{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:12.376684", "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": "2012-Apr-27_to_2012-Apr-29_352.5_52.0"}, "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": 2012040001394}, "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": "April 27 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 29 2012"}, "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": 65035.50465801023}, "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": ["Ireland", "United Kingdom"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": ["Celtic Sea", "North Atlantic Ocean"]}, "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": 52.0}, "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": 352.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.54, 53.0], [-10.75, 53.5], [-10.65, 53.75], [-10.75, 54.0], [-10.53, 54.53], [-10.0, 54.75], [-9.75, 54.65], [-9.5, 54.75], [-9.25, 54.65], [-9.0, 54.75], [-8.75, 54.65], [-8.68, 54.68], [-8.53, 55.03], [-8.0, 55.25], [-7.47, 55.03], [-7.32, 54.68], [-7.2, 54.62], [-7.03, 55.03], [-6.5, 55.25], [-6.25, 55.15], [-6.0, 55.25], [-5.47, 55.03], [-5.25, 54.5], [-5.47, 53.97], [-5.82, 53.82], [-5.85, 53.75], [-5.75, 53.5], [-5.85, 53.25], [-5.75, 53.0], [-5.85, 52.75], [-5.75, 52.5], [-5.97, 51.97], [-6.32, 51.82], [-6.47, 51.47], [-7.0, 51.25], [-7.25, 51.35], [-7.32, 51.32], [-7.35, 51.25], [-7.25, 51.0], [-7.47, 50.47], [-8.0, 50.25], [-8.53, 50.47], [-8.68, 50.82], [-8.75, 50.85], [-9.0, 50.75], [-9.53, 50.97], [-9.7, 51.38], [-10.0, 51.25], [-10.53, 51.47], [-10.75, 52.0], [-10.65, 52.25], [-10.75, 52.5], [-10.54, 53.0]], [[-8.62, 52.3], [-8.75, 52.35], [-8.82, 52.32], [-8.87, 52.2], [-8.75, 52.15], [-8.68, 52.18], [-8.62, 52.3]]]]}, "2012-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.54, 53.0], [-10.75, 53.5], [-10.65, 53.75], [-10.75, 54.0], [-10.53, 54.53], [-10.0, 54.75], [-9.75, 54.65], [-9.5, 54.75], [-9.25, 54.65], [-9.0, 54.75], [-8.75, 54.65], [-8.68, 54.68], [-8.53, 55.03], [-8.0, 55.25], [-7.47, 55.03], [-7.32, 54.68], [-7.2, 54.62], [-7.03, 55.03], [-6.5, 55.25], [-6.25, 55.15], [-6.0, 55.25], [-5.47, 55.03], [-5.25, 54.5], [-5.47, 53.97], [-5.82, 53.82], [-5.85, 53.75], [-5.75, 53.5], [-5.85, 53.25], [-5.75, 53.0], [-5.85, 52.75], [-5.75, 52.5], [-5.97, 51.97], [-6.32, 51.82], [-6.47, 51.47], [-7.0, 51.25], [-7.25, 51.35], [-7.32, 51.32], [-7.35, 51.25], [-7.25, 51.0], [-7.47, 50.47], [-8.0, 50.25], [-8.53, 50.47], [-8.68, 50.82], [-8.75, 50.85], [-9.0, 50.75], [-9.53, 50.97], [-9.7, 51.38], [-10.0, 51.25], [-10.53, 51.47], [-10.75, 52.0], [-10.65, 52.25], [-10.75, 52.5], [-10.54, 53.0]], [[-8.62, 52.3], [-8.75, 52.35], [-8.82, 52.32], [-8.87, 52.2], [-8.75, 52.15], [-8.68, 52.18], [-8.62, 52.3]]]]}, "2012-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.54, 53.0], [-10.75, 53.5], [-10.65, 53.75], [-10.75, 54.0], [-10.53, 54.53], [-10.0, 54.75], [-9.75, 54.65], [-9.5, 54.75], [-9.25, 54.65], [-9.0, 54.75], [-8.75, 54.65], [-8.68, 54.68], [-8.53, 55.03], [-8.0, 55.25], [-7.47, 55.03], [-7.32, 54.68], [-7.2, 54.62], [-7.03, 55.03], [-6.5, 55.25], [-6.25, 55.15], [-6.0, 55.25], [-5.47, 55.03], [-5.25, 54.5], [-5.47, 53.97], [-5.82, 53.82], [-5.85, 53.75], [-5.75, 53.5], [-5.85, 53.25], [-5.75, 53.0], [-5.85, 52.75], [-5.75, 52.5], [-5.97, 51.97], [-6.32, 51.82], [-6.47, 51.47], [-7.0, 51.25], [-7.25, 51.35], [-7.32, 51.32], [-7.35, 51.25], [-7.25, 51.0], [-7.47, 50.47], [-8.0, 50.25], [-8.53, 50.47], [-8.68, 50.82], [-8.75, 50.85], [-9.0, 50.75], [-9.53, 50.97], [-9.7, 51.38], [-10.0, 51.25], [-10.53, 51.47], [-10.75, 52.0], [-10.65, 52.25], [-10.75, 52.5], [-10.54, 53.0]], [[-8.62, 52.3], [-8.75, 52.35], [-8.82, 52.32], [-8.87, 52.2], [-8.75, 52.15], [-8.68, 52.18], [-8.62, 52.3]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.287470538159994}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8321637319811046}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.834429989974069, 6.807415814351316, 6.4563244972062535]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.820069855828592, 5.826274792526249, 4.870865881006296]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5915373484246063, -2.7142951287473727, -3.190658718771335]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1248433002136267, -3.4809798256032423, -4.287470538159994]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.396683972277636, -1.4063505570169514, -1.7138821126077333]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6277646625833129, -1.5778165529658486, -2.5620764628125507]}}