{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:32.141027", "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": "2026-Feb-01_to_2026-Feb-03_31.5_46.5"}, "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": 2026020000047}, "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": "February 01 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 03 2026"}, "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": 56270.088944610776}, "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": ["Romania", "Ukraine"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "West&Central-Europe"]}, "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": ["Black Sea"]}, "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": 46.5}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\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": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, 45.68], [29.35, 45.75], [29.25, 46.0], [29.47, 46.53], [30.0, 46.75], [30.25, 46.65], [30.32, 46.68], [30.47, 47.03], [31.0, 47.25], [31.25, 47.15], [31.5, 47.25], [31.75, 47.15], [32.0, 47.25], [32.53, 47.03], [32.68, 46.68], [32.75, 46.65], [33.0, 46.75], [33.25, 46.65], [33.5, 46.75], [34.03, 46.53], [34.25, 46.0], [34.03, 45.47], [33.5, 45.25], [33.25, 45.35], [33.18, 45.32], [33.15, 45.25], [33.25, 45.0], [33.03, 44.47], [32.5, 44.25], [32.25, 44.35], [32.0, 44.25], [31.75, 44.35], [31.5, 44.25], [31.25, 44.35], [31.0, 44.25], [30.75, 44.35], [30.5, 44.25], [30.25, 44.35], [30.18, 44.32], [30.03, 43.97], [29.5, 43.75], [29.25, 43.85], [29.0, 43.75], [28.47, 43.97], [28.25, 44.5], [28.47, 45.03], [28.82, 45.18], [28.97, 45.53], [29.32, 45.68]]]]}, "2026-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, 45.68], [29.35, 45.75], [29.25, 46.0], [29.47, 46.53], [30.0, 46.75], [30.25, 46.65], [30.32, 46.68], [30.47, 47.03], [31.0, 47.25], [31.25, 47.15], [31.5, 47.25], [31.75, 47.15], [32.0, 47.25], [32.53, 47.03], [32.68, 46.68], [32.75, 46.65], [33.0, 46.75], [33.25, 46.65], [33.5, 46.75], [34.03, 46.53], [34.25, 46.0], [34.03, 45.47], [33.5, 45.25], [33.25, 45.35], [33.18, 45.32], [33.15, 45.25], [33.25, 45.0], [33.03, 44.47], [32.5, 44.25], [32.25, 44.35], [32.0, 44.25], [31.75, 44.35], [31.5, 44.25], [31.25, 44.35], [31.0, 44.25], [30.75, 44.35], [30.5, 44.25], [30.25, 44.35], [30.18, 44.32], [30.03, 43.97], [29.5, 43.75], [29.25, 43.85], [29.0, 43.75], [28.47, 43.97], [28.25, 44.5], [28.47, 45.03], [28.82, 45.18], [28.97, 45.53], [29.32, 45.68]]]]}, "2026-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, 45.68], [29.35, 45.75], [29.25, 46.0], [29.47, 46.53], [30.0, 46.75], [30.25, 46.65], [30.32, 46.68], [30.47, 47.03], [31.0, 47.25], [31.25, 47.15], [31.5, 47.25], [31.75, 47.15], [32.0, 47.25], [32.53, 47.03], [32.68, 46.68], [32.75, 46.65], [33.0, 46.75], [33.25, 46.65], [33.5, 46.75], [34.03, 46.53], [34.25, 46.0], [34.03, 45.47], [33.5, 45.25], [33.25, 45.35], [33.18, 45.32], [33.15, 45.25], [33.25, 45.0], [33.03, 44.47], [32.5, 44.25], [32.25, 44.35], [32.0, 44.25], [31.75, 44.35], [31.5, 44.25], [31.25, 44.35], [31.0, 44.25], [30.75, 44.35], [30.5, 44.25], [30.25, 44.35], [30.18, 44.32], [30.03, 43.97], [29.5, 43.75], [29.25, 43.85], [29.0, 43.75], [28.47, 43.97], [28.25, 44.5], [28.47, 45.03], [28.82, 45.18], [28.97, 45.53], [29.32, 45.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.493265225161508}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.361813249887076}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.1697217892377125, -3.838359578450536, -4.505172377366307]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.773387654622354, -8.19806009928385, -8.315224711100257]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.290119261989212, -6.0357530561554364, -6.75956743151658]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.3827585925774315, -8.178120765900019, -8.493265225161508]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.672673051358891, -1.611274654911983, -1.8201873981781787]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9102558828804586, -1.9934635212074183, -2.167628133633296]}}