{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:54.544998", "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-30_to_2025-Jul-02_39.5_53.5"}, "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": 2025060001024}, "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 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 02 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": 78469.51783747759}, "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": ["Russian Federation"]}, "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": 53.5}, "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": 35.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[34.75, 52.5], [34.97, 53.03], [35.5, 53.25], [35.75, 53.15], [36.0, 53.25], [36.25, 53.15], [36.5, 53.25], [36.75, 53.15], [37.0, 53.25], [37.25, 53.15], [37.32, 53.18], [37.47, 53.53], [38.0, 53.75], [38.25, 53.65], [38.5, 53.75], [38.75, 53.65], [38.82, 53.68], [38.97, 54.03], [39.5, 54.25], [40.03, 54.03], [40.18, 53.68], [40.25, 53.65], [40.5, 53.75], [40.75, 53.65], [40.82, 53.68], [40.97, 54.03], [41.5, 54.25], [41.75, 54.15], [41.82, 54.18], [41.97, 54.53], [42.32, 54.68], [42.47, 55.03], [43.0, 55.25], [43.53, 55.03], [43.68, 54.68], [44.03, 54.53], [44.25, 54.0], [44.15, 53.75], [44.25, 53.5], [44.15, 53.25], [44.25, 53.0], [44.03, 52.47], [43.5, 52.25], [43.25, 52.35], [43.0, 52.25], [42.75, 52.35], [42.5, 52.25], [42.25, 52.35], [42.0, 52.25], [41.75, 52.35], [41.5, 52.25], [41.25, 52.35], [41.18, 52.32], [41.03, 51.97], [40.5, 51.75], [40.25, 51.85], [40.0, 51.75], [39.75, 51.85], [39.5, 51.75], [39.25, 51.85], [39.18, 51.82], [39.03, 51.47], [38.5, 51.25], [38.25, 51.35], [38.0, 51.25], [37.75, 51.35], [37.68, 51.32], [37.53, 50.97], [37.0, 50.75], [36.47, 50.97], [36.32, 51.32], [36.25, 51.35], [36.18, 51.32], [36.03, 50.97], [35.5, 50.75], [34.97, 50.97], [34.75, 51.5], [34.85, 51.75], [34.75, 52.0], [34.85, 52.25], [34.75, 52.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe", "E.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 52.0], [34.85, 52.25], [34.75, 52.5], [34.97, 53.03], [35.5, 53.25], [35.75, 53.15], [36.0, 53.25], [36.25, 53.15], [36.5, 53.25], [36.75, 53.15], [37.0, 53.25], [37.25, 53.15], [37.32, 53.18], [37.47, 53.53], [38.0, 53.75], [38.25, 53.65], [38.5, 53.75], [38.75, 53.65], [38.82, 53.68], [38.97, 54.03], [39.5, 54.25], [40.03, 54.03], [40.18, 53.68], [40.25, 53.65], [40.5, 53.75], [40.75, 53.65], [40.82, 53.68], [40.97, 54.03], [41.5, 54.25], [41.75, 54.15], [41.82, 54.18], [41.97, 54.53], [42.32, 54.68], [42.47, 55.03], [43.0, 55.25], [43.53, 55.03], [43.68, 54.68], [44.03, 54.53], [44.25, 54.0], [44.15, 53.75], [44.25, 53.5], [44.15, 53.25], [44.25, 53.0], [44.03, 52.47], [43.5, 52.25], [43.25, 52.35], [43.0, 52.25], [42.75, 52.35], [42.5, 52.25], [42.25, 52.35], [42.0, 52.25], [41.75, 52.35], [41.5, 52.25], [41.25, 52.35], [41.18, 52.32], [41.03, 51.97], [40.5, 51.75], [40.25, 51.85], [40.0, 51.75], [39.75, 51.85], [39.5, 51.75], [39.25, 51.85], [39.18, 51.82], [39.03, 51.47], [38.5, 51.25], [38.25, 51.35], [38.0, 51.25], [37.75, 51.35], [37.68, 51.32], [37.53, 50.97], [37.0, 50.75], [36.47, 50.97], [36.32, 51.32], [36.25, 51.35], [36.18, 51.32], [36.03, 50.97], [35.5, 50.75], [34.97, 50.97], [34.75, 51.5], [34.85, 51.75], [34.75, 52.0]]]]}, "2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 