{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:54.847358", "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": "2023-Apr-30_to_2023-May-02_33.0_18.5"}, "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": 2023040000969}, "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 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2023"}, "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": 116130.21641704913}, "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": ["Egypt", "Sudan"]}, "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": 18.5}, "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": 33.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "33.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.75}, "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": {"2023-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 21.75], [28.25, 22.0], [28.35, 22.25], [28.25, 22.5], [28.47, 23.03], [29.0, 23.25], [29.53, 23.03], [29.68, 22.68], [29.75, 22.65], [30.0, 22.75], [30.53, 22.53], [30.68, 22.18], [30.75, 22.15], [31.0, 22.25], [31.53, 22.03], [31.75, 21.5], [31.65, 21.25], [31.75, 21.0], [31.65, 20.75], [31.68, 20.68], [31.75, 20.65], [32.0, 20.75], [32.53, 20.53], [32.68, 20.18], [33.03, 20.03], [33.18, 19.68], [33.53, 19.53], [33.68, 19.18], [34.03, 19.03], [34.25, 18.5], [34.03, 17.97], [33.68, 17.82], [33.53, 17.47], [33.0, 17.25], [32.75, 17.35], [32.5, 17.25], [32.25, 17.35], [32.0, 17.25], [31.47, 17.47], [31.32, 17.82], [30.97, 17.97], [30.82, 18.32], [30.47, 18.47], [30.32, 18.82], [29.97, 18.97], [29.82, 19.32], [29.47, 19.47], [29.25, 20.0], [29.35, 20.25], [29.32, 20.32], [29.25, 20.35], [29.0, 20.25], [28.47, 20.47], [28.25, 21.0], [28.35, 21.25], [28.25, 21.5], [28.35, 21.75]]]]}, "2023-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 21.75], [28.25, 22.0], [28.35, 22.25], [28.25, 22.5], [28.47, 23.03], [29.0, 23.25], [29.53, 23.03], [29.68, 22.68], [29.75, 22.65], [30.0, 22.75], [30.53, 22.53], [30.68, 22.18], [30.75, 22.15], [31.0, 22.25], [31.53, 22.03], [31.75, 21.5], [31.65, 21.25], [31.75, 21.0], [31.65, 20.75], [31.68, 20.68], [31.75, 20.65], [32.0, 20.75], [32.53, 20.53], [32.68, 20.18], [33.03, 20.03], [33.18, 19.68], [33.53, 19.53], [33.68, 19.18], [34.03, 19.03], [34.25, 18.5], [34.03, 17.97], [33.68, 17.82], [33.53, 17.47], [33.0, 17.25], [32.75, 17.35], [32.5, 17.25], [32.25, 17.35], [32.0, 17.25], [31.47, 17.47], [31.32, 17.82], [30.97, 17.97], [30.82, 18.32], [30.47, 18.47], [30.32, 18.82], [29.97, 18.97], [29.82, 19.32], [29.47, 19.47], [29.25, 20.0], [29.35, 20.25], [29.32, 20.32], [29.25, 20.35], [29.0, 20.25], [28.47, 20.47], [28.25, 21.0], [28.35, 21.25], [28.25, 21.5], [28.35, 21.75]]]]}, "2023-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 21.75], [28.25, 22.0], [28.35, 22.25], [28.25, 22.5], [28.47, 23.03], [29.0, 23.25], [29.53, 23.03], 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"description": "Mean t2m anomaly over entire duration", "value": -4.843023259013184}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.16242184642033, 25.793634089900024, 26.725923212014834]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.610106769698234, 22.853552994585414, 23.834358286884196]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.807586603286145, -5.273399839765963, -4.448083333987446]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.777059917962902, -5.7660364330327525, -4.843669718461172]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5864009171061808, -1.770796964611245, -1.5183350119540613]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7542166837856812, -2.0258755522677636, -1.761983186663861]}}