{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:33.803011", "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_314.5_67.0"}, "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": 2011100000333}, "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": 67649.90032097818}, "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": 67.0}, "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": 314.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "314.5\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": 64.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.75}, "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": [[[[-48.53, 69.03], [-48.0, 69.25], [-47.75, 69.15], [-47.5, 69.25], [-47.25, 69.15], [-47.0, 69.25], [-46.75, 69.15], [-46.5, 69.25], [-46.25, 69.15], [-46.0, 69.25], [-45.75, 69.15], [-45.5, 69.25], [-45.25, 69.15], [-45.0, 69.25], [-44.75, 69.15], [-44.5, 69.25], [-43.97, 69.03], [-43.75, 68.5], [-43.85, 68.25], [-43.82, 68.18], [-43.47, 68.03], [-43.25, 67.5], [-43.35, 67.25], [-43.32, 67.18], [-42.97, 67.03], [-42.82, 66.68], [-42.47, 66.53], [-42.25, 66.0], [-42.35, 65.75], [-42.25, 65.5], [-42.47, 64.97], [-43.0, 64.75], [-43.25, 64.85], [-43.5, 64.75], [-43.75, 64.85], [-44.0, 64.75], [-44.25, 64.85], [-44.5, 64.75], [-44.75, 64.85], [-44.82, 64.82], [-44.97, 64.47], [-45.5, 64.25], [-46.03, 64.47], [-46.18, 64.82], [-46.53, 64.97], [-46.68, 65.32], [-47.03, 65.47], [-47.18, 65.82], [-47.53, 65.97], [-47.68, 66.32], [-48.03, 66.47], [-48.25, 67.0], [-48.15, 67.25], [-48.18, 67.32], [-48.53, 67.47], [-48.75, 68.0], [-48.65, 68.25], [-48.75, 68.5], [-48.53, 69.03]]]]}, "2011-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, 69.03], [-48.0, 69.25], [-47.75, 69.15], [-47.5, 69.25], [-47.25, 69.15], [-47.0, 69.25], [-46.75, 69.15], [-46.5, 69.25], [-46.25, 69.15], [-46.0, 69.25], [-45.75, 69.15], [-45.5, 69.25], [-45.25, 69.15], [-45.0, 69.25], [-44.75, 69.15], [-44.5, 69.25], [-43.97, 69.03], [-43.75, 68.5], [-43.85, 68.25], [-43.82, 68.18], [-43.47, 68.03], [-43.25, 67.5], [-43.35, 67.25], [-43.32, 67.18], [-42.97, 67.03], [-42.82, 66.68], [-42.47, 66.53], [-42.25, 66.0], [-42.35, 65.75], [-42.25, 65.5], [-42.47, 64.97], [-43.0, 64.75], [-43.25, 64.85], [-43.5, 64.75], [-43.75, 64.85], [-44.0, 64.75], [-44.25, 64.85], [-44.5, 64.75], [-44.75, 64.85], [-44.82, 64.82], [-44.97, 64.47], [-45.5, 64.25], [-46.03, 64.47], [-46.18, 64.82], [-46.53, 64.97], [-46.68, 65.32], [-47.03, 65.47], [-47.18, 65.82], [-47.53, 65.97], [-47.68, 66.32], [-48.03, 66.47], [-48.25, 67.0], [-48.15, 67.25], [-48.18, 67.32], [-48.53, 67.47], [-48.75, 68.0], [-48.65, 68.25], [-48.75, 68.5], [-48.53, 69.03]]]]}, "2011-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, 69.03], [-48.0, 69.25], [-47.75, 69.15], [-47.5, 69.25], [-47.25, 69.15], [-47.0, 69.25], [-46.75, 69.15], [-46.5, 69.25], [-46.25, 69.15], [-46.0, 69.25], [-45.75, 69.15], [-45.5, 69.25], [-45.25, 69.15], [-45.0, 69.25], [-44.75, 69.15], [-44.5, 69.25], [-43.97, 69.03], [-43.75, 68.5], [-43.85, 68.25], [-43.82, 68.18], [-43.47, 68.03], [-43.25, 67.5], [-43.35, 67.25], [-43.32, 67.18], [-42.97, 67.03], [-42.82, 66.68], [-42.47, 66.53], [-42.25, 66.0], [-42.35, 65.75], [-42.25, 65.5], [-42.47, 64.97], [-43.0, 64.75], [-43.25, 64.85], [-43.5, 64.75], [-43.75, 64.85], [-44.0, 64.75], [-44.25, 64.85], [-44.5, 64.75], [-44.75, 64.85], [-44.82, 64.82], [-44.97, 64.47], [-45.5, 64.25], [-46.03, 64.47], [-46.18, 64.82], [-46.53, 64.97], [-46.68, 65.32], [-47.03, 65.47], [-47.18, 65.82], [-47.53, 65.97], [-47.68, 66.32], [-48.03, 66.47], [-48.25, 67.0], [-48.15, 67.25], [-48.18, 67.32], [-48.53, 67.47], [-48.75, 68.0], [-48.65, 68.25], [-48.75, 68.5], [-48.53, 69.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.807269608913487}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.395025806641899}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.00560930138451, -24.180058551491044, -25.4122382924796]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.267363114178153, -26.349283801707458, -28.05697570731391]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.447919299472056, -8.2813514145784, -9.455806705875233]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.935320751396745, -9.545210295629687, -10.807269608913487]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4360498208080767, -1.5837095379788413, -1.7268943324919033]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6941624925865084, -1.7845313405841317, -1.932271196172773]}}