{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:12.626401", "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": "2012-Apr-29_to_2012-May-03_120.0_71.0"}, "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": 2012040001491}, "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": "April 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2012"}, "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": 136450.5799153694}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 71.0}, "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": 120.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 112.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 124.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 67.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.97, 68.97], [117.75, 69.5], [117.97, 70.03], [118.5, 70.25], [118.75, 70.15], [118.82, 70.18], [118.97, 70.53], [119.5, 70.75], [119.75, 70.65], [120.0, 70.75], [120.25, 70.65], [120.5, 70.75], [121.03, 70.53], [121.18, 70.18], [121.25, 70.15], [121.5, 70.25], [121.75, 70.15], [122.0, 70.25], [122.25, 70.15], [122.5, 70.25], [122.75, 70.15], [123.0, 70.25], [123.25, 70.15], [123.5, 70.25], [124.03, 70.03], [124.25, 69.5], [124.15, 69.25], [124.25, 69.0], [124.15, 68.75], [124.25, 68.5], [124.03, 67.97], [123.5, 67.75], [123.25, 67.85], [123.0, 67.75], [122.75, 67.85], [122.5, 67.75], [122.25, 67.85], [122.18, 67.82], [122.15, 67.75], [122.25, 67.5], [122.03, 66.97], [121.5, 66.75], [120.97, 66.97], [120.82, 67.32], [120.75, 67.35], [120.5, 67.25], [119.97, 67.47], [119.82, 67.82], [119.47, 67.97], [119.25, 68.5], [119.35, 68.75], [119.32, 68.82], [119.25, 68.85], [119.0, 68.75], [118.75, 68.85], [118.5, 68.75], [117.97, 68.97]]]]}, "2012-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 73.75], [113.75, 73.65], [114.0, 73.75], [114.25, 73.65], [114.5, 73.75], [114.75, 73.65], [115.0, 73.75], [115.25, 73.65], [115.5, 73.75], [115.75, 73.65], [116.0, 73.75], [116.25, 73.65], [116.5, 73.75], [116.75, 73.65], [117.0, 73.75], [117.25, 73.65], [117.5, 73.75], [117.75, 73.65], [118.0, 73.75], [118.25, 73.65], [118.5, 73.75], [118.75, 73.65], [119.0, 73.75], [119.53, 73.53], [119.68, 73.18], [119.75, 73.15], [120.0, 73.25], [120.25, 73.15], [120.5, 73.25], [120.75, 73.15], [121.0, 73.25], [121.25, 73.15], [121.5, 73.25], [121.75, 73.15], [122.0, 73.25], [122.25, 73.15], [122.5, 73.25], [122.75, 73.15], [123.0, 73.25], [123.25, 73.15], [123.5, 73.25], [124.03, 73.03], [124.25, 72.5], [124.03, 71.97], [123.68, 71.82], [123.65, 71.75], [123.68, 71.68], [123.75, 71.65], [124.0, 71.75], [124.53, 71.53], [124.75, 71.0], [124.53, 70.47], [124.0, 70.25], [123.75, 70.35], [123.68, 70.32], [123.63, 70.2], [124.03, 70.03], [124.25, 69.5], [124.15, 69.25], [124.25, 69.0], [124.15, 68.75], [124.25, 68.5], [124.03, 67.97], [123.5, 67.75], [123.25, 67.85], [123.0, 67.75], [122.75, 67.85], [122.5, 67.75], [122.25, 67.85], [122.18, 67.82], [122.15, 67.75], [122.25, 67.5], [122.03, 66.97], [121.5, 66.75], [120.97, 66.97], [120.82, 67.32], [120.75, 67.35], [120.5, 67.25], [119.97, 67.47], [119.82, 67.82], [119.47, 67.97], [119.32, 68.32], [119.25, 68.35], [119.0, 