{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.934748", "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-Dec-31_to_2012-Jan-03_344.5_12.0"}, "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": 2011120001564}, "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 31 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2012"}, "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": 78619.29491046073}, "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", "Guinea-Bissau"]}, "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": 12.0}, "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": 344.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "344.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 340.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 345.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.53, 12.03], [-19.0, 12.25], [-18.75, 12.15], [-18.68, 12.18], [-18.65, 12.25], [-18.75, 12.5], [-18.53, 13.03], [-18.18, 13.18], [-18.15, 13.25], [-18.25, 13.5], [-18.03, 14.03], [-17.68, 14.18], [-17.53, 14.53], [-17.0, 14.75], [-16.47, 14.53], [-16.25, 14.0], [-16.35, 13.75], [-16.25, 13.5], [-16.35, 13.25], [-16.25, 13.0], [-16.35, 12.75], [-16.32, 12.68], [-16.0, 12.54], [-15.5, 12.75], [-14.97, 12.53], [-14.75, 12.0], [-14.85, 11.75], [-14.8, 11.62], [-14.5, 11.75], [-13.97, 11.53], [-13.75, 11.0], [-13.97, 10.47], [-14.5, 10.25], [-15.03, 10.47], [-15.2, 10.88], [-15.5, 10.75], [-15.75, 10.85], [-16.0, 10.75], [-16.25, 10.85], [-16.5, 10.75], [-17.0, 10.96], [-17.32, 10.82], [-17.47, 10.47], [-17.82, 10.32], [-17.97, 9.97], [-18.5, 9.75], [-19.03, 9.97], [-19.18, 10.32], [-19.53, 10.47], [-19.75, 11.0], [-19.65, 11.25], [-19.75, 11.5], [-19.53, 12.03]]]]}, "2012-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.53, 12.03], [-19.0, 12.25], [-18.75, 12.15], [-18.68, 12.18], [-18.65, 12.25], [-18.75, 12.5], 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13.03], [-18.18, 13.18], [-18.15, 13.25], [-18.25, 13.5], [-18.03, 14.03], [-17.68, 14.18], [-17.53, 14.53], [-17.0, 14.75], [-16.47, 14.53], [-16.25, 14.0], [-16.35, 13.75], [-16.25, 13.5], [-16.35, 13.25], [-16.25, 13.0], [-16.35, 12.75], [-16.32, 12.68], [-16.0, 12.54], [-15.5, 12.75], [-14.97, 12.53], [-14.75, 12.0], [-14.85, 11.75], [-14.82, 11.68], [-14.75, 11.65], [-14.5, 11.75], [-13.97, 11.53], [-13.75, 11.0], [-13.97, 10.47], [-14.5, 10.25], [-14.75, 10.35], [-15.0, 10.25], [-15.53, 10.47], [-15.68, 10.82], [-15.75, 10.85], [-16.0, 10.75], [-16.25, 10.85], [-16.5, 10.75], [-17.0, 10.96], [-17.32, 10.82], [-17.47, 10.47], [-17.82, 10.32], [-17.97, 9.97], [-18.5, 9.75], [-19.03, 9.97], [-19.18, 10.32], [-19.53, 10.47], [-19.75, 11.0], [-19.65, 11.25], [-19.75, 11.5], [-19.53, 12.03]]]]}, "2012-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.0, 11.75], [-14.47, 11.53], [-14.25, 11.0], [-14.47, 10.47], [-15.0, 10.25], [-15.53, 10.47], [-15.75, 11.0], [-15.53, 11.53], [-15.0, 11.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.0128151806896994}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.570779304379957}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.422658877083222, 22.761280883342124, 23.34135884133002, 24.740450591153888]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.89956539587274, 20.36585497717971, 21.221733800412323, 24.740450591153888]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3885572598194882, -1.9873977102352962, -1.3442154578332226, -1.1849118763679485]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3497292721168037, -3.0128151806896994, -1.8548759320903514, -1.1849118763679485]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5091380921754163, -2.2143223254522075, -1.5341455513362705, -1.3552758012691677]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0298848012816357, -2.7549751709867456, -1.844237730720113, -1.3552758012691677]}}