{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:08.526144", "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": "2013-Aug-16_to_2013-Aug-20_338.5_66.5"}, "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": 2013080000793}, "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 16 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 20 2013"}, "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": 97123.21145423851}, "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": ["Iceland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "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": ["Greenland 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": 66.5}, "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": 338.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "338.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 335.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 344.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-22.53, 65.97], [-22.75, 66.5], [-22.53, 67.03], [-22.0, 67.25], [-21.75, 67.15], [-21.5, 67.25], [-21.25, 67.15], [-21.0, 67.25], [-20.47, 67.03], [-20.25, 66.5], [-20.47, 65.97], [-21.0, 65.75], [-21.25, 65.85], [-21.5, 65.75], [-21.75, 65.85], [-22.0, 65.75], [-22.53, 65.97]]]]}, "2013-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-25.25, 65.0], [-25.03, 65.53], [-24.68, 65.68], [-24.53, 66.03], [-24.18, 66.18], [-24.15, 66.25], [-24.25, 66.5], [-24.15, 66.75], [-24.25, 67.0], [-24.03, 67.53], [-23.5, 67.75], [-23.25, 67.65], [-23.0, 67.75], [-22.75, 67.65], [-22.5, 67.75], [-22.25, 67.65], [-22.0, 67.75], [-21.75, 67.65], [-21.5, 67.75], [-21.25, 67.65], [-21.0, 67.75], [-20.75, 67.65], [-20.5, 67.75], [-20.25, 67.65], [-20.0, 67.75], [-19.75, 67.65], [-19.68, 67.68], [-19.53, 68.03], [-19.0, 68.25], [-18.75, 68.15], [-18.5, 68.25], [-18.25, 68.15], [-18.0, 68.25], [-17.47, 68.03], [-17.32, 67.68], [-17.25, 67.65], [-17.0, 67.75], [-16.75, 67.65], [-16.5, 67.75], [-16.25, 67.65], [-16.0, 67.75], [-15.47, 67.53], [-15.25, 67.0], [-15.47, 66.47], [-15.82, 66.32], [-15.97, 65.97], [-16.5, 65.75], [-16.75, 65.85], [-17.0, 65.75], [-17.25, 65.85], [-17.5, 65.75], [-17.75, 65.85], [-18.0, 65.75], [-18.25, 65.85], [-18.5, 65.75], [-18.75, 65.85], [-19.0, 65.75], [-19.25, 65.85], [-19.5, 65.75], [-19.75, 65.85], [-20.0, 65.75], [-20.25, 65.85], [-20.32, 65.82], [-20.47, 65.47], [-20.82, 65.32], [-20.97, 64.97], [-21.32, 64.82], [-21.47, 64.47], [-21.82, 64.32], [-21.97, 63.97], [-22.5, 63.75], [-22.75, 63.85], [-23.0, 63.75], [-23.25, 63.85], [-23.5, 63.75], [-23.75, 63.85], [-24.0, 63.75], [-24.53, 63.97], [-24.68, 64.32], [-25.03, 64.47], [-25.25, 65.0]]]]}, "2013-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-25.25, 65.0], [-25.03, 65.53], [-24.68, 65.68], [-24.53, 66.03], [-24.18, 66.18], [-24.15, 66.25], [-24.25, 66.5], [-24.15, 66.75], [-24.25, 67.0], [-24.03, 67.53], [-23.5, 67.75], [-23.25, 67.65], [-23.0, 67.75], [-22.75, 