{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:05.421163", "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-Feb-09_to_2010-Feb-12_269.0_35.5"}, "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": 2010020000326}, "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": "February 09 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 12 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": 62956.76653102981}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.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": 35.5}, "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": 269.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 266.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 36.53], [-93.68, 36.68], [-93.53, 37.03], [-93.0, 37.25], [-92.47, 37.03], [-92.32, 36.68], [-92.25, 36.65], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-91.25, 36.65], [-91.0, 36.75], [-90.75, 36.65], [-90.5, 36.75], [-89.97, 36.53], [-89.82, 36.18], [-89.47, 36.03], [-89.25, 35.5], [-89.35, 35.25], [-89.25, 35.0], [-89.47, 34.47], [-90.0, 34.25], [-90.25, 34.35], [-90.5, 34.25], [-90.75, 34.35], [-91.0, 34.25], [-91.25, 34.35], [-91.5, 34.25], [-91.75, 34.35], [-91.82, 34.32], [-91.97, 33.97], [-92.5, 33.75], [-92.75, 33.85], [-93.0, 33.75], [-93.53, 33.97], [-93.68, 34.32], [-94.03, 34.47], [-94.25, 35.0], [-94.04, 35.5], [-94.25, 36.0], [-94.03, 36.53]]]]}, "2010-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 36.53], [-93.68, 36.68], [-93.53, 37.03], [-93.0, 37.25], [-92.47, 37.03], [-92.32, 36.68], [-92.25, 36.65], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-91.25, 36.65], [-91.0, 36.75], [-90.75, 36.65], [-90.5, 36.75], [-89.97, 36.53], [-89.82, 36.18], [-89.47, 36.03], [-89.25, 35.5], [-89.35, 35.25], [-89.25, 35.0], [-89.47, 34.47], [-90.0, 34.25], [-90.25, 34.35], [-90.5, 34.25], [-90.75, 34.35], [-91.0, 34.25], [-91.25, 34.35], [-91.5, 34.25], [-91.75, 34.35], [-91.82, 34.32], [-91.97, 33.97], [-92.5, 33.75], [-92.75, 33.85], [-93.0, 33.75], [-93.53, 33.97], [-93.68, 34.32], [-94.03, 34.47], [-94.25, 35.0], [-94.04, 35.5], [-94.25, 36.0], [-94.03, 36.53]]]]}, "2010-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 36.53], [-93.68, 36.68], [-93.53, 37.03], [-93.0, 37.25], [-92.47, 37.03], [-92.32, 36.68], [-92.25, 36.65], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-91.25, 36.65], [-91.0, 36.75], [-90.75, 36.65], [-90.5, 36.75], [-89.97, 36.53], [-89.82, 36.18], [-89.47, 36.03], [-89.25, 35.5], [-89.35, 35.25], [-89.25, 35.0], [-89.47, 34.47], [-90.0, 34.25], [-90.25, 34.35], [-90.5, 34.25], [-90.75, 34.35], [-91.0, 34.25], [-91.25, 34.35], [-91.5, 34.25], [-91.75, 34.35], [-91.82, 34.32], [-91.97, 33.97], [-92.5, 33.75], [-92.75, 33.85], [-93.0, 33.75], [-93.53, 33.97], [-93.68, 34.32], [-94.03, 34.47], [-94.25, 35.0], [-94.04, 35.5], [-94.25, 36.0], [-94.03, 36.53]]]]}, "2010-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.0, 36.25], [-90.47, 36.03], [-90.25, 35.5], [-90.47, 34.97], [-91.0, 34.75], [-91.53, 34.97], [-91.75, 35.5], [-91.53, 36.03], [-91.0, 36.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.544677108796066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.573738758255226}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.2047151603436532, -3.702896676719263, -4.001402774398002, -1.3098392823978315]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.613047032225211, -5.46968556939936, -7.081354856385985, -1.3098392823978315]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.53853641731376, -8.96901932065672, -9.27717901838346, -6.98577671854855]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.93456049408195, -10.466788443269024, -12.544677108796066, -6.98577671854855]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3246295899014724, -1.608838169802852, -1.723665055649712, -1.2586626785756767]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5794903567571994, -1.9507637358783807, -2.208380201105825, -1.2586626785756767]}}