{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:17.911836", "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": "2020-Jun-16_to_2020-Jun-19_12.5_24.0"}, "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": 2020060000509}, "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": "June 16 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 19 2020"}, "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": 115010.59975258996}, "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": ["Algeria", "Libya"]}, "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": 24.0}, "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": 12.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.75}, "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": 26.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.25, 25.0], [9.47, 25.53], [10.0, 25.75], [10.25, 25.65], [10.32, 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26.75], [13.25, 26.65], [13.5, 26.75], [14.03, 26.53], [14.18, 26.18], [14.53, 26.03], [14.68, 25.68], [15.03, 25.53], [15.25, 25.0], [15.15, 24.75], [15.25, 24.5], [15.03, 23.97], [14.68, 23.82], [14.53, 23.47], [14.0, 23.25], [13.75, 23.35], [13.5, 23.25], [13.25, 23.35], [13.0, 23.25], [12.75, 23.35], [12.5, 23.25], [12.25, 23.35], [12.18, 23.32], [12.03, 22.97], [11.5, 22.75], [11.25, 22.85], [11.0, 22.75], [10.47, 22.97], [10.32, 23.32], [9.97, 23.47], [9.75, 24.0], [9.85, 24.25], [9.82, 24.32], [9.47, 24.47], [9.25, 25.0]]]]}, "2020-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.25, 25.0], [9.47, 25.53], [10.0, 25.75], [10.25, 25.65], [10.32, 25.68], [10.47, 26.03], [10.82, 26.18], [10.97, 26.53], [11.5, 26.75], [11.75, 26.65], [12.0, 26.75], [12.25, 26.65], [12.5, 26.75], [12.75, 26.65], [13.0, 26.75], [13.25, 26.65], [13.5, 26.75], [14.03, 26.53], [14.18, 26.18], [14.53, 26.03], [14.68, 25.68], [15.03, 25.53], [15.25, 25.0], [15.15, 24.75], [15.25, 24.5], [15.03, 23.97], [14.68, 23.82], [14.53, 23.47], [14.0, 23.25], [13.75, 23.35], [13.5, 23.25], [13.25, 23.35], [13.0, 23.25], [12.75, 23.35], [12.5, 23.25], [12.25, 23.35], [12.18, 23.32], [12.03, 22.97], [11.5, 22.75], [11.25, 22.85], [11.0, 22.75], [10.47, 22.97], [10.32, 23.32], [9.97, 23.47], [9.75, 24.0], [9.85, 24.25], [9.82, 24.32], [9.47, 24.47], [9.25, 25.0]]]]}, "2020-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.47, 25.53], [12.0, 25.75], [12.53, 25.53], [12.68, 25.18], [13.03, 25.03], [13.25, 24.5], [13.15, 24.25], [13.25, 24.0], [13.03, 23.47], [12.5, 23.25], [12.25, 23.35], [12.0, 23.25], [11.75, 23.35], [11.5, 23.25], [10.97, 23.47], [10.75, 24.0], [10.97, 24.53], [11.38, 24.7], [11.25, 25.0], [11.47, 25.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.060016317542988}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.953405103329146}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.44120365107335, 26.906188593432375, 27.94266436782766, 26.795627975283423]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.660000649212805, 24.76103566237714, 25.602695465099544, 25.739501503229008]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.009329758715746, -4.506591967766571, -3.42585995682364, -3.284560842117287]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.0371892323236125, -5.060016317542988, -4.1854105611527075, -3.492036595814625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7490290812934184, -1.9952676784629528, -1.5281255043996975, -1.4154258426169286]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.120103422274887, -2.2396592582149735, -1.7039404852579225, -1.4970515098553432]}}