{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:43.516557", "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-Jun-13_to_2025-Jun-15_33.0_49.0"}, "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": 2025060000490}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 15 2025"}, "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": 63307.79253188137}, "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": ["Ukraine"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 49.0}, "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": 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": 33.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[33.0, 49.75], [33.53, 49.53], [33.68, 49.18], [33.75, 49.15], [34.0, 49.25], [34.25, 49.15], [34.5, 49.25], [34.75, 49.15], [34.82, 49.18], [34.97, 49.53], [35.32, 49.68], [35.47, 50.03], [36.0, 50.25], [36.25, 50.15], [36.32, 50.18], [36.47, 50.53], [37.0, 50.75], [37.25, 50.65], [37.5, 50.75], [38.03, 50.53], [38.18, 50.18], [38.53, 50.03], [38.75, 49.5], [38.53, 48.97], [38.18, 48.82], [38.03, 48.47], [37.68, 48.32], [37.53, 47.97], [37.0, 47.75], [36.75, 47.85], [36.68, 47.82], [36.53, 47.47], [36.0, 47.25], [35.75, 47.35], [35.68, 47.32], [35.53, 46.97], [35.0, 46.75], [34.75, 46.85], [34.5, 46.75], [34.0, 46.96], [33.5, 46.75], [32.97, 46.97], [32.82, 47.32], [32.47, 47.47], [32.25, 48.0], [32.46, 48.5], [32.25, 49.0], [32.47, 49.53], [33.0, 49.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.25, 49.0], [32.47, 49.53], [33.0, 49.75], [33.53, 49.53], [33.68, 49.18], [33.75, 49.15], [34.0, 49.25], [34.25, 49.15], [34.5, 49.25], [34.75, 49.15], [34.82, 49.18], [34.97, 49.53], [35.32, 49.68], [35.47, 50.03], [36.0, 50.25], [36.25, 50.15], [36.32, 50.18], [36.47, 50.53], [37.0, 50.75], [37.25, 50.65], [37.5, 50.75], [38.03, 50.53], [38.18, 50.18], [38.53, 50.03], [38.75, 49.5], [38.53, 48.97], [38.18, 48.82], [38.03, 48.47], [37.68, 48.32], [37.53, 47.97], [37.0, 47.75], [36.75, 47.85], [36.68, 47.82], [36.53, 47.47], [36.0, 47.25], [35.75, 47.35], [35.68, 47.32], [35.53, 46.97], [35.0, 46.75], [34.75, 46.85], [34.5, 46.75], [34.0, 46.96], [33.5, 46.75], [32.97, 46.97], [32.82, 47.32], [32.47, 47.47], [32.25, 48.0], [32.46, 48.5], [32.25, 49.0]]]]}, "2025-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.25, 49.0], [32.47, 49.53], [33.0, 49.75], [33.53, 49.53], [33.68, 49.18], [33.75, 49.15], [34.0, 49.25], [34.25, 49.15], [34.5, 49.25], [34.75, 49.15], [34.82, 49.18], [34.97, 49.53], [35.32, 49.68], [35.47, 50.03], [36.0, 50.25], [36.25, 50.15], [36.32, 50.18], [36.47, 50.53], [37.0, 50.75], [37.25, 50.65], [37.5, 50.75], [38.03, 50.53], [38.18, 50.18], [38.53, 50.03], [38.75, 49.5], [38.53, 48.97], [38.18, 48.82], [38.03, 48.47], [37.68, 48.32], [37.53, 47.97], [37.0, 47.75], [36.75, 47.85], [36.68, 47.82], [36.53, 47.47], [36.0, 47.25], [35.75, 47.35], [35.68, 47.32], [35.53, 46.97], [35.0, 46.75], [34.75, 46.85], [34.5, 46.75], [34.0, 46.96], [33.5, 46.75], [32.97, 46.97], [32.82, 47.32], [32.47, 47.47], [32.25, 48.0], [32.46, 48.5], [32.25, 49.0]]]]}, "2025-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.25, 49.0], [32.47, 49.53], [33.0, 49.75], [33.53, 49.53], [33.68, 49.18], [33.75, 49.15], [34.0, 49.25], [34.25, 49.15], [34.5, 49.25], [34.75, 49.15], [34.82, 49.18], [34.97, 49.53], [35.32, 49.68], [35.47, 50.03], [36.0, 50.25], [36.25, 50.15], [36.32, 50.18], [36.47, 50.53], [37.0, 50.75], [37.25, 50.65], [37.5, 50.75], [38.03, 50.53], [38.18, 50.18], [38.53, 50.03], [38.75, 49.5], [38.53, 48.97], [38.18, 48.82], [38.03, 48.47], [37.68, 48.32], [37.53, 47.97], [37.0, 47.75], [36.75, 47.85], [36.68, 47.82], [36.53, 47.47], [36.0, 47.25], [35.75, 47.35], [35.68, 47.32], [35.53, 46.97], [35.0, 46.75], [34.75, 46.85], [34.5, 46.75], [34.0, 46.96], [33.5, 46.75], [32.97, 46.97], [32.82, 47.32], [32.47, 47.47], [32.25, 48.0], [32.46, 48.5], [32.25, 49.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.964854917525827}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.634547236705205}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.133231427592648, 16.607703104326788, 16.160397691624155]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.440024312337243, 15.643308258056663, 15.499033864339196]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.838201898626215, -4.355960750177481, -4.709479061311919]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.964854917525827, -5.021431043243183, -5.379147823932726]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4369061206516553, -1.3228197207023011, -1.4095452246926565]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8202432972211122, -1.6432369846052814, -1.5850575304086436]}}