{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:33.809345", "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": "2011-Oct-04_to_2011-Oct-06_317.0_61.5"}, "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": 2011100000332}, "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": "October 04 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 06 2011"}, "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": 65698.38253770549}, "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": ["Greenland"]}, "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": ["North America"]}, "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": 61.5}, "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": 317.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "317.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 311.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 317.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, 62.75], [-48.75, 63.0], [-48.53, 63.53], [-48.18, 63.68], [-48.03, 64.03], [-47.5, 64.25], [-47.25, 64.15], [-47.0, 64.25], [-46.75, 64.15], [-46.5, 64.25], [-46.25, 64.15], [-46.18, 64.18], [-46.03, 64.53], [-45.5, 64.75], [-45.25, 64.65], [-45.0, 64.75], [-44.47, 64.53], [-44.25, 64.0], [-44.35, 63.75], [-44.3, 63.62], [-44.0, 63.75], [-43.75, 63.65], [-43.5, 63.75], [-42.97, 63.53], [-42.75, 63.0], [-42.85, 62.75], [-42.82, 62.68], [-42.47, 62.53], [-42.25, 62.0], [-42.35, 61.75], [-42.25, 61.5], [-42.47, 60.97], [-43.0, 60.75], [-43.25, 60.85], [-43.5, 60.75], [-43.75, 60.85], [-44.0, 60.75], [-44.25, 60.85], [-44.5, 60.75], [-44.75, 60.85], [-45.0, 60.75], [-45.25, 60.85], [-45.5, 60.75], [-45.75, 60.85], [-46.0, 60.75], [-46.25, 60.85], [-46.5, 60.75], [-46.75, 60.85], [-47.0, 60.75], [-47.53, 60.97], [-47.68, 61.32], [-47.75, 61.35], [-48.0, 61.25], [-48.53, 61.47], [-48.75, 62.0], [-48.65, 62.25], [-48.75, 62.5], [-48.65, 62.75]]]]}, "2011-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, 62.75], [-48.75, 63.0], [-48.53, 63.53], [-48.18, 63.68], [-48.03, 64.03], [-47.5, 64.25], [-47.25, 64.15], [-47.0, 64.25], [-46.75, 64.15], [-46.5, 64.25], [-46.25, 64.15], [-46.18, 64.18], [-46.03, 64.53], [-45.5, 64.75], [-45.25, 64.65], [-45.0, 64.75], [-44.47, 64.53], [-44.25, 64.0], [-44.35, 63.75], [-44.3, 63.62], [-44.0, 63.75], [-43.75, 63.65], [-43.5, 63.75], [-42.97, 63.53], [-42.75, 63.0], [-42.85, 62.75], [-42.82, 62.68], [-42.47, 62.53], [-42.25, 62.0], [-42.35, 61.75], [-42.25, 61.5], [-42.47, 60.97], [-43.0, 60.75], [-43.25, 60.85], [-43.5, 60.75], [-43.75, 60.85], [-44.0, 60.75], [-44.25, 60.85], [-44.5, 60.75], [-44.75, 60.85], [-45.0, 60.75], [-45.25, 60.85], [-45.5, 60.75], [-45.75, 60.85], [-46.0, 60.75], [-46.25, 60.85], [-46.5, 60.75], [-46.75, 60.85], [-47.0, 60.75], [-47.53, 60.97], [-47.68, 61.32], [-47.75, 61.35], [-48.0, 61.25], [-48.53, 61.47], [-48.75, 62.0], [-48.65, 62.25], [-48.75, 62.5], [-48.65, 62.75]]]]}, "2011-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, 62.75], [-48.75, 63.0], [-48.53, 63.53], [-48.18, 63.68], [-48.03, 64.03], [-47.5, 64.25], [-47.25, 64.15], [-47.0, 64.25], [-46.75, 64.15], [-46.5, 64.25], [-46.25, 64.15], [-46.18, 64.18], [-46.03, 64.53], [-45.5, 64.75], [-45.25, 64.65], [-45.0, 64.75], [-44.47, 64.53], [-44.25, 64.0], [-44.35, 63.75], [-44.3, 63.62], [-44.0, 63.75], [-43.75, 63.65], [-43.5, 63.75], [-42.97, 63.53], [-42.75, 63.0], [-42.85, 62.75], [-42.82, 62.68], [-42.47, 62.53], [-42.25, 62.0], [-42.35, 61.75], [-42.25, 61.5], [-42.47, 60.97], [-43.0, 60.75], [-43.25, 60.85], [-43.5, 60.75], [-43.75, 60.85], [-44.0, 60.75], [-44.25, 60.85], [-44.5, 60.75], [-44.75, 60.85], [-45.0, 60.75], [-45.25, 60.85], [-45.5, 60.75], [-45.75, 60.85], [-46.0, 60.75], [-46.25, 60.85], [-46.5, 60.75], [-46.75, 60.85], [-47.0, 60.75], [-47.53, 60.97], [-47.68, 61.32], [-47.75, 61.35], [-48.0, 61.25], [-48.53, 61.47], [-48.75, 62.0], [-48.65, 62.25], [-48.75, 62.5], [-48.65, 62.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.716804271792341}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.980348411734347}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.55909920199764, -20.010535965445655, -19.556257903938217]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.74675385640944, -26.671193372239685, -27.271530970859885]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.321586320091745, -7.525806910824576, -7.093652004286717]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.969564185073267, -9.716804271792341, -9.450084661412177]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.46670966827878, -1.7287182275575668, -1.5438289824226616]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6799595290829865, -2.414853917752293, -1.8043809435461449]}}