{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:22.104632", "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": "2015-Dec-12_to_2015-Dec-15_346.5_13.0"}, "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": 2015120000295}, "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 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 15 2015"}, "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": 72399.41861047182}, "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", "Senegal"]}, "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": 13.0}, "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": 345.25}, "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": 11.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.65, 12.25], [-14.75, 12.5], [-14.53, 13.03], [-14.18, 13.18], [-14.03, 13.53], [-13.68, 13.68], [-13.53, 14.03], [-13.0, 14.25], [-12.75, 14.15], [-12.5, 14.25], [-12.25, 14.15], [-12.0, 14.25], [-11.47, 14.03], [-11.32, 13.68], [-10.97, 13.53], [-10.75, 13.0], [-10.97, 12.47], [-11.32, 12.32], [-11.35, 12.25], [-11.25, 12.0], [-11.47, 11.47], [-11.82, 11.32], [-11.97, 10.97], [-12.5, 10.75], [-12.75, 10.85], [-13.0, 10.75], [-13.5, 10.96], [-14.0, 10.75], [-14.53, 10.97], [-14.75, 11.5], [-14.65, 11.75], [-14.75, 12.0], [-14.65, 12.25]]]]}, "2015-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 14.03], [-14.5, 14.25], [-13.97, 14.03], [-13.82, 13.68], [-13.75, 13.65], [-13.68, 13.68], [-13.53, 14.03], [-13.0, 14.25], [-12.75, 14.15], [-12.5, 14.25], [-12.25, 14.15], [-12.0, 14.25], [-11.47, 14.03], [-11.32, 13.68], [-10.97, 13.53], [-10.75, 13.0], [-10.97, 12.47], [-11.32, 12.32], [-11.35, 12.25], [-11.25, 12.0], [-11.47, 11.47], [-11.82, 11.32], [-11.97, 10.97], [-12.5, 10.75], [-12.75, 10.85], [-13.0, 10.75], [-13.5, 10.96], [-14.0, 10.75], [-14.53, 10.97], [-14.75, 11.5], [-14.65, 11.75], [-14.75, 12.0], [-14.65, 12.25], [-14.68, 12.32], [-15.03, 12.47], [-15.25, 13.0], [-15.15, 13.25], [-15.25, 13.5], [-15.03, 14.03]]]]}, "2015-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 14.03], [-14.5, 14.25], [-13.97, 14.03], [-13.82, 13.68], [-13.75, 13.65], [-13.68, 13.68], [-13.53, 14.03], [-13.0, 14.25], [-12.75, 14.15], [-12.5, 14.25], [-12.25, 14.15], [-12.0, 14.25], [-11.47, 14.03], [-11.32, 13.68], [-10.97, 13.53], [-10.75, 13.0], [-10.97, 12.47], [-11.32, 12.32], [-11.35, 12.25], [-11.25, 12.0], [-11.47, 11.47], [-11.82, 11.32], [-11.97, 10.97], [-12.5, 10.75], [-12.75, 10.85], [-13.0, 10.75], [-13.5, 10.96], [-14.0, 10.75], [-14.53, 10.97], [-14.75, 11.5], [-14.65, 11.75], [-14.75, 12.0], [-14.65, 12.25], [-14.68, 12.32], [-15.03, 12.47], [-15.25, 13.0], [-15.15, 13.25], [-15.25, 13.5], [-15.03, 14.03]]]]}, "2015-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 14.03], [-14.5, 14.25], [-13.97, 14.03], [-13.82, 13.68], [-13.75, 13.65], [-13.5, 13.75], [-13.25, 13.65], [-13.0, 13.75], [-12.47, 13.53], [-12.25, 13.0], [-12.47, 12.47], [-13.0, 12.25], [-13.25, 12.35], [-13.5, 12.25], [-13.75, 12.35], [-14.0, 12.25], [-14.25, 12.35], [-14.5, 12.25], [-15.03, 12.47], [-15.25, 13.0], [-15.15, 13.25], [-15.25, 13.5], [-15.03, 14.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.802088538540147}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6572926785126425}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.455371395896123, 22.926213638101558, 23.5940494729403, 24.627935177292557]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.22760124970847, 21.65912469518878, 22.428406728681523, 24.198552828194693]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5793930779245864, -3.1128942051310866, -2.4496365200383203, -1.7943332338906886]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4047889283777977, -4.802088538540147, -3.7473130810174666, -2.0440546550477166]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1711399504053936, -2.6301514327229616, -2.0336303897672665, -1.4071197934697972]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1381673040276885, -3.875584591842966, -3.0898296765952735, -1.5323517362859176]}}