{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:48.401221", "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": "2023-Aug-10_to_2023-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": 2023080000361}, "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 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 2023"}, "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": 72531.2795646421}, "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": ["Angola", "Congo, The Democratic Republic of the", "Zambia"]}, "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": 23.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.35, -11.75], [22.25, -11.5], [22.47, -10.97], [22.82, -10.82], [22.97, -10.47], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.5, -10.46], [25.0, -10.25], [25.53, -10.47], [25.75, -11.0], [25.65, -11.25], [25.68, -11.32], [26.03, -11.47], [26.25, -12.0], [26.03, -12.53], [25.68, -12.68], [25.53, -13.03], [25.18, -13.18], [25.03, -13.53], [24.5, -13.75], [24.25, -13.65], [24.18, -13.68], [24.03, -14.03], [23.5, -14.25], [22.97, -14.03], [22.82, -13.68], [22.47, -13.53], [22.25, -13.0], [22.35, -12.75], [22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.35, -11.75]]]]}}, "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": {"2023-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -11.5], [22.47, -10.97], [23.0, -10.75], [23.25, -10.85], [23.32, -10.82], [23.47, -10.47], [24.0, -10.25], [24.5, -10.46], [25.0, -10.25], [25.53, -10.47], [25.75, -11.0], [25.65, -11.25], [25.68, -11.32], [26.03, -11.47], [26.25, -12.0], [26.03, -12.53], [25.68, -12.68], [25.53, -13.03], [25.18, -13.18], [25.03, -13.53], [24.5, -13.75], [24.25, -13.65], [24.0, -13.75], [23.75, -13.65], [23.5, -13.75], [22.97, -13.53], [22.75, -13.0], [22.85, -12.75], [22.82, -12.68], [22.47, -12.53], [22.25, -12.0], [22.35, -11.75], [22.25, -11.5]]]]}, "2023-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.35, -11.75], [22.25, -11.5], [22.47, -10.97], [22.82, -10.82], [22.97, -10.47], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.5, -10.46], [25.0, -10.25], [25.53, -10.47], [25.75, -11.0], [25.65, -11.25], [25.68, -11.32], [26.03, -11.47], [26.25, -12.0], [26.03, -12.53], [25.68, -12.68], [25.53, -13.03], [25.18, -13.18], [25.03, -13.53], [24.5, -13.75], [24.25, -13.65], [24.18, -13.68], [24.03, -14.03], [23.5, -14.25], [22.97, -14.03], [22.82, -13.68], [22.47, -13.53], [22.25, -13.0], [22.35, -12.75], [22.25, -12.5]]]]}, "2023-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.35, -11.75], [22.25, -11.5], [22.47, -10.97], [22.82, -10.82], [22.97, -10.47], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.5, -10.46], [25.0, -10.25], [25.53, -10.47], [25.75, -11.0], [25.65, -11.25], [25.68, -11.32], [26.03, -11.47], [26.25, -12.0], [26.03, -12.53], [25.68, -12.68], [25.53, -13.03], [25.18, -13.18], [25.03, -13.53], [24.5, -13.75], [24.25, -13.65], [24.18, -13.68], [24.03, -14.03], [23.5, -14.25], [22.97, -14.03], [22.82, -13.68], [22.47, -13.53], [22.25, -13.0], [22.35, -12.75], [22.25, -12.5]]]]}, "2023-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.35, -11.75], [22.25, -11.5], [22.47, -10.97], [22.82, -10.82], [22.97, -10.47], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.53, -10.47], [24.68, -10.82], [24.75, -10.85], [25.0, -10.75], [25.53, -10.97], [25.68, -11.32], [26.03, -11.47], [26.25, -12.0], [26.03, -12.53], [25.68, -12.68], [25.53, -13.03], [25.18, -13.18], [25.03, -13.53], [24.5, -13.75], [24.25, -13.65], [24.18, -13.68], [24.03, -14.03], [23.5, -14.25], [22.97, -14.03], [22.82, -13.68], [22.47, -13.53], [22.25, -13.0], [22.35, -12.75], [22.25, -12.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.739688126683177}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.251122642986832}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.307850338605476, 19.265404568615622, 19.36768398523418, 19.349056398602556]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.783533424427617, 17.584775788685818, 17.76082060879213, 17.86667708888399]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0044642721594896, -2.2885983185774847, -2.292112472682618, -2.383731133842149]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3970866082706834, -2.5361185970690485, -2.6103585666515983, -2.739688126683177]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4512777773328598, -1.602667527774593, -1.5495220276892603, -1.59572412122057]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6381866517143824, -1.7335599256052536, -1.8385811520074469, -1.8012454634184547]}}