{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:19.334571", "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": "2010-Dec-12_to_2010-Dec-15_270.5_48.5"}, "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": 2010120000648}, "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": "December 12 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 15 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 120718.15929024684}, "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": ["Canada", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America", "N.E.North-America"]}, "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": 48.5}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.65, 47.25], [-94.75, 47.5], [-94.53, 48.03], [-94.18, 48.18], [-94.15, 48.25], [-94.18, 48.32], [-94.53, 48.47], [-94.75, 49.0], [-94.53, 49.53], [-94.0, 49.75], [-93.75, 49.65], [-93.68, 49.68], [-93.65, 49.75], [-93.75, 50.0], [-93.53, 50.53], [-93.0, 50.75], [-92.75, 50.65], [-92.5, 50.75], [-92.25, 50.65], [-92.18, 50.68], [-92.03, 51.03], [-91.5, 51.25], [-91.25, 51.15], [-91.0, 51.25], [-90.75, 51.15], [-90.5, 51.25], [-89.97, 51.03], [-89.82, 50.68], [-89.75, 50.65], [-89.5, 50.75], [-88.97, 50.53], [-88.75, 50.0], [-88.97, 49.47], [-89.32, 49.32], [-89.35, 49.25], [-89.32, 49.18], [-88.97, 49.03], [-88.75, 48.5], [-88.97, 47.97], [-89.32, 47.82], [-89.47, 47.47], [-90.0, 47.25], [-90.25, 47.35], [-90.5, 47.25], [-90.75, 47.35], [-90.82, 47.32], [-90.97, 46.97], [-91.5, 46.75], [-91.75, 46.85], [-91.82, 46.82], [-91.97, 46.47], [-92.5, 46.25], [-92.75, 46.35], [-92.82, 46.32], [-92.85, 46.25], [-92.75, 46.0], [-92.97, 45.47], [-93.5, 45.25], [-94.03, 45.47], [-94.18, 45.82], [-94.53, 45.97], [-94.75, 46.5], [-94.65, 46.75], [-94.75, 47.0], [-94.65, 47.25]]]]}, "2010-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.65, 47.25], [-94.75, 47.5], [-94.53, 48.03], [-94.18, 48.18], [-94.15, 48.25], [-94.18, 48.32], [-94.53, 48.47], [-94.75, 49.0], [-94.53, 49.53], [-94.0, 49.75], [-93.75, 49.65], [-93.68, 49.68], [-93.65, 49.75], [-93.75, 50.0], [-93.53, 50.53], [-93.0, 50.75], [-92.75, 50.65], [-92.5, 50.75], [-92.25, 50.65], [-92.18, 50.68], [-92.03, 51.03], [-91.5, 51.25], [-91.25, 51.15], [-91.0, 51.25], [-90.75, 51.15], [-90.5, 51.25], [-89.97, 51.03], [-89.82, 50.68], [-89.75, 50.65], [-89.5, 50.75], [-88.97, 50.53], [-88.75, 50.0], [-88.97, 49.47], [-89.32, 49.32], [-89.35, 49.25], [-89.32, 49.18], [-88.97, 49.03], [-88.75, 48.5], [-88.97, 47.97], [-89.32, 47.82], [-89.47, 47.47], [-90.0, 47.25], [-90.25, 47.35], [-90.5, 47.25], [-90.75, 47.35], [-90.82, 47.32], [-90.97, 46.97], [-91.5, 46.75], [-91.75, 46.85], [-91.82, 46.82], [-91.85, 46.75], [-91.75, 46.5], [-91.85, 46.25], [-91.75, 46.0], [-91.97, 45.47], [-92.5, 45.25], [-93.0, 45.46], [-93.5, 45.25], [-94.03, 45.47], [-94.18, 45.82], [-94.53, 45.97], [-94.75, 46.5], [-94.65, 46.75], [-94.75, 47.0], [-94.65, 47.25]]]]}, "2010-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.65, 47.25], [-94.75, 47.5], [-94.53, 48.03], [-94.18, 48.18], [-94.15, 48.25], [-94.18, 48.32], [-94.53, 48.47], [-94.75, 49.0], [-94.53, 49.53], [-94.0, 49.75], [-93.75, 49.65], [-93.68, 49.68], [-93.65, 49.75], [-93.75, 50.0], [-93.53, 50.53], [-93.0, 50.75], [-92.75, 50.65], [-92.5, 50.75], [-92.25, 50.65], [-92.18, 50.68], [-92.03, 51.03], [-91.5, 51.25], [-91.25, 51.15], [-91.0, 51.25], [-90.75, 51.15], [-90.5, 51.25], [-89.97, 51.03], [-89.82, 50.68], [-89.75, 50.65], [-89.5, 50.75], [-88.97, 50.53], [-88.75, 50.0], [-88.97, 49.47], [-89.32, 49.32], [-89.35, 49.25], [-89.32, 49.18], [-88.97, 49.03], [-88.75, 48.5], [-88.97, 47.97], [-89.32, 47.82], [-89.47, 47.47], [-90.0, 47.25], [-90.25, 47.35], [-90.5, 47.25], [-90.75, 47.35], [-90.82, 47.32], [-90.97, 46.97], [-91.5, 46.75], [-91.75, 46.85], [-91.82, 46.82], [-91.85, 46.75], [-91.75, 46.5], [-91.85, 46.25], [-91.75, 46.0], [-91.97, 45.47], [-92.5, 45.25], [-93.0, 45.46], [-93.5, 45.25], [-94.03, 45.47], [-94.18, 45.82], [-94.53, 45.97], [-94.75, 46.5], [-94.65, 46.75], [-94.75, 47.0], [-94.65, 47.25]]]]}, "2010-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.5, 47.25], [-91.97, 47.03], [-91.75, 46.5], [-91.85, 46.25], [-91.75, 46.0], [-91.97, 45.47], [-92.5, 45.25], [-93.03, 45.47], [-93.25, 46.0], [-93.15, 46.25], [-93.25, 46.5], [-93.03, 47.03], [-92.5, 47.25]]], [[[-90.03, 47.97], [-90.25, 48.5], [-90.03, 49.03], [-89.5, 49.25], [-88.97, 49.03], [-88.75, 48.5], [-88.97, 47.97], [-89.5, 47.75], [-90.03, 47.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.792886161359519}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -13.545433819198648}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.160748040356253, -24.947810810397243, -23.24012434955148, -18.715789361262722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.11193890783113, -27.85692566950854, -25.88061327174401, -21.511226082764978]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-12.93480163606406, -14.798685966717054, -13.030828858559492, -10.620717290130964]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-14.00740676426085, -15.792886161359519, -14.723249400835527, -11.771733729323529]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6516335544729477, -1.8335483289028633, -1.6607362668754657, -1.4746267535301119]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7760648580290033, -1.9934489585299011, -2.0704645447424315, -1.5141301426213212]}}