{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:33.170175", "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": "2021-Dec-23_to_2021-Dec-28_16.0_-24.0"}, "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": 2021120000766}, "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 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 28 2021"}, "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": 61697.66900699053}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -24.0}, "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": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, -23.25], [16.53, -23.47], [16.75, -24.0], [16.53, -24.53], [16.0, -24.75], [15.47, -24.53], [15.25, -24.0], [15.47, -23.47], [16.0, -23.25]]]]}, "2021-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, -23.25], [16.53, -23.47], [16.75, -24.0], [16.53, -24.53], [16.0, -24.75], [15.47, -24.53], [15.25, -24.0], [15.47, -23.47], [16.0, -23.25]]]]}, "2021-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.46, -25.5], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.35, -24.25], [15.25, -24.0], [15.35, -23.75], [15.25, -23.5], [15.46, -23.0], [15.25, -22.5], [15.47, -21.97], [16.0, -21.75], [16.53, -21.97], [16.75, -22.5], [16.54, -23.0], [16.75, -23.5], [16.65, -23.75], [16.75, -24.0], [16.65, -24.25], [16.75, -24.5], [16.65, -24.75], [16.75, -25.0], [16.63, -25.3], [17.03, -25.47], [17.25, -26.0], [17.03, -26.53], [16.68, -26.68], [16.53, -27.03], [16.0, -27.25], [15.47, -27.03], [15.25, -26.5], [15.35, -26.25], [15.25, -26.0], [15.46, -25.5]]]]}, "2021-12-26T11:30:00.000000000": 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maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.14865420955431, 21.64028436487706, 19.51694951342307, 18.010952610232437, 16.564132161367695, 18.065608172380678]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.664382221155222, -3.176763029098538, -3.5366117304100726, -4.242977157549358, -5.656877052653894, -3.843011951202155]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.664382221155222, -3.176763029098538, -4.1781327274698015, -5.52208463056769, -6.657574969617258, -4.51446399595909]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6108484864227837, -1.4077293925642054, -1.4556502474481503, -1.7597241392955505, -2.357763883468522, -1.5832852284454808]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6108484864227837, -1.4077293925642054, -1.59540432928208, -2.1115312021858617, -2.663725991323237, -1.7502450268580154]}}