{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:42.538236", "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-05_to_2026-Mar-07_17.0_-19.5"}, "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": 2026030000202}, "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 05 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 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": 52709.68325943748}, "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": ["Namibia"]}, "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": -19.5}, "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": 17.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.25, -18.5], [15.35, -18.25], [15.25, -18.0], [15.47, -17.47], [16.0, -17.25], [16.25, -17.35], [16.5, -17.25], [17.0, -17.46], [17.32, -17.32], [17.47, -16.97], [18.0, -16.75], [18.53, -16.97], [18.75, -17.5], [18.65, -17.75], [18.75, -18.0], [18.65, -18.25], [18.75, -18.5], [18.53, -19.03], [18.18, -19.18], [18.15, -19.25], [18.25, -19.5], [18.03, -20.03], [17.5, -20.25], [17.25, -20.15], [17.0, -20.25], [16.75, -20.15], [16.5, -20.25], [16.25, -20.15], [16.0, -20.25], [15.47, -20.03], [15.25, -19.5], [15.35, -19.25], [15.25, -19.0], [15.35, -18.75], [15.25, -18.5]]]]}}, "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": {"2026-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -19.0], [15.35, -18.75], [15.25, -18.5], [15.35, -18.25], [15.25, -18.0], [15.47, -17.47], [16.0, -17.25], [16.25, -17.35], [16.5, -17.25], [17.0, -17.46], [17.32, -17.32], [17.47, -16.97], [18.0, -16.75], [18.53, -16.97], [18.75, -17.5], [18.65, -17.75], [18.75, -18.0], [18.65, -18.25], [18.75, -18.5], [18.53, -19.03], [18.18, -19.18], [18.15, -19.25], [18.25, -19.5], [18.03, -20.03], [17.5, -20.25], [17.25, -20.15], [17.0, -20.25], [16.75, -20.15], [16.5, -20.25], [16.25, -20.15], [16.0, -20.25], [15.47, -20.03], [15.25, -19.5], [15.35, -19.25], [15.25, -19.0]]]]}, "2026-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -19.0], [15.35, -18.75], [15.25, -18.5], [15.35, -18.25], [15.25, -18.0], [15.47, -17.47], [16.0, -17.25], [16.25, -17.35], [16.5, -17.25], [17.0, -17.46], [17.32, -17.32], [17.47, -16.97], [18.0, -16.75], [18.53, -16.97], [18.75, -17.5], [18.65, -17.75], [18.75, -18.0], [18.65, -18.25], [18.75, -18.5], [18.53, -19.03], [18.18, -19.18], [18.15, -19.25], [18.25, -19.5], [18.03, -20.03], [17.5, -20.25], [17.25, -20.15], [17.0, -20.25], [16.75, -20.15], [16.5, -20.25], [16.25, -20.15], [16.0, -20.25], [15.47, -20.03], [15.25, -19.5], [15.35, -19.25], [15.25, -19.0]]]]}, "2026-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -19.0], [15.35, -18.75], [15.25, -18.5], [15.35, -18.25], [15.25, -18.0], [15.47, -17.47], [16.0, -17.25], [16.25, -17.35], [16.5, -17.25], [17.0, -17.46], [17.32, -17.32], [17.47, -16.97], [18.0, -16.75], [18.53, -16.97], [18.75, -17.5], [18.65, -17.75], [18.75, -18.0], [18.65, -18.25], [18.75, -18.5], [18.53, -19.03], [18.18, -19.18], [18.15, -19.25], [18.25, -19.5], [18.03, -20.03], [17.5, -20.25], [17.25, -20.15], [17.0, -20.25], [16.75, -20.15], [16.5, -20.25], [16.25, -20.15], [16.0, -20.25], [15.47, -20.03], [15.25, -19.5], [15.35, -19.25], [15.25, -19.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.010008179511715}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2255402664212403}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.2973406473796, 20.972227421513253, 21.470337168375636]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.480975087483728, 19.444146728515648, 19.81901067097982]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.173971643105653, -3.4949596358896966, -3.0076895202683716]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.0611733214244055, -5.010008179511715, -4.030776692954873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5108171662297123, -1.624343832156565, -1.4030154546702018]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0794544251497546, -2.2921181659308445, -2.016888849684756]}}