{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:56.667735", "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": "2021-Aug-17_to_2021-Aug-19_355.0_44.5"}, "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": 2021080000751}, "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": "August 17 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2021"}, "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": 103326.58394705724}, "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": ["Spain"]}, "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": ["Bay of Biscay"]}, "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": 44.5}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 353.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.18, 45.68], [-6.03, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.18, 46.18], [-5.03, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.0, 46.75], [-2.75, 46.65], [-2.5, 46.75], [-1.97, 46.53], [-1.82, 46.18], [-1.47, 46.03], [-1.25, 45.5], [-1.35, 45.25], [-1.25, 45.0], [-1.35, 44.75], [-1.25, 44.5], [-1.47, 43.97], [-1.82, 43.82], [-1.97, 43.47], [-2.32, 43.32], [-2.35, 43.25], [-2.25, 43.0], [-2.47, 42.47], [-3.0, 42.25], [-3.25, 42.35], [-3.5, 42.25], [-4.03, 42.47], [-4.18, 42.82], [-4.5, 42.96], [-5.0, 42.75], [-5.25, 42.85], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.53, 42.97], [-6.75, 43.5], [-6.62, 43.8], [-7.03, 43.97], [-7.25, 44.5], [-7.03, 45.03], [-6.68, 45.18], [-6.53, 45.53], [-6.18, 45.68]]]]}, "2021-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.18, 45.68], [-6.03, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.18, 46.18], [-5.03, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.0, 46.75], [-2.75, 46.65], [-2.5, 46.75], [-1.97, 46.53], [-1.82, 46.18], [-1.47, 46.03], [-1.25, 45.5], [-1.35, 45.25], [-1.25, 45.0], [-1.35, 44.75], [-1.25, 44.5], [-1.47, 43.97], [-1.82, 43.82], [-1.97, 43.47], [-2.32, 43.32], [-2.35, 43.25], [-2.25, 43.0], [-2.47, 42.47], [-3.0, 42.25], [-3.25, 42.35], [-3.5, 42.25], [-4.03, 42.47], [-4.18, 42.82], [-4.5, 42.96], [-5.0, 42.75], [-5.25, 42.85], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.53, 42.97], [-6.75, 43.5], [-6.62, 43.8], [-7.03, 43.97], [-7.25, 44.5], [-7.03, 45.03], [-6.68, 45.18], [-6.53, 45.53], [-6.18, 45.68]]]]}, "2021-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.18, 45.68], [-6.03, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.18, 46.18], [-5.03, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.0, 46.75], [-2.75, 46.65], [-2.5, 46.75], [-1.97, 46.53], [-1.82, 46.18], [-1.47, 46.03], [-1.25, 45.5], [-1.35, 45.25], [-1.25, 45.0], [-1.35, 44.75], [-1.25, 44.5], [-1.47, 43.97], [-1.82, 43.82], [-1.97, 43.47], [-2.32, 43.32], [-2.35, 43.25], [-2.25, 43.0], [-2.47, 42.47], [-3.0, 42.25], [-3.25, 42.35], [-3.5, 42.25], [-4.03, 42.47], [-4.18, 42.82], [-4.5, 42.96], [-5.0, 42.75], [-5.25, 42.85], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.53, 42.97], [-6.75, 43.5], [-6.62, 43.8], [-7.03, 43.97], [-7.25, 44.5], [-7.03, 45.03], [-6.68, 45.18], [-6.53, 45.53], [-6.18, 45.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.043517873121743}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.045454507510143}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.871825348605682, 17.70446068030924, 17.96015452636027]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.861244312969973, 14.253239720944578, 14.978285196934905]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.015435849277027, -2.186327192385761, -1.9346004808676418]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4120581809684154, -4.043517873121743, -3.342935466827214]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5791620214345512, -1.7293177717542194, -1.5340208363688468]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.874804759141757, -2.033016259828762, -1.7898380872568798]}}