{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:37:15.458483", "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": "2023-Dec-23_to_2023-Dec-27_354.0_41.5"}, "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": 2023120000394}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2023"}, "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": 50876.47695324}, "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": ["Portugal", "Spain"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 41.5}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.0, 42.25], [-6.75, 42.15], [-6.5, 42.25], [-6.25, 42.15], [-6.0, 42.25], [-5.47, 42.03], [-5.25, 41.5], [-5.47, 40.97], [-6.0, 40.75], [-6.25, 40.85], [-6.32, 40.82], [-6.47, 40.47], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.03, 40.47], [-8.25, 41.0], [-8.03, 41.53], [-7.68, 41.68], [-7.53, 42.03], [-7.0, 42.25]]]]}, "2023-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.0, 42.25], [-6.75, 42.15], [-6.5, 42.25], [-6.25, 42.15], [-6.18, 42.18], [-6.03, 42.53], [-5.5, 42.75], [-4.97, 42.53], [-4.82, 42.18], [-4.75, 42.15], [-4.5, 42.25], [-4.0, 42.04], [-3.5, 42.25], [-2.97, 42.03], [-2.75, 41.5], [-2.97, 40.97], [-3.5, 40.75], [-4.0, 40.96], [-4.32, 40.82], [-4.47, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.03, 40.47], [-8.25, 41.0], [-8.03, 41.53], [-7.68, 41.68], [-7.53, 42.03], [-7.0, 42.25]]]]}, "2023-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 42.03], [-7.5, 42.25], [-7.25, 42.15], [-7.0, 42.25], [-6.75, 42.15], [-6.68, 42.18], [-6.53, 42.53], [-6.0, 42.75], [-5.75, 42.65], [-5.68, 42.68], [-5.53, 43.03], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-3.97, 43.03], [-3.82, 42.68], [-3.47, 42.53], [-3.32, 42.18], [-2.97, 42.03], [-2.75, 41.5], [-2.97, 40.97], [-3.5, 40.75], [-3.75, 40.85], [-4.0, 40.75], [-4.25, 40.85], [-4.32, 40.82], [-4.47, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.03, 40.47], [-8.25, 41.0], [-8.15, 41.25], [-8.25, 41.5], [-8.03, 42.03]]]]}, "2023-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 42.03], [-7.5, 42.25], [-7.25, 42.15], [-7.0, 42.25], [-6.75, 42.15], [-6.68, 42.18], [-6.53, 42.53], [-6.0, 42.75], [-5.75, 42.65], [-5.68, 42.68], [-5.53, 43.03], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-3.97, 43.03], [-3.82, 42.68], [-3.47, 42.53], [-3.32, 42.18], [-2.97, 42.03], [-2.75, 41.5], [-2.97, 40.97], [-3.5, 40.75], [-3.75, 40.85], [-4.0, 40.75], [-4.25, 40.85], [-4.32, 40.82], [-4.47, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.03, 40.47], [-8.25, 41.0], [-8.15, 41.25], [-8.25, 41.5], [-8.03, 42.03]]]]}, "2023-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 40.97], [-8.25, 41.5], [-8.03, 42.03], [-7.5, 42.25], [-7.25, 42.15], [-7.0, 42.25], [-6.75, 42.15], [-6.68, 42.18], [-6.53, 42.53], [-6.0, 42.75], [-5.75, 42.65], [-5.68, 42.68], [-5.53, 43.03], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-3.97, 43.03], [-3.82, 42.68], [-3.47, 42.53], [-3.25, 42.0], [-3.35, 41.75], [-3.25, 41.5], [-3.47, 40.97], [-4.0, 40.75], [-4.25, 40.85], [-4.5, 40.75], [-4.75, 40.85], [-5.0, 40.75], [-5.25, 40.85], [-5.5, 40.75], [-5.75, 40.85], [-6.0, 40.75], [-6.25, 40.85], [-6.5, 40.75], [-6.75, 40.85], [-7.0, 40.75], [-7.25, 40.85], [-7.5, 40.75], [-8.03, 40.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.19216335150162}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.011484529801815}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.7744867151760673, 0.9208261628271543, 0.10343060242809088, -0.3433788254281467, 0.3240754819073004]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1166626930727261, 0.14098352114206136, -1.0155627694927034, -2.06363059178301, -0.6559186759832869]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.151763648935571, -4.504168958743151, -5.110487239072241, -5.565710928919564, -4.8134833307759965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.373795329099721, -5.173920397542986, -6.105068107078807, -7.19216335150162, -5.7345385950512195]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3642893257383217, -1.4571416256802592, -1.6841134067639523, -1.8278709228836518, -1.5837212173677153]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4897419104214715, -1.7025128784340535, -1.993169070102907, -2.2968527753148327, -1.7692427204703711]}}