{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:48.920198", "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": "2025-Nov-19_to_2025-Nov-24_43.5_17.5"}, "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": 2025110000535}, "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": "November 19 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 85754.46320109253}, "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": ["Saudi Arabia", "Yemen"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia"]}, "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": 17.5}, "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": 43.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 42.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[46.18, 15.18], [46.25, 15.15], [46.5, 15.25], [47.03, 15.03], [47.25, 14.5], [47.03, 13.97], [46.5, 13.75], [46.25, 13.85], 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.85, 15.25], [43.75, 15.5], [43.97, 16.03], [44.5, 16.25], [45.03, 16.03], [45.2, 15.63], [45.5, 15.75], [46.03, 15.53], [46.18, 15.18], [46.25, 15.15], [46.5, 15.25], [47.03, 15.03], [47.25, 14.5], [47.03, 13.97], [46.5, 13.75], [46.25, 13.85], [46.0, 13.75], [45.5, 13.96], [45.0, 13.75], [44.75, 13.85], [44.5, 13.75], [43.97, 13.97], [43.75, 14.5], [43.85, 14.75], [43.75, 15.0], [43.85, 15.25]]], [[[41.75, 19.0], [41.97, 19.53], [42.5, 19.75], [42.75, 19.65], [43.0, 19.75], [43.25, 19.65], [43.5, 19.75], [44.03, 19.53], [44.25, 19.0], [44.15, 18.75], [44.25, 18.5], [44.15, 18.25], [44.25, 18.0], [44.15, 17.75], [44.18, 17.68], [44.53, 17.53], [44.75, 17.0], [44.53, 16.47], [44.0, 16.25], [43.47, 16.47], [43.32, 16.82], [42.97, 16.97], [42.75, 17.5], [42.85, 17.75], [42.82, 17.82], 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daily evolution of maximum t2m.", "value": [11.37666727701827, 10.873979187011741, 10.670894877115927, 10.715353902180993, 11.974604543050134, 17.48804117838546]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6257412820697557, -2.7215686437989652, -2.8438085327839127, -3.1795592731719977, -2.7502746680809547, -2.642891896354854]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0726800288595086, -3.2697656994511703, -3.484292675706911, -3.9438100271427174, -3.303224848465561, -2.642891896354854]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.559118893968977, -1.695563548032288, -1.6994608542968144, -1.8781690487563292, -1.5965673551316397, -1.217592559381651]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8271899834297118, -2.1986174382071364, -2.3231605684803087, -2.59766103957686, -2.1442056333446673, -1.217592559381651]}}