{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:12.225036", "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-Apr-23_to_2011-Apr-25_351.0_21.0"}, "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": 2011040001206}, "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": "April 23 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 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": 57556.55957582749}, "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": ["Mauritania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 21.0}, "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": 351.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 353.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 22.03], [-10.5, 22.25], [-10.25, 22.15], [-10.0, 22.25], [-9.75, 22.15], [-9.68, 22.18], [-9.53, 22.53], [-9.0, 22.75], [-8.75, 22.65], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.68, 22.68], [-7.53, 23.03], [-7.0, 23.25], [-6.47, 23.03], [-6.25, 22.5], [-6.35, 22.25], [-6.25, 22.0], [-6.47, 21.47], [-7.0, 21.25], [-7.25, 21.35], [-7.32, 21.32], [-7.47, 20.97], [-7.82, 20.82], [-7.97, 20.47], [-8.32, 20.32], [-8.47, 19.97], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.53, 19.97], [-10.68, 20.32], [-11.03, 20.47], [-11.25, 21.0], [-11.15, 21.25], [-11.25, 21.5], [-11.03, 22.03]]]]}, "2011-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 22.03], [-10.5, 22.25], [-10.25, 22.15], [-10.0, 22.25], [-9.75, 22.15], [-9.68, 22.18], [-9.53, 22.53], [-9.0, 22.75], [-8.75, 22.65], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.68, 22.68], [-7.53, 23.03], [-7.0, 23.25], [-6.47, 23.03], [-6.25, 22.5], [-6.35, 22.25], [-6.25, 22.0], [-6.47, 21.47], [-7.0, 21.25], [-7.25, 21.35], [-7.32, 21.32], [-7.47, 20.97], [-7.82, 20.82], [-7.97, 20.47], [-8.32, 20.32], [-8.47, 19.97], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.53, 19.97], [-10.68, 20.32], [-11.03, 20.47], [-11.25, 21.0], [-11.15, 21.25], [-11.25, 21.5], [-11.03, 22.03]]]]}, "2011-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 22.03], [-10.5, 22.25], [-10.25, 22.15], [-10.0, 22.25], [-9.75, 22.15], [-9.68, 22.18], [-9.53, 22.53], [-9.0, 22.75], [-8.75, 22.65], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.68, 22.68], [-7.53, 23.03], [-7.0, 23.25], [-6.47, 23.03], [-6.25, 22.5], [-6.35, 22.25], [-6.25, 22.0], [-6.47, 21.47], [-7.0, 21.25], [-7.25, 21.35], [-7.32, 21.32], [-7.47, 20.97], [-7.82, 20.82], [-7.97, 20.47], [-8.32, 20.32], [-8.47, 19.97], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.53, 19.97], [-10.68, 20.32], [-11.03, 20.47], [-11.25, 21.0], [-11.15, 21.25], [-11.25, 21.5], [-11.03, 22.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.240393512479898}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.238826955409821}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.153882101066642, 21.15180558152406, 22.50826570409299]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.347679444420464, 20.53649617110449, 21.742101734770984]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.808845431745939, -6.013816479492286, -4.893818954991238]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.099148293961662, -6.240393512479898, -5.2899529445114695]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5092299525714132, -1.920932312088332, -1.5870080567341636]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5730969753935669, -2.0203649351476622, -1.6975614514433353]}}