{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:34.861977", "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-Feb-06_to_2012-Feb-12_88.5_41.0"}, "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": 2012020000473}, "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 06 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 12 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 137630.20642099454}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia"]}, "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": 41.0}, "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": 88.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "88.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 76.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 89.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.0, 42.25], [89.53, 42.03], [89.75, 41.5], [89.53, 40.97], [89.0, 40.75], [88.47, 40.97], [88.25, 41.5], [88.47, 42.03], [89.0, 42.25]]]]}, "2012-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.47, 42.53], [88.0, 42.75], [88.25, 42.65], [88.5, 42.75], [89.03, 42.53], [89.18, 42.18], [89.53, 42.03], [89.75, 41.5], [89.53, 40.97], [89.18, 40.82], [89.03, 40.47], [88.5, 40.25], [88.0, 40.46], [87.5, 40.25], [86.97, 40.47], [86.75, 41.0], [86.97, 41.53], [87.38, 41.7], [87.25, 42.0], [87.47, 42.53]]]]}, "2012-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 40.53], [77.0, 40.75], [77.25, 40.65], [77.32, 40.68], [77.47, 41.03], [78.0, 41.25], [78.25, 41.15], [78.32, 41.18], [78.47, 41.53], [78.82, 41.68], [78.97, 42.03], [79.5, 42.25], [80.03, 42.03], [80.25, 41.5], [80.13, 41.2], [80.25, 41.15], [80.32, 41.18], [80.47, 41.53], [80.82, 41.68], [80.97, 42.03], [81.5, 42.25], [81.75, 42.15], [82.0, 42.25], [82.25, 42.15], [82.5, 42.25], [83.0, 42.04], [83.5, 42.25], [84.0, 42.04], [84.5, 42.25], [84.75, 42.15], [85.0, 42.25], [85.3, 42.13], [85.47, 42.53], [86.0, 42.75], [86.25, 42.65], [86.5, 42.75], [86.75, 42.65], [87.0, 42.75], [87.25, 42.65], [87.5, 42.75], [87.75, 42.65], [88.0, 42.75], [88.25, 42.65], [88.5, 42.75], [88.75, 42.65], [89.0, 42.75], [89.53, 42.53], [89.75, 42.0], [89.65, 41.75], [89.75, 41.5], [89.65, 41.25], [89.75, 41.0], [89.53, 40.47], [89.0, 40.25], [88.75, 40.35], [88.5, 40.25], [88.25, 40.35], [88.0, 40.25], [87.75, 40.35], [87.5, 40.25], [87.25, 40.35], [87.0, 40.25], [86.47, 40.47], [86.25, 41.0], [86.38, 41.3], [86.25, 41.35], [86.0, 41.25], [85.7, 41.38], [85.53, 40.97], [85.0, 40.75], [84.75, 40.85], [84.5, 40.75], [84.0, 40.96], [83.5, 40.75], [83.0, 40.96], [82.68, 40.82], [82.53, 40.47], [82.0, 40.25], [81.75, 40.35], [81.68, 40.32], [81.65, 40.25], [81.75, 40.0], [81.53, 39.47], [81.0, 39.25], [80.75, 39.35], [80.5, 39.25], [80.25, 39.35], [80.18, 39.32], [80.03, 38.97], [79.5, 38.75], [78.97, 38.97], [78.82, 39.32], [78.47, 39.47], [78.32, 39.82], [78.25, 39.85], [78.18, 39.82], [78.03, 39.47], [77.68, 39.32], [77.53, 38.97], [77.0, 38.75], [76.47, 38.97], [76.25, 39.5], [76.35, 39.75], [76.25, 40.0], [76.47, 40.53]]]]}, "2012-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 40.53], [77.0, 40.75], [77.25, 40.65], [77.32, 40.68], [77.47, 41.03], [78.0, 41.25], [78.25, 41.15], [78.32, 41.18], [78.47, 41.53], [78.82, 41.68], [78.97, 42.03], [79.5, 42.25], [80.03, 42.03], [80.25, 41.5], [80.15, 41.25], [80.18, 41.18], [80.25, 41.15], [80.32, 41.18], [80.47, 41.53], [80.82, 41.68], [80.97, 42.03], [81.5, 42.25], [81.75, 42.15], [82.0, 42.25], [82.25, 42.15], [82.5, 42.25], [82.75, 42.15], [83.0, 42.25], [83.25, 42.15], [83.5, 42.25], [83.75, 42.15], [84.0, 42.25], [84.25, 