{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:39.315880", "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-Nov-01_to_2025-Nov-05_16.0_-19.0"}, "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": 2025110000025}, "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": "November 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 05 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 164323.00775068568}, "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", "Namibia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -19.0}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.25, -15.85], [14.32, -15.82], [14.47, -15.47], [15.0, -15.25], [15.25, -15.35], [15.5, -15.25], [15.75, -15.35], [16.0, -15.25], [16.53, -15.47], [16.68, -15.82], [17.03, -15.97], [17.18, -16.32], [17.25, -16.35], [17.5, -16.25], [17.75, -16.35], [18.0, -16.25], [18.53, -16.47], [18.75, -17.0], [18.53, -17.53], [18.18, -17.68], [18.15, -17.75], [18.18, -17.82], [18.53, -17.97], [18.68, -18.32], [19.03, -18.47], [19.25, -19.0], [19.15, -19.25], [19.25, -19.5], [19.03, -20.03], [18.68, -20.18], [18.65, -20.25], [18.75, -20.5], [18.53, -21.03], [18.18, -21.18], [18.03, -21.53], [17.5, -21.75], [16.97, -21.53], [16.82, -21.18], [16.75, -21.15], [16.5, -21.25], [15.97, -21.03], [15.75, -20.5], [15.85, -20.25], [15.82, -20.18], [15.47, -20.03], [15.32, -19.68], [14.97, -19.53], [14.75, -19.0], [14.85, -18.75], [14.82, -18.68], [14.47, -18.53], [14.32, -18.18], [13.97, -18.03], [13.75, -17.5], [13.85, -17.25], [13.82, -17.18], [13.47, -17.03], [13.25, -16.5], [13.47, -15.97], [14.0, -15.75], [14.25, -15.85]]]]}}, "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": {"2025-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, -16.47], [17.0, -16.25], [17.53, -16.47], [17.75, -17.0], [17.53, -17.53], [17.0, -17.75], [16.47, -17.53], [16.25, -17.0], [16.47, -16.47]]]]}, "2025-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, -19.75], [15.47, -19.53], [15.25, -19.0], [15.47, -18.47], [16.0, -18.25], [16.53, -18.47], [16.75, -19.0], [16.53, -19.53], [16.0, -19.75]]], [[[16.25, -17.0], [16.47, -16.47], [17.0, -16.25], [17.25, -16.35], [17.5, -16.25], [17.75, -16.35], [18.0, -16.25], [18.53, -16.47], [18.75, -17.0], [18.53, -17.53], [18.18, -17.68], [18.15, -17.75], [18.18, -17.82], [18.53, -17.97], [18.75, -18.5], [18.65, -18.75], [18.75, -19.0], [18.53, -19.53], [18.0, -19.75], [17.47, -19.53], [17.32, -19.18], [16.97, -19.03], [16.75, -18.5], [16.85, -18.25], [16.75, -18.0], [16.85, -17.75], [16.82, -17.68], [16.47, -17.53], [16.25, -17.0]]]]}, "2025-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, -17.03], [13.25, -16.5], [13.47, -15.97], [14.0, -15.75], [14.25, -15.85], [14.32, -15.82], [14.47, -15.47], [15.0, -15.25], [15.25, -15.35], [15.5, -15.25], [15.75, -15.35], [16.0, -15.25], [16.53, -15.47], [16.68, -15.82], [17.03, -15.97], [17.18, -16.32], [17.25, -16.35], [17.5, -16.25], [17.75, -16.35], [18.0, -16.25], [18.53, -16.47], [18.75, -17.0], [18.53, -17.53], [18.18, -17.68], [18.15, -17.75], [18.18, -17.82], [18.53, -17.97], [18.68, -18.32], [19.03, -18.47], [19.25, -19.0], [19.15, -19.25], [19.25, -19.5], [19.03, -20.03], [18.68, -20.18], [18.65, -20.25], [18.75, -20.5], [18.53, -21.03], [18.18, -21.18], [18.03, -21.53], [17.5, -21.75], [16.97, -21.53], [16.82, -21.18], [16.75, -21.15], [16.5, -21.25], [15.97, -21.03], [15.75, -20.5], [15.85, -20.25], [15.82, -20.18], [15.47, 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-21.53], [16.82, -21.18], [16.75, -21.15], [16.5, -21.25], [15.97, -21.03], [15.75, -20.5], [15.85, -20.25], [15.82, -20.18], [15.47, -20.03], [15.32, -19.68], [14.97, -19.53], [14.75, -19.0], [14.85, -18.75], [14.82, -18.68], [14.47, -18.53], [14.32, -18.18], [13.97, -18.03], [13.75, -17.5], [13.85, -17.25], [13.82, -17.18], [13.47, -17.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.163011910876321}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.45315145984614}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.85921122233077, 23.592535202591534, 22.365833536783896, 21.256320299421077, 22.616571188872683]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.85921122233077, 23.308075205485068, 19.0439442952474, 18.690501149495446, 20.747163391113304]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8099626966259166, -3.3690990518434836, -4.208938794874451, -5.351144359568929, -3.958584804925055]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8099626966259166, -3.695577412171019, -5.919826740196186, -7.163011910876321, -5.341794716921129]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5874015525650311, -1.4042641739985045, -1.8491446692207698, -2.404078286027738, -1.8288718446303662]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5874015525650311, -1.5559289495070867, -2.490606921857557, -3.140530160856092, -2.410421015288862]}}