{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:08.988323", "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-Aug-19_to_2011-Aug-21_353.5_16.0"}, "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": 2011080001063}, "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": "August 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 21 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 62495.54871656266}, "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": ["Mali", "Mauritania"]}, "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": []}, "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": 16.0}, "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": 353.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.15, 15.75], [-8.25, 16.0], [-8.15, 16.25], [-8.25, 16.5], [-8.03, 17.03], [-7.5, 17.25], [-7.25, 17.15], [-7.18, 17.18], [-7.03, 17.53], [-6.5, 17.75], [-5.97, 17.53], [-5.82, 17.18], [-5.47, 17.03], [-5.32, 16.68], [-5.25, 16.65], [-5.0, 16.75], [-4.47, 16.53], [-4.25, 16.0], [-4.47, 15.47], [-5.0, 15.25], [-5.25, 15.35], [-5.32, 15.32], [-5.47, 14.97], [-5.82, 14.82], [-5.85, 14.75], [-5.75, 14.5], [-5.85, 14.25], [-5.75, 14.0], [-5.97, 13.47], [-6.5, 13.25], [-7.03, 13.47], [-7.18, 13.82], [-7.53, 13.97], [-7.68, 14.32], [-8.03, 14.47], [-8.25, 15.0], [-8.15, 15.25], [-8.25, 15.5], [-8.15, 15.75]]]]}, "2011-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.15, 15.75], [-8.25, 16.0], [-8.15, 16.25], [-8.25, 16.5], [-8.03, 17.03], [-7.5, 17.25], [-7.25, 17.15], [-7.18, 17.18], [-7.03, 17.53], [-6.5, 17.75], [-5.97, 17.53], [-5.82, 17.18], [-5.47, 17.03], [-5.32, 16.68], [-5.25, 16.65], [-5.0, 16.75], [-4.47, 16.53], [-4.25, 16.0], [-4.47, 15.47], [-5.0, 15.25], [-5.25, 15.35], [-5.32, 15.32], [-5.47, 14.97], [-5.82, 14.82], [-5.85, 14.75], [-5.75, 14.5], [-5.85, 14.25], [-5.75, 14.0], [-5.97, 13.47], [-6.5, 13.25], [-7.03, 13.47], [-7.18, 13.82], [-7.53, 13.97], [-7.68, 14.32], [-8.03, 14.47], [-8.25, 15.0], [-8.15, 15.25], [-8.25, 15.5], [-8.15, 15.75]]]]}, "2011-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.15, 15.75], [-8.25, 16.0], [-8.15, 16.25], [-8.25, 16.5], [-8.03, 17.03], [-7.5, 17.25], [-7.25, 17.15], [-7.18, 17.18], [-7.03, 17.53], [-6.5, 17.75], [-5.97, 17.53], [-5.82, 17.18], [-5.47, 17.03], [-5.32, 16.68], [-5.25, 16.65], [-5.0, 16.75], [-4.47, 16.53], [-4.25, 16.0], [-4.47, 15.47], [-5.0, 15.25], [-5.25, 15.35], [-5.32, 15.32], [-5.47, 14.97], [-5.82, 14.82], [-5.85, 14.75], [-5.75, 14.5], [-5.85, 14.25], [-5.75, 14.0], [-5.97, 13.47], [-6.5, 13.25], [-7.03, 13.47], [-7.18, 13.82], [-7.53, 13.97], [-7.68, 14.32], [-8.03, 14.47], [-8.25, 15.0], [-8.15, 15.25], [-8.25, 15.5], [-8.15, 15.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.6561373717727292}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.655930446831943}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.364271099878692, 26.398211179183363, 26.289233561709523]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.734867588379473, 25.516968399811674, 24.916150832017024]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6738787335691487, -2.649334448134065, -2.6445781587926156]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2737094198809586, -3.6561373717727292, -3.1272465463674735]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8183632184698204, -1.7417438387323316, -1.695951379897745]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2628550426644773, -2.1333591703865094, -2.1504768877986904]}}