52.0], [34.85, 52.25], [34.75, 52.5], [34.97, 53.03], [35.5, 53.25], [35.75, 53.15], [36.0, 53.25], [36.25, 53.15], [36.5, 53.25], [36.75, 53.15], [37.0, 53.25], [37.25, 53.15], [37.32, 53.18], [37.47, 53.53], [38.0, 53.75], [38.25, 53.65], [38.5, 53.75], [38.75, 53.65], [38.82, 53.68], [38.97, 54.03], [39.5, 54.25], [40.03, 54.03], [40.18, 53.68], [40.25, 53.65], [40.5, 53.75], [40.75, 53.65], [40.82, 53.68], [40.97, 54.03], [41.5, 54.25], [41.75, 54.15], [41.82, 54.18], [41.97, 54.53], [42.32, 54.68], [42.47, 55.03], [43.0, 55.25], [43.53, 55.03], [43.68, 54.68], [44.03, 54.53], [44.25, 54.0], [44.15, 53.75], [44.25, 53.5], [44.15, 53.25], [44.25, 53.0], [44.03, 52.47], [43.5, 52.25], [43.25, 52.35], [43.0, 52.25], [42.75, 52.35], [42.5, 52.25], [42.25, 52.35], [42.0, 52.25], [41.75, 52.35], [41.5, 52.25], [41.25, 52.35], [41.18, 52.32], [41.03, 51.97], [40.5, 51.75], [40.25, 51.85], [40.0, 51.75], [39.75, 51.85], [39.5, 51.75], [39.25, 51.85], [39.18, 51.82], [39.03, 51.47], [38.5, 51.25], [38.25, 51.35], [38.0, 51.25], [37.75, 51.35], [37.68, 51.32], [37.53, 50.97], [37.0, 50.75], [36.47, 50.97], [36.32, 51.32], [36.25, 51.35], [36.18, 51.32], [36.03, 50.97], [35.5, 50.75], [34.97, 50.97], [34.75, 51.5], [34.85, 51.75], [34.75, 52.0]]]]}, "2025-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 52.0], [34.85, 52.25], [34.75, 52.5], [34.97, 53.03], [35.5, 53.25], [35.75, 53.15], [36.0, 53.25], [36.25, 53.15], [36.5, 53.25], [36.75, 53.15], [37.0, 53.25], [37.25, 53.15], [37.32, 53.18], [37.47, 53.53], [38.0, 53.75], [38.25, 53.65], [38.5, 53.75], [38.75, 53.65], [38.82, 53.68], [38.97, 54.03], [39.5, 54.25], [40.03, 54.03], [40.18, 53.68], [40.25, 53.65], [40.5, 53.75], [40.75, 53.65], [40.82, 53.68], [40.97, 54.03], [41.5, 54.25], [41.75, 54.15], [41.82, 54.18], [41.97, 54.53], [42.32, 54.68], [42.47, 55.03], [43.0, 55.25], [43.53, 55.03], [43.68, 54.68], [44.03, 54.53], [44.25, 54.0], [44.15, 53.75], [44.25, 53.5], [44.15, 53.25], [44.25, 53.0], [44.03, 52.47], [43.5, 52.25], [43.25, 52.35], [43.0, 52.25], [42.75, 52.35], [42.5, 52.25], [42.25, 52.35], [42.0, 52.25], [41.75, 52.35], [41.5, 52.25], [41.25, 52.35], [41.18, 52.32], [41.03, 51.97], [40.5, 51.75], [40.25, 51.85], [40.0, 51.75], [39.75, 51.85], [39.5, 51.75], [39.25, 51.85], [39.18, 51.82], [39.03, 51.47], [38.5, 51.25], [38.25, 51.35], [38.0, 51.25], [37.75, 51.35], [37.68, 51.32], [37.53, 50.97], [37.0, 50.75], [36.47, 50.97], [36.32, 51.32], [36.25, 51.35], [36.18, 51.32], [36.03, 50.97], [35.5, 50.75], [34.97, 50.97], [34.75, 51.5], [34.85, 51.75], [34.75, 52.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.506174834034653}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.7896512522475145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.624749695308594, 13.531338295103978, 14.749441431439095]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.511187489827478, 12.541532135009788, 13.659514363606775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.469429933784022, -5.56203701489922, -4.337486808059308]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.527021768669442, -6.506174834034653, -5.33046771095286]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3392828293701902, -1.7341836327827722, -1.3730194023883247]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6040058955557923, -1.9782694942041383, -1.619612489416513]}}