{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:16.371673", "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-Jan-17_to_2025-Jan-21_359.0_49.5"}, "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": 2025010000466}, "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": "January 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 65230.899461537716}, "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": ["France"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": ["Bay of Biscay", "English Channel"]}, "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": 49.5}, "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": 359.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 360.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 49.03], [-3.18, 49.18], [-3.03, 49.53], [-2.68, 49.68], [-2.65, 49.75], [-2.75, 50.0], [-2.53, 50.53], [-2.0, 50.75], [-1.75, 50.65], [-1.5, 50.75], [-1.25, 50.65], [-1.0, 50.75], [-0.75, 50.65], [-0.5, 50.75], [-0.25, 50.65], [0.0, 50.75], [0.53, 50.53], [0.75, 50.0], [0.53, 49.47], [0.18, 49.32], [0.03, 48.97], [-0.5, 48.75], [-0.75, 48.85], [-0.82, 48.82], [-0.97, 48.47], [-1.5, 48.25], [-1.75, 48.35], [-1.82, 48.32], [-1.85, 48.25], [-1.82, 48.18], [-1.47, 48.03], [-1.25, 47.5], [-1.47, 46.97], [-2.0, 46.75], [-2.25, 46.85], [-2.5, 46.75], [-3.03, 46.97], [-3.18, 47.32], [-3.53, 47.47], [-3.75, 48.0], [-3.65, 48.25], [-3.75, 48.5], [-3.53, 49.03]]]]}, "2025-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 49.03], [-3.18, 49.18], [-3.03, 49.53], [-2.68, 49.68], [-2.65, 49.75], [-2.75, 50.0], [-2.53, 50.53], [-2.0, 50.75], [-1.75, 50.65], [-1.5, 50.75], [-1.25, 50.65], [-1.0, 50.75], [-0.75, 50.65], [-0.5, 50.75], [-0.25, 50.65], [0.0, 50.75], [0.25, 50.65], [0.5, 50.75], [1.03, 50.53], [1.25, 50.0], [1.03, 49.47], [0.68, 49.32], [0.54, 49.0], [0.75, 48.5], [0.53, 47.97], [0.0, 47.75], [-0.25, 47.85], [-0.32, 47.82], [-0.47, 47.47], [-0.82, 47.32], [-0.85, 47.25], [-0.75, 47.0], [-0.97, 46.47], [-1.5, 46.25], [-1.75, 46.35], [-2.0, 46.25], [-2.53, 46.47], [-2.68, 46.82], [-3.03, 46.97], [-3.18, 47.32], [-3.53, 47.47], [-3.75, 48.0], [-3.65, 48.25], [-3.75, 48.5], [-3.53, 49.03]]]]}, "2025-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 49.03], [-3.18, 49.18], [-3.03, 49.53], [-2.68, 49.68], [-2.65, 49.75], [-2.75, 50.0], [-2.53, 50.53], [-2.0, 50.75], [-1.75, 50.65], [-1.5, 50.75], [-1.25, 50.65], [-1.0, 50.75], [-0.75, 50.65], [-0.5, 50.75], [-0.25, 50.65], [0.0, 50.75], [0.25, 50.65], [0.5, 50.75], [1.03, 50.53], [1.25, 50.0], [1.03, 49.47], [0.68, 49.32], [0.54, 49.0], [0.75, 48.5], [0.53, 47.97], [0.0, 47.75], [-0.25, 47.85], [-0.32, 47.82], [-0.47, 47.47], [-0.82, 47.32], [-0.85, 47.25], [-0.75, 47.0], [-0.97, 46.47], [-1.5, 46.25], [-1.75, 46.35], [-2.0, 46.25], [-2.53, 46.47], [-2.68, 46.82], [-3.03, 46.97], [-3.18, 47.32], [-3.53, 47.47], [-3.75, 48.0], [-3.65, 48.25], [-3.75, 48.5], [-3.53, 49.03]]]]}, "2025-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 49.03], [-3.18, 49.18], [-3.03, 49.53], [-2.68, 49.68], [-2.53, 50.03], [-2.0, 50.25], [-1.75, 50.15], [-1.5, 50.25], [-1.25, 50.15], [-1.0, 50.25], [-0.75, 50.15], [-0.5, 50.25], [-0.25, 50.15], [-0.18, 50.18], [-0.03, 50.53], [0.5, 50.75], [1.03, 50.53], [1.25, 50.0], [1.03, 49.47], [0.68, 49.32], [0.54, 49.0], [0.75, 48.5], [0.53, 47.97], [0.0, 47.75], [-0.25, 47.85], [-0.32, 47.82], [-0.47, 47.47], [-0.82, 47.32], [-0.85, 47.25], [-0.75, 47.0], [-0.97, 46.47], [-1.5, 46.25], [-1.75, 46.35], [-2.0, 46.25], [-2.53, 46.47], [-2.68, 46.82], [-3.03, 46.97], [-3.18, 47.32], [-3.53, 47.47], [-3.75, 48.0], [-3.65, 48.25], [-3.75, 48.5], [-3.53, 49.03]]]]}, "2025-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.68, 49.68], [-2.53, 50.03], [-2.0, 50.25], [-1.75, 50.15], [-1.5, 50.25], [-1.25, 50.15], [-1.0, 50.25], [-0.47, 50.03], [-0.25, 49.5], [-0.47, 48.97], [-1.0, 48.75], [-1.25, 48.85], [-1.5, 48.75], [-1.75, 48.85], [-1.82, 48.82], [-1.97, 48.47], [-2.32, 48.32], [-2.47, 47.97], [-3.0, 47.75], [-3.53, 47.97], [-3.75, 48.5], [-3.53, 49.03], [-3.18, 49.18], [-3.03, 49.53], [-2.68, 49.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.948695090851743}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.722245507018684}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.588560288040753, 1.3352447509765852, 2.1870958964030365, 1.2188445458045862, 3.3716583251953125]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1441881815592865, -0.7072230021158816, -0.18582890828446352, -0.7278388977050554, 1.7652781168620209]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8424861476472327, -5.407493396346107, -4.454939813233986, -4.994799782451471, -3.797266917031982]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.964606900130093, -6.948695090851743, -5.261286083439927, -6.135175600271737, -4.341063009889012]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5313763471084916, -1.8915538932927682, -1.56773322052513, -1.5998893529624085, -1.514333221846099]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.793742723342194, -2.2831693528452544, -2.0104896392200704, -1.894125045487604, -1.626954385805915]}}