{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:01:53.622787", "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": "2014-Dec-17_to_2014-Dec-24_346.5_9.0"}, "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": 2014120000801}, "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 17 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 24 2014"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 76203.13046583202}, "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": ["Guinea"]}, "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": ["North Atlantic Ocean"]}, "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": 9.0}, "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": 346.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "346.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 346.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 10.75], [-13.97, 10.53], [-13.75, 10.0], [-13.97, 9.47], [-14.5, 9.25], [-15.03, 9.47], [-15.25, 10.0], [-15.03, 10.53], [-14.5, 10.75]]]]}, "2014-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 10.0], [-15.03, 10.53], [-14.5, 10.75], [-13.97, 10.53], [-13.82, 10.18], [-13.75, 10.15], [-13.5, 10.25], [-12.97, 10.03], [-12.75, 9.5], [-12.85, 9.25], [-12.75, 9.0], [-12.97, 8.47], [-13.5, 8.25], [-14.03, 8.47], [-14.18, 8.82], [-14.53, 8.97], [-14.68, 9.32], [-15.03, 9.47], [-15.25, 10.0]]]]}, "2014-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 9.97], [-16.25, 10.5], [-16.03, 11.03], [-15.5, 11.25], [-14.97, 11.03], [-14.8, 10.62], [-14.5, 10.75], [-13.97, 10.53], [-13.82, 10.18], [-13.75, 10.15], [-13.5, 10.25], [-12.97, 10.03], [-12.75, 9.5], [-12.85, 9.25], [-12.75, 9.0], [-12.85, 8.75], [-12.75, 8.5], [-12.97, 7.97], [-13.5, 7.75], [-14.03, 7.97], [-14.25, 8.5], [-14.15, 8.75], [-14.18, 8.82], [-14.25, 8.85], [-14.5, 8.75], [-15.03, 8.97], [-15.25, 9.5], [-15.15, 9.75], [-15.2, 9.88], [-15.5, 9.75], [-16.03, 9.97]]]]}, "2014-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.75, 10.5], [-16.53, 11.03], [-16.18, 11.18], [-16.03, 11.53], [-15.5, 11.75], [-14.97, 11.53], [-14.82, 11.18], [-14.47, 11.03], [-14.32, 10.68], [-14.25, 10.65], [-14.0, 10.75], [-13.47, 10.53], [-13.32, 10.18], [-12.97, 10.03], [-12.75, 9.5], [-12.85, 9.25], [-12.75, 9.0], [-12.85, 8.75], [-12.75, 8.5], [-12.97, 7.97], [-13.5, 7.75], [-14.03, 7.97], [-14.25, 8.5], [-14.15, 8.75], [-14.18, 8.82], [-14.25, 8.85], [-14.5, 8.75], [-14.75, 8.85], [-15.0, 8.75], [-15.53, 8.97], [-15.68, 9.32], [-16.03, 9.47], [-16.18, 9.82], [-16.53, 9.97], [-16.75, 10.5]]]]}, "2014-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 9.5], [-17.03, 10.03], [-16.68, 10.18], [-16.65, 10.25], [-16.75, 10.5], [-16.53, 11.03], [-16.18, 11.18], [-16.03, 11.53], [-15.5, 11.75], [-14.97, 11.53], [-14.82, 11.18], [-14.47, 11.03], [-14.32, 10.68], [-14.25, 10.65], [-14.0, 10.75], [-13.47, 10.53], [-13.32, 10.18], [-12.97, 10.03], [-12.75, 9.5], [-12.85, 9.25], [-12.75, 9.0], [-12.85, 8.75], [-12.75, 8.5], [-12.97, 7.97], [-13.5, 7.75], [-13.75, 7.85], [-14.0, 7.75], [-14.25, 7.85], [-14.5, 7.75], [-15.03, 7.97], [-15.18, 8.32], [-15.25, 8.35], [-15.5, 8.25], [-15.75, 8.35], [-16.0, 8.25], [-16.53, 8.47], [-16.68, 8.82], [-17.03, 8.97], [-17.25, 9.5]]]]}, "2014-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 9.5], [-17.03, 10.03], [-16.68, 10.18], [-16.65, 10.25], [-16.75, 10.5], [-16.53, 11.03], [-16.18, 11.18], [-16.03, 11.53], [-15.5, 11.75], [-14.97, 11.53], [-14.82, 11.18], [-14.47, 11.03], [-14.32, 10.68], [-14.25, 10.65], [-14.0, 10.75], [-13.47, 10.53], [-13.32, 10.18], [-12.97, 10.03], [-12.75, 9.5], [-12.85, 9.25], [-12.75, 9.0], [-12.85, 8.75], [-12.75, 8.5], [-12.97, 7.97], [-13.5, 7.75], [-13.75, 7.85], [-14.0, 7.75], [-14.25, 7.85], [-14.5, 7.75], [-15.03, 7.97], [-15.18, 8.32], [-15.25, 8.35], 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9.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.1963793411144366}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.7924053770532004}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.663120952885265, 26.60442314399711, 26.565229435626065, 26.333946402116965, 26.37872571292229, 26.315856102327075, 26.491975171271406, 26.716772492568964]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.663120952885265, 26.22417771890366, 26.150604100146154, 25.784511241127348, 25.623688120947747, 25.700220464320182, 25.74907229518425, 26.716772492568964]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7160832250140743, 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