{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:58.136491", "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": "2012-Dec-01_to_2012-Dec-06_15.5_-27.0"}, "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": 2012120000033}, "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 01 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 06 2012"}, "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": 55426.65359425016}, "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": -27.0}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.35, -25.25], [14.25, -25.0], [14.47, -24.47], [15.0, -24.25], [15.5, -24.46], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.03, -24.47], [17.25, -25.0], [17.15, -25.25], [17.25, -25.5], [17.15, -25.75], [17.25, -26.0], [17.15, -26.25], [17.25, -26.5], [17.03, -27.03], [16.5, -27.25], [16.25, -27.15], [16.18, -27.18], [16.03, -27.53], [15.5, -27.75], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.82, -26.68], [14.47, -26.53], [14.25, -26.0], [14.35, -25.75], [14.25, -25.5], [14.35, -25.25]]]]}, "2012-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.35, -25.25], [14.25, -25.0], [14.47, -24.47], [15.0, -24.25], [15.5, -24.46], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.03, -24.47], [17.25, -25.0], [17.15, -25.25], [17.25, -25.5], [17.15, -25.75], [17.25, -26.0], [17.15, -26.25], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.0, -27.54], [15.5, -27.75], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.82, -26.68], [14.47, -26.53], [14.25, -26.0], [14.35, -25.75], [14.25, -25.5], [14.35, -25.25]]]]}, "2012-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.35, -25.25], [14.25, -25.0], [14.47, -24.47], [15.0, -24.25], [15.5, -24.46], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.03, -24.47], [17.25, -25.0], [17.15, -25.25], [17.25, -25.5], [17.15, -25.75], [17.25, -26.0], [17.15, -26.25], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.0, -27.54], [15.5, -27.75], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.82, -26.68], [14.47, -26.53], [14.25, -26.0], [14.35, -25.75], [14.25, -25.5], [14.35, -25.25]]]]}, "2012-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.88, -26.7], [14.47, -26.53], [14.25, -26.0], [14.47, -25.47], [15.0, -25.25], [15.3, -25.37], [15.35, -25.25], [15.25, -25.0], [15.47, -24.47], [16.0, -24.25], [16.53, -24.47], [16.68, -24.82], [17.03, -24.97], [17.25, -25.5], [17.03, -26.03], [16.5, -26.25], [17.03, -26.47], [17.25, -27.0], [17.04, -27.5], [17.25, -28.0], [17.03, -28.53], [16.5, -28.75], [16.25, -28.65], [16.0, -28.75], [15.47, -28.53], [15.32, -28.18], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.75, -27.0], [14.88, -26.7]], [[16.25, -26.15], [16.0, -26.25], [15.7, -26.12], [15.63, -26.3], [16.0, -26.46], [16.5, -26.25], [16.25, -26.15]]]]}, "2012-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.88, -26.7], [14.47, -26.53], [14.25, -26.0], [14.47, -25.47], [15.0, -25.25], [15.43, -25.43], [15.25, -25.0], [15.47, -24.47], [16.0, -24.25], [16.53, -24.47], [16.75, -25.0], [16.53, -25.53], [16.0, -25.75], [15.57, -25.57], [15.75, -26.0], [15.63, -26.3], [16.03, -26.47], [16.18, -26.82], [16.53, -26.97], [16.68, -27.32], [17.03, -27.47], [17.25, -28.0], [17.03, -28.53], [16.5, -28.75], [16.25, -28.65], [16.0, -28.75], [15.47, -28.53], [15.32, -28.18], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.75, -27.0], [14.88, -26.7]]]]}, "2012-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.97, -26.47], [15.5, -26.25], [16.03, -26.47], [16.18, -26.82], [16.53, -26.97], [16.68, -27.32], [17.03, -27.47], [17.25, -28.0], [17.03, -28.53], [16.5, -28.75], [16.25, -28.65], [16.0, -28.75], [15.47, -28.53], [15.32, -28.18], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.75, -27.0], [14.97, -26.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.322502083935547}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8672087711244894}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.697751594357044, 18.191374964036584, 19.119469144471054, 17.849047677061492, 16.91288723433115, 16.735830631387728]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.4465748446691, 16.864238182379438, 17.793589753695016, 14.77012352476504, 14.882869573780567, 15.949765736491372]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.150652705175063, -4.601286692976039, -3.6701200075483165, -3.379066731935933, -3.489085167840894, -2.8041687854657082]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.293281682805343, -6.322502083935547, -4.7779202804889, -4.66962860687579, -4.545527518746383, -3.5755974814446745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5122339514313485, -1.7054893533079096, -1.3965744698025748, -1.4645142452724795, -1.5937799935308365, -1.2974872664257637]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7617761731881056, -2.0866558280038494, -1.6243276435574119, -1.8988051666404608, -1.8908442573651363, -1.4200477946684942]}}