{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:09.494395", "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-May-29_to_2025-Jun-01_39.5_23.5"}, "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": 2025050000724}, "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": "May 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 2025"}, "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": 135474.05305451973}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 23.5}, "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": 39.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 36.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[40.18, 25.68], [40.53, 25.53], [40.75, 25.0], [40.65, 24.75], [40.68, 24.68], [40.75, 24.65], [41.0, 24.75], [41.53, 24.53], [41.68, 24.18], [42.03, 24.03], [42.25, 23.5], [42.13, 23.2], [42.53, 23.03], [42.75, 22.5], [42.65, 22.25], [42.75, 22.0], [42.53, 21.47], [42.18, 21.32], [42.03, 20.97], [41.5, 20.75], [41.25, 20.85], [41.0, 20.75], [40.5, 20.96], [40.0, 20.75], [39.47, 20.97], [39.25, 21.5], [39.35, 21.75], [39.32, 21.82], [38.97, 21.97], [38.75, 22.5], [38.85, 22.75], [38.82, 22.82], [38.47, 22.97], [38.25, 23.5], [38.35, 23.75], [38.32, 23.82], [38.25, 23.85], [38.0, 23.75], [37.47, 23.97], [37.25, 24.5], [37.35, 24.75], [37.25, 25.0], [37.35, 25.25], [37.32, 25.32], [36.97, 25.47], [36.82, 25.82], [36.47, 25.97], [36.25, 26.5], [36.35, 26.75], [36.32, 26.82], [35.97, 26.97], [35.75, 27.5], [35.97, 28.03], [36.5, 28.25], [37.03, 28.03], [37.18, 27.68], [37.53, 27.53], [37.68, 27.18], [38.03, 27.03], [38.18, 26.68], [38.5, 26.54], [39.0, 26.75], [39.53, 26.53], [39.68, 26.18], [40.03, 26.03], [40.18, 25.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, 26.97], [35.75, 27.5], [35.97, 28.03], [36.5, 28.25], [37.03, 28.03], [37.18, 27.68], [37.53, 27.53], [37.68, 27.18], [38.03, 27.03], [38.18, 26.68], [38.5, 26.54], [39.0, 26.75], [39.53, 26.53], [39.68, 26.18], [40.03, 26.03], [40.18, 25.68], [40.53, 25.53], [40.75, 25.0], [40.65, 24.75], [40.68, 24.68], [40.75, 24.65], [41.0, 24.75], [41.53, 24.53], [41.68, 24.18], [42.03, 24.03], [42.25, 23.5], [42.03, 22.97], [41.68, 22.82], [41.53, 22.47], [41.13, 22.3], [41.25, 22.0], [41.03, 21.47], [40.68, 21.32], [40.53, 20.97], [40.0, 20.75], [39.47, 20.97], [39.25, 21.5], [39.35, 21.75], [39.32, 21.82], [38.97, 21.97], [38.75, 22.5], [38.85, 22.75], [38.82, 22.82], [38.47, 22.97], [38.25, 23.5], [38.35, 23.75], [38.32, 23.82], [38.25, 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26.164131418863974, 28.02693583170577]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.981209638753006, -3.032262294274395, -2.783721213332695, -2.234171474910256]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.2293616956848155, -4.054455587388475, -3.9035155278935463, -2.988516904170467]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8158332155781487, -2.030804941815084, -1.8533635195975953, -1.5140445953107102]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.369090158505725, -2.7826324889515486, -2.660714019402239, -1.832123075738804]}}