{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:42.620528", "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-Mar-06_to_2026-Mar-08_21.0_-26.5"}, "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": 2026030000216}, "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": "March 06 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 08 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 87546.87653768592}, "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": ["Botswana", "South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -26.5}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.65, -27.25], [22.75, -27.5], [22.53, -28.03], [22.18, -28.18], [22.15, -28.25], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [22.75, -29.35], [23.0, -29.25], [23.53, -29.47], [23.75, -30.0], [23.53, -30.53], [23.18, -30.68], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.32, -30.18], [20.97, -30.03], [20.75, -29.5], [20.85, -29.25], [20.82, -29.18], [20.47, -29.03], [20.32, -28.68], [19.97, -28.53], [19.82, -28.18], [19.47, -28.03], [19.25, -27.5], [19.35, -27.25], [19.25, -27.0], [19.35, -26.75], [19.25, -26.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -27.0], [19.35, -26.75], [19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.65, -27.25], [22.75, -27.5], [22.53, -28.03], [22.18, -28.18], [22.15, -28.25], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [22.75, -29.35], [23.0, -29.25], [23.53, -29.47], [23.75, -30.0], [23.53, -30.53], [23.18, -30.68], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.32, -30.18], [20.97, -30.03], [20.75, -29.5], [20.85, -29.25], [20.82, -29.18], [20.47, -29.03], [20.32, -28.68], [19.97, -28.53], [19.82, -28.18], [19.47, -28.03], [19.25, -27.5], [19.35, -27.25], [19.25, -27.0]]]]}, "2026-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -27.0], [19.35, -26.75], [19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.65, -27.25], [22.75, -27.5], [22.53, -28.03], [22.18, -28.18], [22.15, -28.25], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [22.75, -29.35], [23.0, -29.25], [23.53, -29.47], [23.75, -30.0], [23.53, -30.53], [23.18, -30.68], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.32, -30.18], [20.97, -30.03], [20.75, -29.5], [20.85, -29.25], [20.82, -29.18], [20.47, -29.03], [20.32, -28.68], [19.97, -28.53], [19.82, -28.18], [19.47, -28.03], [19.25, -27.5], [19.35, -27.25], [19.25, -27.0]]]]}, "2026-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -27.0], [19.35, -26.75], [19.25, -26.5], [19.47, -25.97], [19.82, -25.82], [19.85, -25.75], [19.75, -25.5], [19.97, -24.97], [20.5, -24.75], [20.75, -24.85], [21.0, -24.75], [21.53, -24.97], [21.68, -25.32], [22.03, -25.47], [22.18, -25.82], [22.53, -25.97], [22.75, -26.5], [22.65, -26.75], [22.75, -27.0], [22.65, -27.25], [22.75, -27.5], [22.53, -28.03], [22.18, -28.18], [22.15, -28.25], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [22.75, -29.35], [23.0, -29.25], [23.53, -29.47], [23.75, -30.0], [23.53, -30.53], [23.18, -30.68], [23.03, -31.03], [22.5, -31.25], [22.25, -31.15], [22.0, -31.25], [21.47, -31.03], [21.25, -30.5], [21.35, -30.25], [21.32, -30.18], [20.97, -30.03], [20.75, -29.5], [20.85, -29.25], [20.82, -29.18], [20.47, -29.03], [20.32, -28.68], [19.97, -28.53], [19.82, -28.18], [19.47, -28.03], [19.25, -27.5], [19.35, -27.25], [19.25, -27.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.658608321193469}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.225339050156005}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.05261637369796, 19.450490570068382, 21.91129582722982]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.194228108723962, 16.738769785563193, 17.451795196533226]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.287081724527701, -6.904457646321067, -4.484477779619246]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.644126136022862, -7.658608321193469, -6.949278011625097]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5332370826769166, -2.609343383461661, -1.757199628736841]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9261500256364363, -3.10045347168272, -2.4069563374832645]}}