42.15], [84.5, 42.25], [84.75, 42.15], [85.0, 42.25], [85.3, 42.13], [85.47, 42.53], [86.0, 42.75], [86.25, 42.65], [86.5, 42.75], [86.75, 42.65], [87.0, 42.75], [87.25, 42.65], [87.5, 42.75], [87.75, 42.65], [88.0, 42.75], [88.25, 42.65], [88.5, 42.75], [88.75, 42.65], [89.0, 42.75], [89.53, 42.53], [89.75, 42.0], [89.65, 41.75], [89.75, 41.5], [89.65, 41.25], [89.75, 41.0], [89.53, 40.47], [89.0, 40.25], [88.75, 40.35], [88.5, 40.25], [88.25, 40.35], [88.0, 40.25], [87.75, 40.35], [87.5, 40.25], [87.25, 40.35], [87.0, 40.25], [86.75, 40.35], [86.5, 40.25], [85.97, 40.47], [85.75, 41.0], [85.85, 41.25], [85.82, 41.32], [85.7, 41.38], [85.53, 40.97], [85.0, 40.75], [84.75, 40.85], [84.68, 40.82], [84.53, 40.47], [84.0, 40.25], [83.75, 40.35], [83.5, 40.25], [83.25, 40.35], [83.18, 40.32], [83.03, 39.97], [82.5, 39.75], [82.25, 39.85], [82.0, 39.75], [81.75, 39.85], [81.68, 39.82], [81.53, 39.47], [81.0, 39.25], [80.75, 39.35], [80.5, 39.25], [80.25, 39.35], [80.18, 39.32], [80.03, 38.97], [79.5, 38.75], [78.97, 38.97], [78.82, 39.32], [78.47, 39.47], [78.32, 39.82], [78.25, 39.85], [78.18, 39.82], [78.03, 39.47], [77.68, 39.32], [77.53, 38.97], [77.0, 38.75], [76.47, 38.97], [76.25, 39.5], [76.35, 39.75], [76.25, 40.0], [76.47, 40.53]]]]}, "2012-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 40.53], [77.0, 40.75], [77.25, 40.65], [77.32, 40.68], [77.47, 41.03], [78.0, 41.25], [78.25, 41.15], [78.32, 41.18], [78.47, 41.53], [78.82, 41.68], [78.97, 42.03], [79.5, 42.25], [80.03, 42.03], [80.25, 41.5], [80.15, 41.25], [80.18, 41.18], [80.25, 41.15], [80.32, 41.18], [80.47, 41.53], [80.82, 41.68], [80.97, 42.03], [81.5, 42.25], [81.75, 42.15], [82.0, 42.25], [82.25, 42.15], [82.5, 42.25], [82.75, 42.15], [83.0, 42.25], [83.25, 42.15], [83.5, 42.25], [83.75, 42.15], [84.0, 42.25], [84.25, 42.15], [84.5, 42.25], [84.75, 42.15], [85.0, 42.25], [85.3, 42.13], [85.47, 42.53], [86.0, 42.75], [86.25, 42.65], [86.5, 42.75], [86.75, 42.65], [87.0, 42.75], [87.25, 42.65], [87.5, 42.75], [87.75, 42.65], [88.0, 42.75], [88.25, 42.65], [88.5, 42.75], [88.75, 42.65], [89.0, 42.75], [89.53, 42.53], [89.75, 42.0], [89.65, 41.75], [89.75, 41.5], [89.65, 41.25], [89.75, 41.0], [89.53, 40.47], [89.0, 40.25], [88.75, 40.35], [88.5, 40.25], [88.25, 40.35], [88.0, 40.25], [87.75, 40.35], [87.5, 40.25], [87.25, 40.35], [87.0, 40.25], [86.75, 40.35], [86.5, 40.25], [86.25, 40.35], [86.0, 40.25], [85.75, 40.35], [85.5, 40.25], [84.97, 40.47], [84.82, 40.82], [84.75, 40.85], [84.68, 40.82], [84.53, 40.47], [84.0, 40.25], [83.75, 40.35], [83.5, 40.25], [83.25, 40.35], [83.18, 40.32], [83.03, 39.97], [82.5, 39.75], [82.25, 39.85], [82.0, 39.75], [81.75, 39.85], [81.68, 39.82], [81.53, 39.47], [81.0, 39.25], [80.75, 39.35], [80.5, 39.25], [80.25, 39.35], [80.18, 39.32], [80.03, 38.97], [79.5, 38.75], [78.97, 38.97], [78.82, 39.32], [78.47, 39.47], [78.32, 39.82], [78.25, 39.85], [78.18, 39.82], [78.03, 39.47], [77.68, 39.32], [77.53, 38.97], [77.0, 38.75], [76.47, 38.97], [76.25, 39.5], [76.35, 39.75], [76.25, 40.0], [76.47, 40.53]]]]}, "2012-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 39.47], [76.25, 40.0], [76.47, 40.53], [77.0, 40.75], [77.53, 40.53], [77.75, 40.0], [77.53, 39.47], [77.0, 39.25], [76.47, 39.47]]], [[[78.97, 42.03], [79.5, 42.25], [80.03, 42.03], [80.25, 41.5], [80.15, 41.25], [80.18, 41.18], [80.25, 41.15], [80.32, 41.18], [80.47, 41.53], [80.82, 41.68], [80.97, 42.03], [81.5, 42.25], [81.75, 42.15], [82.0, 42.25], [82.25, 42.15], [82.5, 42.25], [82.75, 42.15], [83.0, 42.25], [83.25, 42.15], [83.5, 42.25], [83.75, 