68.25], [118.75, 68.35], [118.5, 68.25], [118.25, 68.35], [118.0, 68.25], [117.47, 68.47], [117.32, 68.82], [116.97, 68.97], [116.75, 69.5], [116.88, 69.8], [116.75, 69.85], [116.5, 69.75], [115.97, 69.97], [115.75, 70.5], [115.85, 70.75], [115.75, 71.0], [115.97, 71.53], [116.38, 71.7], [116.32, 71.82], [116.25, 71.85], [116.0, 71.75], [115.75, 71.85], [115.5, 71.75], [115.25, 71.85], [115.0, 71.75], [114.75, 71.85], [114.5, 71.75], [114.25, 71.85], [114.0, 71.75], [113.75, 71.85], [113.5, 71.75], [113.25, 71.85], [113.0, 71.75], [112.47, 71.97], [112.25, 72.5], [112.47, 73.03], [112.82, 73.18], [112.97, 73.53], [113.5, 73.75]]]]}, "2012-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 73.75], [113.75, 73.65], [114.0, 73.75], [114.25, 73.65], [114.5, 73.75], [114.75, 73.65], [115.0, 73.75], [115.25, 73.65], [115.5, 73.75], [115.75, 73.65], [116.0, 73.75], [116.25, 73.65], [116.5, 73.75], [116.75, 73.65], [117.0, 73.75], [117.25, 73.65], [117.5, 73.75], [117.75, 73.65], [118.0, 73.75], [118.25, 73.65], [118.5, 73.75], [118.75, 73.65], [119.0, 73.75], [119.53, 73.53], [119.68, 73.18], [119.75, 73.15], [120.0, 73.25], [120.25, 73.15], [120.5, 73.25], [120.75, 73.15], [121.0, 73.25], [121.25, 73.15], [121.5, 73.25], [121.75, 73.15], [122.0, 73.25], [122.25, 73.15], [122.5, 73.25], [122.75, 73.15], [123.0, 73.25], [123.25, 73.15], [123.5, 73.25], [124.03, 73.03], [124.25, 72.5], [124.03, 71.97], [123.68, 71.82], [123.65, 71.75], [123.68, 71.68], [123.75, 71.65], [124.0, 71.75], [124.53, 71.53], [124.75, 71.0], [124.53, 70.47], [124.0, 70.25], [123.75, 70.35], [123.68, 70.32], [123.63, 70.2], [124.03, 70.03], [124.25, 69.5], [124.15, 69.25], [124.25, 69.0], [124.15, 68.75], [124.25, 68.5], [124.03, 67.97], [123.5, 67.75], [123.25, 67.85], [123.0, 67.75], [122.75, 67.85], [122.5, 67.75], [122.25, 67.85], [122.18, 67.82], [122.15, 67.75], [122.25, 67.5], [122.03, 66.97], [121.5, 66.75], [120.97, 66.97], [120.82, 67.32], [120.75, 67.35], [120.5, 67.25], [119.97, 67.47], [119.82, 67.82], [119.47, 67.97], [119.32, 68.32], [119.25, 68.35], [119.0, 68.25], [118.75, 68.35], [118.5, 68.25], [118.25, 68.35], [118.0, 68.25], [117.47, 68.47], [117.32, 68.82], [116.97, 68.97], [116.75, 69.5], [116.88, 69.8], [116.75, 69.85], [116.5, 69.75], [115.97, 69.97], [115.75, 70.5], [115.85, 70.75], [115.82, 70.82], [115.47, 70.97], [115.25, 71.5], [115.38, 71.8], [115.25, 71.85], [115.0, 71.75], [114.75, 71.85], [114.5, 71.75], [114.25, 71.85], [114.0, 71.75], [113.75, 71.85], [113.5, 71.75], [113.25, 71.85], [113.0, 71.75], [112.47, 71.97], [112.25, 72.5], [112.47, 73.03], [112.82, 73.18], [112.97, 73.53], [113.5, 73.75]]]]}, "2012-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 73.75], [113.75, 73.65], [114.0, 73.75], [114.25, 73.65], [114.5, 73.75], [114.75, 73.65], [115.0, 73.75], [115.25, 73.65], [115.5, 73.75], [115.75, 73.65], [116.0, 73.75], [116.25, 73.65], [116.5, 73.75], [116.75, 73.65], [117.0, 73.75], [117.25, 73.65], [117.5, 73.75], [117.75, 73.65], [118.0, 73.75], [118.25, 73.65], [118.5, 73.75], [118.75, 73.65], [119.0, 73.75], [119.53, 73.53], [119.68, 73.18], [119.75, 73.15], [120.0, 73.25], [120.25, 73.15], [120.5, 