{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:13.947228", "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-Jan-05_to_2025-Jan-09_24.0_-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": 2025010000184}, "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": "January 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 09 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": 91229.48702241539}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-Africa"]}, "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": 24.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "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": -24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -23.03], [21.75, -22.5], [21.97, -21.97], [22.5, 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[25.25, -24.65], [25.18, -24.68], [25.03, -25.03], [24.5, -25.25], [23.97, -25.03], [23.82, -24.68], [23.47, -24.53], [23.32, -24.18], [22.97, -24.03], [22.75, -23.5], [22.85, -23.25], [22.82, -23.18], [22.75, -23.15], [22.5, -23.25], [21.97, -23.03], [21.75, -22.5], [21.85, -22.25], [21.75, -22.0], [21.97, -21.47]]]]}, "2025-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -21.47], [22.32, -21.32], [22.47, -20.97], [23.0, -20.75], [23.25, -20.85], [23.5, -20.75], [23.75, -20.85], [24.0, -20.75], [24.25, -20.85], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.53, -20.97], [25.75, -21.5], [25.65, -21.75], [25.68, -21.82], [26.03, -21.97], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.15, -23.75], [26.25, -24.0], [26.03, -24.53], [25.5, -24.75], [25.25, -24.65], [25.18, -24.68], [25.03, -25.03], [24.5, -25.25], [23.97, -25.03], [23.82, -24.68], [23.47, -24.53], [23.32, -24.18], [22.97, -24.03], [22.75, -23.5], [22.85, -23.25], [22.82, -23.18], [22.75, -23.15], [22.5, -23.25], [21.97, -23.03], [21.75, -22.5], [21.85, -22.25], [21.75, -22.0], [21.97, -21.47]]]]}, "2025-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -21.47], [22.32, -21.32], [22.47, -20.97], [23.0, -20.75], [23.25, -20.85], [23.5, -20.75], [23.75, -20.85], [24.0, -20.75], [24.25, -20.85], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.53, -20.97], [25.75, -21.5], [25.65, -21.75], [25.68, -21.82], [26.03, -21.97], [26.25, -22.5], [26.04, -23.0], [26.25, -23.5], [26.15, -23.75], [26.25, -24.0], [26.03, -24.53], [25.5, -24.75], [25.25, -24.65], [25.0, -24.75], [24.5, -24.54], [24.0, -24.75], [23.47, -24.53], [23.25, -24.0], [23.35, -23.75], [23.32, -23.68], [22.97, -23.53], [22.82, -23.18], [22.75, -23.15], [22.5, -23.25], [21.97, -23.03], [21.75, -22.5], [21.85, -22.25], [21.75, -22.0], [21.97, -21.47]]]]}, "2025-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, -22.47], [25.0, -22.25], [25.53, -22.47], [25.68, -22.82], [26.03, -22.97], [26.25, -23.5], [26.03, -24.03], [25.5, -24.25], [25.25, -24.15], [25.0, -24.25], [24.47, -24.03], [24.25, -23.5], [24.35, -23.25], [24.25, -23.0], [24.47, -22.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.607535346756549}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.814227441093789}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.67825215657558, 22.35428644816085, 22.33303604125973, 22.62999785850792, 22.728784603542806]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.73627624511721, 21.07059758504232, 21.35631586710616, 21.784263865153036, 22.349362945556663]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.667038766114424, -3.901935103830162, -3.9526637158951594, -3.6886313723578414, -3.303001255042375]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.066808282716352, -4.476125072430534, -4.489562063026142, -4.607535346756549, -3.4187475119284727]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3871202488085892, -1.5123565610719325, -1.5397832997110206, -1.4268633701919853, -1.3213911077889575]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5139447461522129, -1.7604690828666019, -1.742901042797143, -1.7427154139494085, -1.3747299670455209]}}