42.15], [84.0, 42.25], [84.25, 42.15], [84.5, 42.25], [84.75, 42.15], [85.0, 42.25], [85.3, 42.13], [85.47, 42.53], [86.0, 42.75], [86.25, 42.65], [86.5, 42.75], [86.75, 42.65], [87.0, 42.75], [87.25, 42.65], [87.5, 42.75], [87.75, 42.65], [88.0, 42.75], [88.25, 42.65], [88.5, 42.75], [89.03, 42.53], [89.18, 42.18], [89.53, 42.03], [89.75, 41.5], [89.65, 41.25], [89.75, 41.0], [89.53, 40.47], [89.0, 40.25], [88.75, 40.35], [88.5, 40.25], [88.25, 40.35], [88.0, 40.25], [87.75, 40.35], [87.5, 40.25], [87.25, 40.35], [87.0, 40.25], [86.75, 40.35], [86.5, 40.25], [86.25, 40.35], [86.0, 40.25], [85.75, 40.35], [85.5, 40.25], [84.97, 40.47], [84.82, 40.82], [84.75, 40.85], [84.68, 40.82], [84.53, 40.47], [84.0, 40.25], [83.75, 40.35], [83.5, 40.25], [83.25, 40.35], [83.18, 40.32], [83.03, 39.97], [82.5, 39.75], [82.25, 39.85], [82.0, 39.75], [81.75, 39.85], [81.68, 39.82], [81.53, 39.47], [81.0, 39.25], [80.75, 39.35], [80.5, 39.25], [79.97, 39.47], [79.82, 39.82], [79.75, 39.85], [79.5, 39.75], [79.25, 39.85], [79.0, 39.75], [78.75, 39.85], [78.5, 39.75], [77.97, 39.97], [77.75, 40.5], [77.97, 41.03], [78.32, 41.18], [78.47, 41.53], [78.82, 41.68], [78.97, 42.03]]]]}, "2012-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.47, 39.47], [76.25, 40.0], [76.47, 40.53], [77.0, 40.75], [77.53, 40.53], [77.75, 40.0], [77.53, 39.47], [77.0, 39.25], [76.47, 39.47]]], [[[79.5, 42.25], [80.03, 42.03], [80.25, 41.5], [80.15, 41.25], [80.25, 41.0], [80.03, 40.47], [79.68, 40.32], [79.53, 39.97], [79.0, 39.75], [78.75, 39.85], [78.5, 39.75], [77.97, 39.97], [77.75, 40.5], [77.97, 41.03], [78.32, 41.18], [78.47, 41.53], [78.82, 41.68], [78.97, 42.03], [79.5, 42.25]]], [[[86.0, 42.75], [86.25, 42.65], [86.5, 42.75], [86.75, 42.65], [87.0, 42.75], [87.25, 42.65], [87.5, 42.75], [88.03, 42.53], [88.25, 42.0], [88.13, 41.7], [88.25, 41.65], [88.5, 41.75], [88.75, 41.65], [89.0, 41.75], [89.53, 41.53], [89.75, 41.0], [89.53, 40.47], [89.0, 40.25], [88.75, 40.35], [88.5, 40.25], [88.25, 40.35], [88.0, 40.25], [87.75, 40.35], [87.5, 40.25], [87.25, 40.35], [87.0, 40.25], [86.75, 40.35], [86.5, 40.25], [86.25, 40.35], [86.0, 40.25], [85.75, 40.35], [85.5, 40.25], [84.97, 40.47], [84.75, 41.0], [84.97, 41.53], [85.32, 41.68], [85.35, 41.75], [85.25, 42.0], [85.47, 42.53], [86.0, 42.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.323996221410994}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.736542039196553}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.395109580351516, -9.432187933749617, -8.15092876903401, -8.133329452778355, -7.819581886165452, -7.06236296120295, -7.602870382738786]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.395109580351516, -12.302647880546942, -14.008567876455174, -14.056371563232744, -13.558646951179583, -13.126175030030709, -12.957742756233586]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.092307894455587, -5.062024093851686, -4.531929952544396, -4.933515563874308, -4.971860585825571, -4.44264564199388, -4.54023518498183]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.092307894455587, -7.311396439527073, -7.153904873296142, -8.323996221410994, -7.5129377614696295, -6.598619773411201, -5.905132527540218]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6483762709442007, -1.6200766992206541, -1.5055001017094358, -1.6434544400267659, -1.6536596093730511, -1.480226475475897, -1.4207217454557053]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6483762709442007, -2.3404623879706707, -2.276129805115665, -2.590629428693043, -2.3425689315862734, -2.0675619852449514, -1.6978713990500585]}}