{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:26.944635", "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": "2013-Jan-31_to_2013-Feb-03_7.5_9.5"}, "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": 2013010000994}, "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 31 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 03 2013"}, "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": 97272.6669317651}, "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": ["Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-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": 9.5}, "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": 7.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 8.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 11.5], [3.97, 12.03], [4.5, 12.25], [4.75, 12.15], [5.0, 12.25], 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10.5], [9.15, 10.25], [9.25, 10.0], [9.15, 9.75], [9.25, 9.5], [9.15, 9.25], [9.25, 9.0], [9.03, 8.47], [8.5, 8.25], [8.25, 8.35], [8.0, 8.25], [7.75, 8.35], [7.5, 8.25], [6.97, 8.47], [6.82, 8.82], [6.75, 8.85], [6.5, 8.75], [5.97, 8.97], [5.75, 9.5], [5.85, 9.75], [5.82, 9.82], [5.75, 9.85], [5.5, 9.75], [5.25, 9.85], [5.0, 9.75], [4.47, 9.97], [4.25, 10.5], [4.35, 10.75], [4.32, 10.82], [3.97, 10.97], [3.75, 11.5]]]]}, "2013-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 11.5], [3.97, 12.03], [4.5, 12.25], [4.75, 12.15], [5.0, 12.25], [5.25, 12.15], [5.5, 12.25], [5.75, 12.15], [6.0, 12.25], [6.3, 12.13], [6.47, 12.53], [7.0, 12.75], [7.53, 12.53], [7.68, 12.18], [8.03, 12.03], [8.18, 11.68], [8.53, 11.53], [8.68, 11.18], [9.03, 11.03], [9.25, 10.5], [9.15, 10.25], [9.25, 10.0], [9.15, 9.75], [9.25, 9.5], [9.15, 9.25], [9.25, 9.0], [9.03, 8.47], [8.5, 8.25], [8.25, 8.35], [8.0, 8.25], [7.75, 8.35], [7.5, 8.25], [6.97, 8.47], [6.82, 8.82], [6.75, 8.85], 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"value": [19.174325600951192, 18.512438296441758, 19.263991186646592, 26.622733849354574]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2436104390714493, -4.010665818070423, -3.3285355461186388, -1.980529811888971]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.140150435748637, -4.8256836116794375, -3.6672848342481075, -1.980529811888971]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6474914062056936, -2.0927023202687307, -1.7587368251211841, -1.4385579432875948]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.959132608945182, -2.3607039171981126, -2.3575454145408132, -1.4385579432875948]}}