{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:13.821358", "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": "2025-Dec-10_to_2025-Dec-13_40.5_-15.0"}, "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": 2025120000392}, "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": "December 10 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 13 2025"}, "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": 71757.41956270282}, "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": ["Mozambique"]}, "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": -15.0}, "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": 40.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "40.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 36.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 41.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[37.25, -15.65], [37.0, -15.75], [36.47, -15.53], [36.32, -15.18], [35.97, -15.03], [35.75, -14.5], [35.85, -14.25], [35.75, -14.0], [35.97, -13.47], [36.32, -13.32], [36.47, -12.97], [37.0, -12.75], [37.25, -12.85], [37.5, -12.75], [38.03, -12.97], [38.18, -13.32], [38.53, -13.47], [38.68, -13.82], [39.03, -13.97], [39.18, -14.32], [39.25, -14.35], [39.32, -14.32], [39.47, -13.97], [40.0, -13.75], [40.53, -13.97], [40.68, -14.32], [41.03, -14.47], [41.25, -15.0], [41.15, -15.25], [41.18, -15.32], [41.53, -15.47], [41.75, -16.0], [41.53, -16.53], [41.0, -16.75], [40.47, -16.53], [40.32, -16.18], [40.25, -16.15], [40.0, -16.25], [39.47, -16.03], [39.32, -15.68], [39.25, -15.65], [39.18, -15.68], [39.03, -16.03], [38.5, -16.25], [37.97, -16.03], [37.82, -15.68], [37.75, -15.65], [37.5, -15.75], [37.25, -15.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.97, -14.47], [37.5, -14.25], [38.03, -14.47], [38.25, -15.0], [38.03, -15.53], [37.5, -15.75], [36.97, -15.53], [36.75, -15.0], [36.97, -14.47]]]]}, "2025-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.75, -14.0], [35.97, -13.47], [36.32, -13.32], [36.47, -12.97], [37.0, -12.75], [37.25, -12.85], [37.5, -12.75], [38.03, -12.97], [38.18, -13.32], [38.53, -13.47], [38.68, -13.82], [39.03, -13.97], [39.18, -14.32], [39.25, -14.35], [39.32, -14.32], [39.47, -13.97], [40.0, -13.75], [40.53, -13.97], [40.68, -14.32], [41.03, -14.47], [41.25, -15.0], [41.15, -15.25], [41.18, -15.32], [41.53, -15.47], [41.75, -16.0], [41.53, -16.53], [41.0, -16.75], [40.47, -16.53], [40.32, -16.18], [40.25, -16.15], [40.0, -16.25], [39.47, -16.03], [39.32, -15.68], [39.25, -15.65], [39.18, -15.68], [39.03, -16.03], [38.5, -16.25], [37.97, -16.03], [37.82, -15.68], [37.75, -15.65], [37.5, -15.75], [37.25, -15.65], [37.0, -15.75], [36.47, -15.53], [36.32, -15.18], [35.97, -15.03], [35.75, -14.5], [35.85, -14.25], [35.75, -14.0]]]]}, "2025-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.75, -14.0], [35.97, -13.47], [36.32, -13.32], [36.47, -12.97], [37.0, -12.75], [37.25, -12.85], [37.5, -12.75], [38.03, -12.97], [38.18, -13.32], [38.53, -13.47], [38.68, -13.82], [39.03, -13.97], [39.18, -14.32], [39.25, -14.35], [39.32, -14.32], [39.47, -13.97], [40.0, -13.75], [40.53, -13.97], [40.68, -14.32], [41.03, -14.47], [41.25, -15.0], [41.15, -15.25], [41.18, -15.32], [41.53, -15.47], [41.75, -16.0], [41.53, -16.53], [41.0, -16.75], [40.47, -16.53], [40.32, -16.18], [40.25, -16.15], [40.0, -16.25], [39.47, -16.03], [39.32, -15.68], [39.25, -15.65], [39.18, -15.68], [39.03, -16.03], [38.5, -16.25], [37.97, -16.03], [37.82, -15.68], [37.75, -15.65], [37.5, -15.75], [37.25, -15.65], [37.0, -15.75], [36.47, -15.53], [36.32, -15.18], [35.97, -15.03], [35.75, -14.5], [35.85, -14.25], [35.75, -14.0]]]]}, "2025-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.75, -14.0], [35.97, -13.47], [36.32, -13.32], [36.47, -12.97], [37.0, -12.75], [37.25, -12.85], [37.5, -12.75], [38.03, -12.97], [38.18, -13.32], [38.53, -13.47], [38.68, -13.82], [39.03, -13.97], [39.18, -14.32], [39.25, -14.35], [39.32, -14.32], [39.47, -13.97], [40.0, -13.75], [40.53, -13.97], [40.68, -14.32], [41.03, -14.47], [41.25, -15.0], [41.15, -15.25], [41.18, -15.32], [41.53, -15.47], [41.75, -16.0], [41.53, -16.53], [41.0, -16.75], [40.47, -16.53], [40.32, -16.18], [40.25, -16.15], [40.0, -16.25], [39.47, -16.03], [39.32, -15.68], [39.25, -15.65], [39.18, -15.68], [39.03, -16.03], [38.5, -16.25], [37.97, -16.03], [37.82, -15.68], [37.75, -15.65], [37.5, -15.75], [37.25, -15.65], [37.0, -15.75], [36.47, -15.53], [36.32, -15.18], [35.97, -15.03], [35.75, -14.5], [35.85, -14.25], [35.75, -14.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.202890931437537}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2407892311242787}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.40787277221682, 23.71275227864578, 23.314968363444052, 23.471798621283654]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.40787277221682, 21.935571289062523, 21.738765970865927, 21.29239934285482]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.93887466774396, -2.1014312608102963, -2.416058937724813, -2.217457268311906]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.93887466774396, -2.7543982270464085, -3.202890931437537, -3.056789264075917]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1747312468202766, -1.4150221101688576, -1.6854796022892824, -1.5156568117968883]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1747312468202766, -1.6531419051399208, -2.432995884111814, -1.8975809122269656]}}