73.25], [120.75, 73.15], [121.0, 73.25], [121.25, 73.15], [121.5, 73.25], [121.75, 73.15], [122.0, 73.25], [122.25, 73.15], [122.5, 73.25], [122.75, 73.15], [123.0, 73.25], [123.25, 73.15], [123.5, 73.25], [124.03, 73.03], [124.25, 72.5], [124.03, 71.97], [123.68, 71.82], [123.65, 71.75], [123.68, 71.68], [123.75, 71.65], [124.0, 71.75], [124.53, 71.53], [124.75, 71.0], [124.53, 70.47], [124.0, 70.25], [123.75, 70.35], [123.68, 70.32], [123.53, 69.97], [123.0, 69.75], [122.75, 69.85], [122.5, 69.75], [122.25, 69.85], [122.0, 69.75], [121.75, 69.85], [121.68, 69.82], [121.53, 69.47], [121.18, 69.32], [121.15, 69.25], [121.25, 69.0], [121.03, 68.47], [120.5, 68.25], [120.25, 68.35], [120.0, 68.25], [119.75, 68.35], [119.5, 68.25], [119.25, 68.35], [119.0, 68.25], [118.75, 68.35], [118.5, 68.25], [118.25, 68.35], [118.0, 68.25], [117.47, 68.47], [117.32, 68.82], [116.97, 68.97], [116.75, 69.5], [116.88, 69.8], [116.75, 69.85], [116.5, 69.75], [115.97, 69.97], [115.75, 70.5], [115.85, 70.75], [115.82, 70.82], [115.47, 70.97], [115.25, 71.5], [115.38, 71.8], [115.25, 71.85], [115.0, 71.75], [114.75, 71.85], [114.5, 71.75], [114.25, 71.85], [114.0, 71.75], [113.75, 71.85], [113.5, 71.75], [113.25, 71.85], [113.0, 71.75], [112.47, 71.97], [112.25, 72.5], [112.47, 73.03], [112.82, 73.18], [112.97, 73.53], [113.5, 73.75]]]]}, "2012-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.47, 70.97], [115.25, 71.5], [115.47, 72.03], [116.0, 72.25], [116.25, 72.15], [116.5, 72.25], [116.75, 72.15], [117.0, 72.25], [117.25, 72.15], [117.5, 72.25], [117.75, 72.15], [118.0, 72.25], [118.25, 72.15], [118.5, 72.25], [118.75, 72.15], [119.0, 72.25], [119.25, 72.15], [119.5, 72.25], [120.03, 72.03], [120.18, 71.68], [120.53, 71.53], [120.75, 71.0], [120.65, 70.75], [120.75, 70.5], [120.53, 69.97], [120.0, 69.75], [119.75, 69.85], [119.5, 69.75], [118.97, 69.97], [118.82, 70.32], [118.75, 70.35], [118.5, 70.25], [117.97, 70.47], [117.82, 70.82], [117.75, 70.85], [117.5, 70.75], [117.25, 70.85], [117.0, 70.75], [116.75, 70.85], [116.5, 70.75], [116.25, 70.85], [116.0, 70.75], [115.47, 70.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.682778234889497}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.580173228206191}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-12.12231917031204, -14.784798266196617, -15.454989757588692, -14.475777484571495, -13.728673468150816]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-14.222708047165838, -18.264240596214222, -18.66312316753192, -16.33439093834221, -14.424289150242885]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.318787783090314, -6.120816313629095, -7.341743314101939, -6.341009979412058, -6.098557290944618]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.5994546011478405, -7.325339669179925, -8.682778234889497, -7.300932309045891, -6.468270080715627]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2560137911523952, -1.3368311306271785, -1.6613984052062896, -1.4475113330796658, -1.3650425749265571]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.321661565145734, -1.5089607028163736, -1.936032975940415, -1.6073630933171486, -1.4578936148654111]}}