{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:01:52.414581", "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-12_to_2014-Dec-15_345.0_11.5"}, "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": 2014120000598}, "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 12 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 15 2014"}, "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": 141540.3358803296}, "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": ["Gambia", "Guinea", "Guinea-Bissau", "Mali", "Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "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": 11.5}, "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": 345.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.75}, "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": 15.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.53, 14.03], [-16.0, 14.25], [-15.57, 14.07], [-15.75, 14.5], [-15.53, 15.03], [-15.18, 15.18], [-15.03, 15.53], [-14.5, 15.75], [-14.2, 15.62], [-14.03, 16.03], [-13.5, 16.25], [-12.97, 16.03], [-12.82, 15.68], [-12.47, 15.53], [-12.32, 15.18], [-12.25, 15.15], [-12.0, 15.25], [-11.75, 15.15], [-11.5, 15.25], [-10.97, 15.03], [-10.75, 14.5], [-10.97, 13.97], [-11.32, 13.82], [-11.47, 13.47], [-11.82, 13.32], [-11.96, 13.0], [-11.75, 12.5], [-11.97, 11.97], [-12.32, 11.82], [-12.47, 11.47], [-12.82, 11.32], [-12.97, 10.97], [-13.32, 10.82], [-13.35, 10.75], [-13.25, 10.5], [-13.47, 9.97], [-14.0, 9.75], [-14.25, 9.85], [-14.5, 9.75], [-15.03, 9.97], [-15.18, 10.32], [-15.5, 10.46], [-16.0, 10.25], [-16.53, 10.47], [-16.75, 11.0], [-16.54, 11.5], [-16.75, 12.0], [-16.54, 12.5], [-16.75, 13.0], [-16.65, 13.25], [-16.75, 13.5], [-16.53, 14.03]], [[-14.93, 13.43], [-14.82, 13.18], [-14.75, 13.15], [-14.5, 13.25], [-14.93, 13.43]], [[-14.25, 13.15], [-14.12, 13.2], [-14.18, 13.32], [-14.25, 13.35], [-14.5, 13.25], [-14.25, 13.15]], [[-15.32, 13.68], [-15.07, 13.57], [-15.18, 13.82], [-15.43, 13.93], [-15.32, 13.68]]]]}, "2014-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.53, 14.03], [-16.0, 14.25], [-15.57, 14.07], [-15.75, 14.5], [-15.53, 15.03], [-15.18, 15.18], [-15.03, 15.53], [-14.5, 15.75], [-14.2, 15.62], [-14.03, 16.03], [-13.5, 16.25], [-12.97, 16.03], [-12.82, 15.68], [-12.47, 15.53], [-12.32, 15.18], [-12.25, 15.15], [-12.0, 15.25], [-11.75, 15.15], [-11.5, 15.25], [-10.97, 15.03], [-10.75, 14.5], [-10.97, 13.97], [-11.32, 13.82], [-11.47, 13.47], [-11.82, 13.32], [-11.96, 13.0], [-11.75, 12.5], [-11.97, 11.97], [-12.32, 11.82], [-12.47, 11.47], [-12.82, 11.32], [-12.97, 10.97], [-13.32, 10.82], [-13.35, 10.75], [-13.25, 10.5], [-13.47, 9.97], [-14.0, 9.75], [-14.25, 9.85], [-14.5, 9.75], [-15.03, 9.97], [-15.18, 10.32], [-15.5, 10.46], [-16.0, 10.25], [-16.53, 10.47], [-16.75, 11.0], [-16.54, 11.5], [-16.75, 12.0], [-16.54, 12.5], [-16.75, 13.0], [-16.65, 13.25], [-16.75, 13.5], [-16.53, 14.03]], [[-14.93, 13.43], [-14.82, 13.18], [-14.75, 13.15], [-14.5, 13.25], [-14.93, 13.43]], [[-14.25, 13.15], [-14.12, 13.2], [-14.18, 13.32], [-14.25, 13.35], [-14.5, 13.25], [-14.25, 13.15]], [[-15.32, 13.68], [-15.07, 13.57], [-15.18, 13.82], [-15.43, 13.93], [-15.32, 13.68]]]]}, "2014-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.53, 14.03], [-16.0, 14.25], [-15.57, 14.07], [-15.75, 14.5], [-15.53, 15.03], [-15.18, 15.18], [-15.03, 15.53], [-14.5, 15.75], [-14.2, 15.62], [-14.03, 16.03], [-13.5, 16.25], [-12.97, 16.03], [-12.82, 15.68], [-12.47, 15.53], [-12.32, 15.18], [-12.25, 15.15], [-12.0, 15.25], [-11.75, 15.15], [-11.5, 15.25], [-10.97, 15.03], [-10.75, 14.5], [-10.97, 13.97], [-11.32, 13.82], [-11.47, 13.47], [-11.82, 13.32], [-11.96, 13.0], [-11.75, 12.5], [-11.97, 11.97], [-12.32, 11.82], [-12.47, 11.47], [-12.82, 11.32], [-12.97, 10.97], [-13.32, 10.82], [-13.35, 10.75], [-13.25, 10.5], [-13.47, 9.97], [-14.0, 9.75], [-14.25, 9.85], [-14.5, 9.75], [-15.03, 9.97], [-15.18, 10.32], [-15.5, 10.46], [-16.0, 10.25], [-16.53, 10.47], [-16.75, 11.0], [-16.54, 11.5], [-16.75, 12.0], [-16.54, 12.5], [-16.75, 13.0], [-16.65, 13.25], [-16.75, 13.5], [-16.53, 14.03]], [[-14.93, 13.43], [-14.82, 13.18], [-14.75, 13.15], [-14.5, 13.25], [-14.93, 13.43]], [[-14.25, 13.15], [-14.12, 13.2], [-14.18, 13.32], [-14.25, 13.35], [-14.5, 13.25], [-14.25, 13.15]], [[-15.32, 13.68], [-15.07, 13.57], [-15.18, 13.82], [-15.43, 13.93], [-15.32, 13.68]]]]}, "2014-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.0, 15.25], [-14.47, 15.03], [-14.25, 14.5], [-14.47, 13.97], [-15.0, 13.75], [-15.53, 13.97], [-15.75, 14.5], [-15.53, 15.03], [-15.0, 15.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8322978195974997}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4586868740056183}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.483050162594793, 23.38410285728156, 24.027363162744052, 22.93230071234956]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.0620411789493, 22.076440305408482, 22.690605786028925, 22.93230071234956]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6329417786561082, -2.6990478879259916, -2.0509191324350367, -2.1368225549923636]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8322978195974997, -3.7686829025473685, -2.842788583770812, -2.1368225549923636]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.076243083526304, -2.152027023295669, -1.6194396122573127, -1.3167702782352466]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.713164314934352, -2.828856769124151, -2.243264144603756, -1.3167702782352466]}}