67.65], [-22.5, 67.75], [-22.25, 67.65], [-22.0, 67.75], [-21.75, 67.65], [-21.5, 67.75], [-21.25, 67.65], [-21.0, 67.75], [-20.75, 67.65], [-20.5, 67.75], [-20.25, 67.65], [-20.0, 67.75], [-19.75, 67.65], [-19.68, 67.68], [-19.53, 68.03], [-19.0, 68.25], [-18.75, 68.15], [-18.5, 68.25], [-18.25, 68.15], [-18.0, 68.25], [-17.47, 68.03], [-17.32, 67.68], [-17.25, 67.65], [-17.0, 67.75], [-16.75, 67.65], [-16.5, 67.75], [-16.25, 67.65], [-16.0, 67.75], [-15.47, 67.53], [-15.25, 67.0], [-15.47, 66.47], [-15.82, 66.32], [-15.97, 65.97], [-16.5, 65.75], [-16.75, 65.85], [-17.0, 65.75], [-17.25, 65.85], [-17.5, 65.75], [-17.75, 65.85], [-18.0, 65.75], [-18.25, 65.85], [-18.5, 65.75], [-18.75, 65.85], [-19.0, 65.75], [-19.25, 65.85], [-19.5, 65.75], [-19.75, 65.85], [-20.0, 65.75], [-20.25, 65.85], [-20.32, 65.82], [-20.47, 65.47], [-20.82, 65.32], [-20.87, 65.2], [-20.75, 65.15], [-20.5, 65.25], [-19.97, 65.03], [-19.82, 64.68], [-19.47, 64.53], [-19.25, 64.0], [-19.35, 63.75], [-19.25, 63.5], [-19.47, 62.97], [-20.0, 62.75], [-20.25, 62.85], [-20.32, 62.82], [-20.47, 62.47], [-21.0, 62.25], [-21.25, 62.35], [-21.5, 62.25], [-21.75, 62.35], [-22.0, 62.25], [-22.25, 62.35], [-22.5, 62.25], [-22.75, 62.35], [-23.0, 62.25], [-23.25, 62.35], [-23.5, 62.25], [-24.03, 62.47], [-24.25, 63.0], [-24.03, 63.53], [-23.62, 63.7], [-23.68, 63.82], [-23.75, 63.85], [-24.0, 63.75], [-24.53, 63.97], [-24.68, 64.32], [-25.03, 64.47], [-25.25, 65.0]]]]}, "2013-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-25.25, 65.0], [-25.03, 65.53], [-24.68, 65.68], [-24.53, 66.03], [-24.18, 66.18], [-24.15, 66.25], [-24.25, 66.5], [-24.15, 66.75], [-24.25, 67.0], [-24.03, 67.53], [-23.5, 67.75], [-23.25, 67.65], [-23.0, 67.75], [-22.75, 67.65], [-22.5, 67.75], [-22.25, 67.65], [-22.0, 67.75], [-21.75, 67.65], [-21.5, 67.75], [-21.25, 67.65], [-21.0, 67.75], [-20.75, 67.65], [-20.5, 67.75], [-20.25, 67.65], [-20.0, 67.75], [-19.75, 67.65], [-19.68, 67.68], [-19.53, 68.03], [-19.0, 68.25], [-18.75, 68.15], [-18.5, 68.25], [-18.25, 68.15], [-18.0, 68.25], [-17.47, 68.03], [-17.32, 67.68], [-17.25, 67.65], [-17.0, 67.75], [-16.75, 67.65], [-16.5, 67.75], [-16.25, 67.65], [-16.0, 67.75], [-15.47, 67.53], [-15.25, 67.0], [-15.47, 66.47], [-15.82, 66.32], [-15.97, 65.97], [-16.5, 65.75], [-16.75, 65.85], [-17.0, 65.75], [-17.25, 65.85], [-17.5, 65.75], [-17.75, 65.85], [-18.0, 65.75], [-18.25, 65.85], [-18.5, 65.75], [-18.75, 65.85], [-19.0, 65.75], [-19.25, 65.85], [-19.5, 65.75], [-19.75, 65.85], [-20.0, 65.75], [-20.25, 65.85], [-20.32, 65.82], [-20.47, 65.47], [-20.82, 65.32], [-20.87, 65.2], [-20.75, 65.15], [-20.5, 65.25], [-19.97, 65.03], [-19.82, 64.68], [-19.47, 64.53], [-19.25, 64.0], [-19.35, 63.75], [-19.25, 63.5], [-19.47, 62.97], [-20.0, 62.75], [-20.25, 62.85], [-20.32, 62.82], [-20.47, 62.47], [-21.0, 62.25], [-21.25, 62.35], [-21.5, 62.25], [-21.75, 62.35], [-22.0, 62.25], [-22.25, 62.35], [-22.5, 62.25], [-22.75, 