{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:28.501764", "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-25_to_2022-Apr-27_25.5_-29.5"}, "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": 2022040000827}, "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 25 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2022"}, "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": 51018.418004244675}, "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": ["South 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": []}, "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": -29.5}, "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": 25.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[23.47, -28.47], [24.0, -28.25], [24.25, -28.35], [24.5, -28.25], [24.75, -28.35], [24.82, -28.32], [24.97, -27.97], [25.5, -27.75], [25.75, -27.85], [26.0, -27.75], [26.53, -27.97], [26.75, -28.5], [26.65, -28.75], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.65, -29.75], [26.68, -29.82], [27.03, -29.97], [27.18, -30.32], [27.53, -30.47], [27.75, -31.0], [27.53, -31.53], [27.0, -31.75], [26.5, -31.54], [26.0, -31.75], [25.47, -31.53], [25.32, -31.18], [25.25, -31.15], [25.0, -31.25], [24.47, -31.03], [24.25, -30.5], [24.38, -30.2], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53], [23.25, -29.0], [23.47, -28.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [24.0, -28.25], [24.25, -28.35], [24.5, -28.25], [24.75, -28.35], [24.82, -28.32], [24.97, -27.97], [25.5, -27.75], [25.75, -27.85], [26.0, -27.75], [26.53, -27.97], [26.75, -28.5], [26.65, -28.75], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.65, -29.75], [26.68, -29.82], [27.03, -29.97], [27.18, -30.32], [27.53, -30.47], [27.75, -31.0], [27.53, -31.53], [27.0, -31.75], [26.5, -31.54], [26.0, -31.75], [25.47, -31.53], [25.32, -31.18], [25.25, -31.15], [25.0, -31.25], [24.47, -31.03], [24.25, -30.5], [24.38, -30.2], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53]]]]}, "2022-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [24.0, -28.25], [24.25, -28.35], [24.5, -28.25], [24.75, -28.35], [24.82, -28.32], [24.97, -27.97], [25.5, -27.75], [25.75, -27.85], [26.0, -27.75], [26.53, -27.97], [26.75, -28.5], [26.65, -28.75], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.65, -29.75], [26.68, -29.82], [27.03, -29.97], [27.18, -30.32], [27.53, -30.47], [27.75, -31.0], [27.53, -31.53], [27.0, -31.75], [26.5, -31.54], [26.0, -31.75], [25.47, -31.53], [25.32, -31.18], [25.25, -31.15], [25.0, -31.25], [24.47, -31.03], [24.25, -30.5], [24.38, -30.2], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53]]]]}, "2022-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [24.0, -28.25], [24.25, -28.35], [24.5, -28.25], [24.75, -28.35], [24.82, -28.32], [24.97, -27.97], [25.5, -27.75], [25.75, -27.85], [26.0, -27.75], [26.53, -27.97], [26.75, -28.5], [26.65, -28.75], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.65, -29.75], [26.68, -29.82], [27.03, -29.97], [27.18, -30.32], [27.53, -30.47], [27.75, -31.0], [27.53, -31.53], [27.0, -31.75], [26.5, -31.54], [26.0, -31.75], [25.47, -31.53], [25.32, -31.18], [25.25, -31.15], [25.0, -31.25], [24.47, -31.03], [24.25, -30.5], [24.38, -30.2], [23.97, -30.03], [23.82, -29.68], [23.47, -29.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.235324232938467}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.313145279977361}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.509586314358785, 9.974918308328654, 10.711727408103343]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.27540507042778, 7.03616343857442, 8.068916030071307]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.313334354878724, -4.71724874960508, -3.908852735448279]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.001732210692978, -5.235324232938467, -4.151406016938381]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6056196825993465, -1.7013834698836987, -1.4561743829191982]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.887579998427751, -1.8240396477455068, -1.5700337190953424]}}