{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:07.864009", "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-May-27_to_2025-Jun-01_13.5_-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": 2025050000654}, "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": "May 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 71537.99031213454}, "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"]}, "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": 13.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.82, -14.32], [13.97, -13.97], [14.32, -13.82], [14.35, -13.75], [14.25, -13.5], [14.47, -12.97], [14.82, -12.82], [14.97, -12.47], [15.5, -12.25], [16.03, -12.47], [16.25, -13.0], [16.15, -13.25], [16.25, -13.5], [16.15, -13.75], [16.25, -14.0], [16.03, -14.53], [15.68, -14.68], [15.65, -14.75], [15.75, -15.0], [15.65, -15.25], [15.75, -15.5], [15.65, -15.75], [15.75, -16.0], [15.53, -16.53], [15.18, -16.68], [15.15, -16.75], [15.25, -17.0], [15.03, -17.53], [14.5, -17.75], [14.25, -17.65], [14.0, -17.75], [13.75, -17.65], [13.5, -17.75], [12.97, -17.53], [12.75, -17.0], [12.85, -16.75], [12.75, -16.5], [12.96, -16.0], [12.75, -15.5], [12.85, -15.25], [12.75, -15.0], [12.97, -14.47], [13.5, -14.25], [13.75, -14.35], [13.82, -14.32]]]]}}, "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": {"2025-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, -16.5], [12.96, -16.0], 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9537052628631955}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0349210704170564}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.01660817464193, 17.768269687228724, 17.951930406358542, 17.082361687554283, 16.869524892171285, 17.212970987955714]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.423804219563806, 13.771694437662802, 14.1840810139974, 14.256440734863304, 14.347481028238974, 17.0090321858724]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0325598011307426, -2.2164880358256576, -1.9679227945096542, -1.9470788883749133, -1.8594706872539106, -1.9172866527438828]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4231239352697003, -2.9537052628631955, -2.5120414537427678, -2.415743065617278, -2.317317089005485, -2.1202517583984104]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5620419618973038, -1.6984296520217654, -1.5341556597732255, -1.6809226093768164, -1.6130218339746243, -1.54886162366107]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.043124363686237, -2.5944114580467112, -2.265299321906458, -2.20331360962286, -2.1135765713466568, -1.6879166335470848]}}