{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:23.077383", "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": "2010-Dec-29_to_2011-Jan-01_28.0_45.5"}, "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": 2010120001364}, "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": "December 29 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2011"}, "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": 55430.32518076322}, "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": ["Moldova", "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": []}, "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": 45.5}, "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.75}, "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": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, 48.5], [25.97, 49.03], [26.5, 49.25], [27.03, 49.03], [27.18, 48.68], [27.53, 48.53], [27.68, 48.18], [27.75, 48.15], [28.0, 48.25], [28.53, 48.03], [28.68, 47.68], [28.75, 47.65], [29.0, 47.75], [29.53, 47.53], [29.68, 47.18], [30.03, 47.03], [30.25, 46.5], [30.03, 45.97], [29.68, 45.82], [29.53, 45.47], [29.18, 45.32], [29.15, 45.25], [29.25, 45.0], [29.03, 44.47], [28.5, 44.25], [28.25, 44.35], [28.0, 44.25], [27.47, 44.47], [27.32, 44.82], [26.97, 44.97], [26.75, 45.5], [26.85, 45.75], [26.75, 46.0], [26.85, 46.25], [26.82, 46.32], [26.47, 46.47], [26.25, 47.0], [26.35, 47.25], [26.25, 47.5], [26.35, 47.75], [26.32, 47.82], [25.97, 47.97], [25.75, 48.5]]]]}, "2010-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, 48.5], [25.97, 49.03], [26.5, 49.25], [27.03, 49.03], [27.18, 48.68], [27.53, 48.53], [27.68, 48.18], [27.75, 48.15], [28.0, 48.25], [28.53, 48.03], [28.68, 47.68], [28.75, 47.65], [29.0, 47.75], [29.53, 47.53], [29.68, 47.18], [30.03, 47.03], [30.25, 46.5], [30.03, 45.97], [29.68, 45.82], [29.53, 45.47], [29.18, 45.32], [29.15, 45.25], [29.25, 45.0], [29.03, 44.47], [28.68, 44.32], [28.53, 43.97], [28.0, 43.75], [27.75, 43.85], [27.5, 43.75], [26.97, 43.97], [26.75, 44.5], [26.96, 45.0], [26.75, 45.5], [26.85, 45.75], [26.75, 46.0], [26.85, 46.25], [26.82, 46.32], [26.47, 46.47], [26.25, 47.0], [26.35, 47.25], [26.25, 47.5], [26.35, 47.75], [26.32, 47.82], [25.97, 47.97], [25.75, 48.5]]]]}, "2010-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, 48.5], [25.97, 49.03], [26.5, 49.25], [27.03, 49.03], [27.18, 48.68], [27.53, 48.53], [27.68, 48.18], [27.75, 48.15], [28.0, 48.25], [28.53, 48.03], [28.68, 47.68], [28.75, 47.65], [29.0, 47.75], [29.53, 47.53], [29.68, 47.18], [30.03, 47.03], [30.25, 46.5], [30.03, 45.97], [29.68, 45.82], [29.53, 45.47], [29.18, 45.32], [29.15, 45.25], [29.25, 45.0], [29.03, 44.47], [28.68, 44.32], [28.53, 43.97], [28.0, 43.75], [27.75, 43.85], [27.5, 43.75], [26.97, 43.97], [26.75, 44.5], [26.96, 45.0], [26.75, 45.5], [26.85, 45.75], [26.75, 46.0], [26.85, 46.25], [26.82, 46.32], [26.47, 46.47], [26.25, 47.0], [26.35, 47.25], [26.25, 47.5], [26.35, 47.75], [26.32, 47.82], [25.97, 47.97], [25.75, 48.5]]]]}, "2011-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.25, 45.5], [27.47, 46.03], [28.0, 46.25], [28.25, 46.15], [28.5, 46.25], [29.03, 46.03], [29.25, 45.5], [29.03, 44.97], [28.68, 44.82], [28.65, 44.75], [28.75, 44.5], [28.53, 43.97], [28.0, 43.75], [27.75, 43.85], [27.5, 43.75], [26.97, 43.97], [26.75, 44.5], [26.97, 45.03], [27.32, 45.18], [27.35, 45.25], [27.25, 45.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.941335715539594}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.801596968777597}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.117534277323728, -9.967927479634113, -9.213696545851064, -7.469525367148037]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.279767740407465, -13.387282055034404, -10.562865241258294, -8.020813593365858]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.309019969478058, -9.154400962914256, -8.27216879629879, -7.284412292794547]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.33928656237623, -11.941335715539594, -9.211328519462711, -7.645023336107329]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6958573899856197, -1.7214106372845177, -1.5959350405514603, -1.554037717132478]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9723853220268042, -2.193590422236895, -1.793702788962205, -1.637594155695012]}}