{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:56.782112", "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": "2021-Aug-19_to_2021-Aug-22_15.5_-20.5"}, "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": 2021080000785}, "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 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 22 2021"}, "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": 55163.95441657671}, "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": ["Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -20.5}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, -18.47], [12.82, -18.32], [12.97, -17.97], [13.5, -17.75], [14.03, -17.97], [14.25, -18.5], [14.13, -18.8], [14.25, -18.85], [14.5, -18.75], [15.03, -18.97], [15.18, -19.32], [15.53, -19.47], [15.68, -19.82], [16.03, -19.97], [16.25, -20.5], [16.15, -20.75], [16.18, -20.82], [16.53, -20.97], [16.75, -21.5], [16.53, -22.03], [16.0, -22.25], [15.75, -22.15], [15.5, -22.25], [14.97, -22.03], [14.82, -21.68], [14.47, -21.53], [14.32, -21.18], [14.25, -21.15], [14.0, -21.25], [13.75, -21.15], [13.5, -21.25], [12.97, -21.03], [12.75, -20.5], [12.88, -20.2], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.25, -19.0], [12.47, -18.47]]]]}, "2021-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -18.75], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.25, -17.85], [13.5, -17.75], [14.03, -17.97], [14.25, -18.5], [14.13, -18.8], [14.25, -18.85], [14.5, -18.75], [15.03, -18.97], [15.18, -19.32], [15.53, -19.47], [15.68, -19.82], [16.03, -19.97], [16.25, -20.5], [16.15, -20.75], [16.18, -20.82], [16.53, -20.97], [16.75, -21.5], [16.53, -22.03], [16.0, -22.25], [15.75, -22.15], [15.5, -22.25], [14.97, -22.03], [14.82, -21.68], [14.47, -21.53], [14.32, -21.18], [14.25, -21.15], [14.0, -21.25], [13.75, -21.15], [13.5, -21.25], [12.97, -21.03], [12.75, -20.5], [12.85, -20.25], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.25, -19.0], [12.35, -18.75]]]]}, "2021-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -18.75], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.25, -17.85], [13.5, -17.75], [14.03, -17.97], [14.25, -18.5], [14.13, -18.8], [14.25, -18.85], [14.5, -18.75], [15.03, -18.97], [15.18, -19.32], [15.53, -19.47], [15.68, -19.82], [16.03, -19.97], [16.25, -20.5], [16.15, -20.75], [16.18, -20.82], [16.53, -20.97], [16.75, -21.5], [16.53, -22.03], [16.0, -22.25], [15.75, -22.15], [15.5, -22.25], [14.97, -22.03], [14.82, -21.68], [14.47, -21.53], [14.32, -21.18], [14.25, -21.15], [14.0, -21.25], [13.75, -21.15], [13.5, -21.25], [12.97, -21.03], [12.75, -20.5], [12.85, -20.25], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.25, -19.0], [12.35, -18.75]]]]}, "2021-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -18.75], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.53, -17.97], [13.75, -18.5], [13.65, -18.75], [13.75, -19.0], [13.65, -19.25], [13.68, -19.32], [14.03, -19.47], [14.25, -20.0], [14.03, -20.53], [13.5, -20.75], [12.97, -20.53], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.25, -19.0], [12.35, -18.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.684994601204096}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.77922167075703}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.535122343688613, 14.78196792475211, 13.982239779449117, 14.463541309271761]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.833308996752692, 12.346105317090291, 11.972582496015605, 13.098671000930096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9612691591802265, -4.78331303652335, -5.663851705881014, -4.034093190729493]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.318065075685695, -5.864511444287984, -7.684994601204096, -4.661914895968209]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3843373194234692, -1.6923691390280928, -1.9907653423243998, -1.2168477537076665]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6576665129458732, -2.030937204501278, -2.403959144857582, -1.3769463303726055]}}