{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:41.508995", "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": "2017-Aug-25_to_2017-Aug-29_14.0_-22.5"}, "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": 2017080000746}, "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 25 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 29 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 63427.28841250432}, "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": ["South 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": -22.5}, "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": 14.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, -21.5], [12.97, -20.97], [13.5, -20.75], [14.03, -20.97], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.75, -22.5], [14.53, -23.03], [14.0, -23.25], [13.47, -23.03], [13.25, -22.5], [13.35, -22.25], [13.32, -22.18], [12.97, -22.03], [12.75, -21.5]]]]}, "2017-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, -21.5], [12.97, -20.97], [13.5, -20.75], [14.03, -20.97], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.75, -22.5], [14.53, -23.03], [14.0, -23.25], [13.47, -23.03], [13.25, -22.5], [13.35, -22.25], [13.32, -22.18], [12.97, -22.03], [12.75, -21.5]]]]}, "2017-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -20.25], [11.25, -20.0], [11.35, -19.75], [11.25, -19.5], [11.35, -19.25], [11.25, -19.0], [11.47, -18.47], [12.0, -18.25], [12.53, -18.47], [12.68, -18.82], [13.03, -18.97], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.68, -21.82], [15.03, -21.97], [15.25, -22.5], [15.03, -23.03], [14.68, -23.18], [14.53, -23.53], [14.0, -23.75], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.82, -22.68], [12.47, -22.53], [12.32, -22.18], [11.97, -22.03], [11.82, -21.68], [11.47, -21.53], [11.25, -21.0], [11.35, -20.75], [11.25, -20.5], [11.35, -20.25]]]]}, "2017-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -20.25], [11.25, -20.0], [11.35, -19.75], [11.25, -19.5], [11.35, -19.25], [11.25, -19.0], [11.47, -18.47], [12.0, -18.25], [12.53, -18.47], [12.68, -18.82], [13.03, -18.97], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.68, -21.82], [15.03, -21.97], [15.25, -22.5], [15.03, -23.03], [14.68, -23.18], [14.53, -23.53], [14.0, -23.75], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.82, -22.68], [12.47, -22.53], [12.32, -22.18], [11.97, -22.03], [11.82, -21.68], [11.47, -21.53], [11.25, -21.0], [11.35, -20.75], [11.25, -20.5], [11.35, -20.25]]]]}, "2017-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, -20.25], [11.25, -20.0], [11.35, -19.75], [11.25, -19.5], [11.35, -19.25], [11.25, -19.0], [11.47, -18.47], [12.0, -18.25], [12.53, -18.47], [12.68, -18.82], [13.03, -18.97], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.68, -21.82], [15.03, -21.97], [15.25, -22.5], [15.03, -23.03], [14.68, -23.18], [14.53, -23.53], [14.0, -23.75], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.82, -22.68], [12.47, -22.53], [12.32, -22.18], [11.97, -22.03], [11.82, -21.68], [11.47, -21.53], [11.25, -21.0], [11.35, -20.75], [11.25, -20.5], [11.35, -20.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.788630718651916}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5930631872387053}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.975143804689822, 12.10582084942746, 12.73175632137503, 12.554891658091378, 12.815742973340718]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.652534850493964, 11.6671386593016, 11.012482363365734, 11.281679239052323, 11.67014055333425]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.679440343667295, -1.5538475650693233, -1.6106755663640073, -1.7376713274718518, -1.424411549572183]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8456305830682709, -1.8557333768885655, -2.788630718651916, -2.719523482783643, -2.750981141536556]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2256061271252205, -1.0668742347214453, -1.35731029843596, -1.5972463898826752, -1.4056085712457733]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2967237121062427, -1.1673879286758622, -1.8439656314119355, -1.8177774928138597, -1.7416794303313816]}}