62.35], [-23.0, 62.25], [-23.25, 62.35], [-23.5, 62.25], [-24.03, 62.47], [-24.25, 63.0], [-24.03, 63.53], [-23.62, 63.7], [-23.68, 63.82], [-23.75, 63.85], [-24.0, 63.75], [-24.53, 63.97], [-24.68, 64.32], [-25.03, 64.47], [-25.25, 65.0]]]]}, "2013-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-24.65, 65.25], [-24.75, 65.5], [-24.53, 66.03], [-24.0, 66.25], [-23.75, 66.15], [-23.5, 66.25], [-23.25, 66.15], [-23.0, 66.25], [-22.75, 66.15], [-22.68, 66.18], [-22.53, 66.53], [-22.18, 66.68], [-22.03, 67.03], [-21.5, 67.25], [-21.25, 67.15], [-21.0, 67.25], [-20.75, 67.15], [-20.68, 67.18], [-20.53, 67.53], [-20.0, 67.75], [-19.75, 67.65], [-19.68, 67.68], [-19.53, 68.03], [-19.0, 68.25], [-18.75, 68.15], [-18.5, 68.25], [-18.25, 68.15], [-18.0, 68.25], [-17.47, 68.03], [-17.32, 67.68], [-17.25, 67.65], [-17.0, 67.75], [-16.75, 67.65], [-16.5, 67.75], [-16.25, 67.65], [-16.0, 67.75], [-15.47, 67.53], [-15.25, 67.0], [-15.47, 66.47], [-15.82, 66.32], [-15.97, 65.97], [-16.5, 65.75], [-16.75, 65.85], [-17.0, 65.75], [-17.25, 65.85], [-17.5, 65.75], [-17.75, 65.85], [-18.0, 65.75], [-18.25, 65.85], [-18.5, 65.75], [-18.75, 65.85], [-19.0, 65.75], [-19.25, 65.85], [-19.5, 65.75], [-19.75, 65.85], [-20.0, 65.75], [-20.25, 65.85], [-20.32, 65.82], [-20.47, 65.47], [-20.82, 65.32], [-20.87, 65.2], [-20.75, 65.15], [-20.5, 65.25], [-19.97, 65.03], [-19.82, 64.68], [-19.47, 64.53], [-19.25, 64.0], [-19.35, 63.75], [-19.25, 63.5], [-19.47, 62.97], [-20.0, 62.75], [-20.25, 62.85], [-20.32, 62.82], [-20.47, 62.47], [-21.0, 62.25], [-21.25, 62.35], [-21.5, 62.25], [-21.75, 62.35], [-22.0, 62.25], [-22.25, 62.35], [-22.5, 62.25], [-22.75, 62.35], [-23.0, 62.25], [-23.25, 62.35], [-23.5, 62.25], [-24.03, 62.47], [-24.25, 63.0], [-24.03, 63.53], [-23.62, 63.7], [-23.68, 63.82], [-23.75, 63.85], [-24.0, 63.75], [-24.53, 63.97], [-24.75, 64.5], [-24.65, 64.75], [-24.75, 65.0], [-24.65, 65.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.948560784356914}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4319250375753567}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.790877377525817, 5.724455662364505, 6.8114590941247, 6.635702194557894, 7.19099596096072]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.566451751218608, 3.9421497356321424, 4.273001753056576, 3.6766309372278556, 4.621336151952448]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.039913808159023, -2.79323859972643, -2.286147152949788, -2.4522754232079955, -2.27577690857948]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.187242905474818, -3.948560784356914, -3.196671807070004, -3.938618162845387, -3.7103026889589046]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.338308990478786, -1.7845874373993322, -1.5677515332507856, -1.7305314628714557, -1.66875136517358]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3851126875272615, -2.270908476536713, -1.9681168070580106, -2.157789453146726, -2.230623659641914]}}