -1.4265747788147678, -1.8057159675911976, -0.9990995527132327]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.491732942307452, -1.4937813187263607, -1.8397337455290845, -1.351738672193778]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.367694128763458, -1.8344291449977106, -2.2135198408920385, -1.4013978481804312]}}