{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:41.532454", "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-03_to_2026-Mar-06_23.5_-23.0"}, "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": 2026030000139}, "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 03 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 06 2026"}, "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": 76913.18559755094}, "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"]}, "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": -23.0}, "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": 22.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.35, -22.25], [22.25, -22.0], [22.47, -21.47], [22.82, -21.32], [22.97, -20.97], [23.5, -20.75], [24.03, -20.97], [24.18, -21.32], [24.25, -21.35], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.25, -21.35], [25.5, -21.25], [26.03, -21.47], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.03, -24.03], [25.68, -24.18], [25.53, -24.53], [25.0, -24.75], [24.75, -24.65], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.47, -24.53], [23.32, -24.18], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.25, -23.5], [22.35, -23.25], [22.25, -23.0], [22.35, -22.75], [22.25, -22.5], [22.35, -22.25]]]]}}, "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": {"2026-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.47, -21.47], [22.82, -21.32], [22.97, -20.97], [23.5, -20.75], [24.03, -20.97], [24.25, -21.5], [24.15, -21.75], [24.18, -21.82], [24.53, -21.97], [24.75, -22.5], [24.65, -22.75], [24.68, -22.82], [25.03, -22.97], [25.25, -23.5], [25.03, -24.03], [24.68, -24.18], [24.53, -24.53], [24.0, -24.75], [23.47, -24.53], [23.32, -24.18], [22.97, -24.03], [22.82, -23.68], [22.47, -23.53], [22.25, -23.0], [22.35, -22.75], [22.25, -22.5]]]]}, "2026-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -23.0], [22.35, -22.75], [22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.47, -21.47], [22.82, -21.32], [22.97, -20.97], [23.5, -20.75], [24.03, -20.97], [24.18, -21.32], [24.25, -21.35], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.25, -21.35], [25.5, -21.25], [26.03, -21.47], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.03, -24.03], [25.68, -24.18], [25.53, -24.53], [25.0, -24.75], [24.75, -24.65], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.47, -24.53], [23.32, -24.18], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.25, -23.5], [22.35, -23.25], [22.25, -23.0]]]]}, "2026-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -23.0], [22.35, -22.75], [22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.47, -21.47], [22.82, -21.32], [22.97, -20.97], [23.5, -20.75], [24.03, -20.97], [24.18, -21.32], [24.25, -21.35], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.25, -21.35], [25.5, -21.25], [26.03, -21.47], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.03, -24.03], [25.68, -24.18], [25.53, -24.53], [25.0, -24.75], [24.75, -24.65], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.47, -24.53], [23.32, -24.18], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.25, -23.5], [22.35, -23.25], [22.25, -23.0]]]]}, "2026-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -23.0], [22.35, -22.75], [22.25, -22.5], [22.47, -21.97], [22.82, -21.82], [22.97, -21.47], [23.5, -21.25], [23.75, -21.35], [24.0, -21.25], [24.25, -21.35], [24.5, -21.25], [24.75, -21.35], [25.0, -21.25], [25.25, -21.35], [25.5, -21.25], [26.03, -21.47], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.03, -24.03], [25.68, -24.18], [25.53, -24.53], [25.0, -24.75], [24.75, -24.65], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.47, -24.53], [23.32, -24.18], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.25, -23.5], [22.35, -23.25], [22.25, -23.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.967620394673759}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7269142015919132}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.304753875732388, 21.730443243332843, 20.867341189914328, 21.31900349934898]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.07461064656576, 21.144581095377646, 20.363462066650413, 19.797174072265648]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1700188597006593, -3.446956386779917, -4.261685180785763, -3.7413015618429633]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5880734917501513, -3.963330364795297, -4.967620394673759, -4.3159573632907495]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2052257484137778, -1.3681990345724488, -1.747936130793365, -1.6031680110667426]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.320094160577093, -1.5122001372351495, -1.9898465465443846, -2.049406875679462]}}