{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:46.705508", "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": "2011-Nov-01_to_2011-Nov-04_16.0_15.5"}, "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": 2011110000113}, "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 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 04 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 101139.36175111146}, "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": ["Chad", "Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 15.5}, "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": 13.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, 14.47], [13.25, 15.0], [13.47, 15.53], [14.0, 15.75], [14.25, 15.65], [14.32, 15.68], [14.47, 16.03], [15.0, 16.25], [15.25, 16.15], [15.32, 16.18], [15.47, 16.53], [16.0, 16.75], [16.53, 16.53], [16.68, 16.18], [17.03, 16.03], [17.25, 15.5], [17.03, 14.97], [16.68, 14.82], [16.53, 14.47], [16.0, 14.25], [15.75, 14.35], [15.5, 14.25], [15.25, 14.35], [15.0, 14.25], [14.75, 14.35], [14.5, 14.25], [14.25, 14.35], [14.0, 14.25], [13.47, 14.47]]]]}, "2011-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 16.0], [13.97, 16.53], [14.5, 16.75], [14.75, 16.65], [15.0, 16.75], [15.25, 16.65], [15.5, 16.75], [15.75, 16.65], [15.82, 16.68], [15.97, 17.03], [16.5, 17.25], [16.75, 17.15], [17.0, 17.25], [17.25, 17.15], [17.5, 17.25], [17.75, 17.15], [18.0, 17.25], [18.25, 17.15], [18.5, 17.25], [18.75, 17.15], [19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [20.03, 17.03], [20.25, 16.5], [20.15, 16.25], [20.25, 16.0], [20.03, 15.47], [19.5, 15.25], [19.25, 15.35], [19.18, 15.32], [19.03, 14.97], [18.5, 14.75], [18.25, 14.85], [18.0, 14.75], [17.75, 14.85], [17.68, 14.82], [17.53, 14.47], [17.0, 14.25], [16.75, 14.35], [16.5, 14.25], [16.25, 14.35], [16.0, 14.25], [15.75, 14.35], [15.5, 14.25], [15.25, 14.35], [15.0, 14.25], [14.75, 14.35], [14.5, 14.25], [14.25, 14.35], [14.0, 14.25], [13.47, 14.47], [13.25, 15.0], [13.47, 15.53], [13.82, 15.68], [13.85, 15.75], [13.75, 16.0]]]]}, "2011-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 16.0], [13.97, 16.53], [14.5, 16.75], [14.75, 16.65], [15.0, 16.75], [15.25, 16.65], [15.5, 16.75], [15.75, 16.65], [15.82, 16.68], [15.97, 17.03], [16.5, 17.25], [16.75, 17.15], [17.0, 17.25], [17.25, 17.15], [17.5, 17.25], [17.75, 17.15], [18.0, 17.25], [18.25, 17.15], [18.5, 17.25], [18.75, 17.15], [19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [20.03, 17.03], [20.25, 16.5], [20.15, 16.25], [20.25, 16.0], [20.03, 15.47], [19.5, 15.25], [19.25, 15.35], [19.18, 15.32], [19.03, 14.97], [18.5, 14.75], [18.25, 14.85], [18.0, 14.75], [17.75, 14.85], 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evolution of mean t2m anomalies.", "value": [-2.1373509867658016, -2.277821855165872, -2.8970769710600015, -2.705823648986753]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.198453417432404, -2.6123554082481633, -3.5144540062890997, -3.2362568501679903]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3019094313284392, -1.3581135411459466, -1.7328776785495528, -1.5762019968840026]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3428065844914434, -1.5323954728472844, -1.9649873219531846, -1.7927641392135327]}}