{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:10.392443", "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-Aug-27_to_2011-Aug-30_88.0_44.5"}, "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": 2011080001421}, "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": "August 27 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 30 2011"}, "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": 89877.970647074}, "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", "W.Siberia"]}, "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": 44.5}, "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": 88.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "88.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 82.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 89.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 45.53], [83.0, 45.75], [83.25, 45.65], [83.32, 45.68], [83.47, 46.03], [84.0, 46.25], [84.25, 46.15], [84.5, 46.25], [84.75, 46.15], [85.0, 46.25], [85.25, 46.15], [85.5, 46.25], [85.75, 46.15], [86.0, 46.25], [86.25, 46.15], [86.5, 46.25], [86.75, 46.15], [87.0, 46.25], [87.25, 46.15], [87.5, 46.25], [87.75, 46.15], [88.0, 46.25], [88.25, 46.15], [88.5, 46.25], [89.03, 46.03], [89.18, 45.68], [89.25, 45.65], [89.5, 45.75], [90.03, 45.53], [90.25, 45.0], [90.15, 44.75], [90.25, 44.5], [90.03, 43.97], [89.5, 43.75], [89.25, 43.85], [89.0, 43.75], [88.75, 43.85], [88.68, 43.82], [88.53, 43.47], [88.0, 43.25], [87.75, 43.35], [87.5, 43.25], [87.25, 43.35], [87.0, 43.25], [86.75, 43.35], [86.5, 43.25], [86.25, 43.35], [86.0, 43.25], [85.47, 43.47], [85.32, 43.82], [85.25, 43.85], [85.0, 43.75], [84.75, 43.85], [84.5, 43.75], [84.25, 43.85], [84.0, 43.75], [83.75, 43.85], [83.5, 43.75], [83.25, 43.85], [83.0, 43.75], [82.47, 43.97], [82.25, 44.5], [82.35, 44.75], [82.25, 45.0], [82.47, 45.53]]]]}, "2011-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 45.53], [83.0, 45.75], [83.25, 45.65], [83.32, 45.68], [83.47, 46.03], [84.0, 46.25], [84.25, 46.15], [84.5, 46.25], [84.75, 46.15], [85.0, 46.25], [85.25, 46.15], [85.5, 46.25], [85.75, 46.15], [86.0, 46.25], [86.25, 46.15], [86.5, 46.25], [86.75, 46.15], [87.0, 46.25], [87.25, 46.15], [87.5, 46.25], [87.75, 46.15], [88.0, 46.25], [88.25, 46.15], [88.5, 46.25], [89.03, 46.03], [89.18, 45.68], [89.25, 45.65], [89.5, 45.75], [90.03, 45.53], [90.25, 45.0], [90.15, 44.75], [90.25, 44.5], [90.03, 43.97], [89.5, 43.75], [89.25, 43.85], [89.0, 43.75], [88.75, 43.85], [88.68, 43.82], [88.53, 43.47], [88.0, 43.25], [87.75, 43.35], [87.5, 43.25], [87.25, 43.35], [87.0, 43.25], [86.75, 43.35], [86.5, 43.25], [86.25, 43.35], [86.0, 43.25], [85.47, 43.47], [85.32, 43.82], [85.25, 43.85], [85.0, 43.75], [84.75, 43.85], [84.5, 43.75], [84.25, 43.85], [84.0, 43.75], [83.75, 43.85], [83.5, 43.75], [83.25, 43.85], [83.0, 43.75], [82.47, 43.97], [82.25, 44.5], [82.35, 44.75], [82.25, 45.0], [82.47, 45.53]]]]}, "2011-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 45.53], [83.0, 45.75], [83.25, 45.65], [83.32, 45.68], [83.47, 46.03], [84.0, 46.25], [84.25, 46.15], [84.5, 46.25], [84.75, 46.15], [85.0, 46.25], [85.25, 46.15], [85.5, 46.25], [85.75, 46.15], [86.0, 46.25], [86.25, 46.15], [86.5, 46.25], [86.75, 46.15], [87.0, 46.25], [87.25, 46.15], [87.5, 46.25], [87.75, 46.15], [88.0, 46.25], [88.25, 46.15], [88.5, 46.25], [89.03, 46.03], [89.18, 45.68], [89.25, 45.65], [89.5, 45.75], [90.03, 45.53], [90.25, 45.0], [90.15, 44.75], [90.25, 44.5], [90.03, 43.97], [89.5, 43.75], [89.25, 43.85], [89.0, 43.75], [88.75, 43.85], [88.68, 43.82], [88.53, 43.47], [88.0, 43.25], [87.75, 43.35], [87.5, 43.25], [87.25, 43.35], [87.0, 43.25], [86.75, 43.35], [86.5, 43.25], [86.25, 43.35], [86.0, 43.25], [85.47, 43.47], [85.32, 43.82], [85.25, 43.85], [85.0, 43.75], [84.75, 43.85], [84.5, 43.75], [84.25, 43.85], [84.0, 43.75], [83.75, 43.85], [83.5, 43.75], [83.25, 43.85], [83.0, 43.75], [82.47, 43.97], [82.25, 44.5], [82.35, 44.75], [82.25, 45.0], [82.47, 45.53]]]]}, "2011-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[88.5, 45.75], [89.03, 45.53], [89.18, 45.18], [89.53, 45.03], [89.75, 44.5], [89.53, 43.97], [89.0, 43.75], [88.75, 43.85], [88.5, 43.75], [88.25, 43.85], [88.0, 43.75], [87.47, 43.97], [87.25, 44.5], [87.47, 45.03], [87.82, 45.18], [87.97, 45.53], [88.5, 45.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.591362291086057}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.465513275012217}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.424273865402768, 17.221037947679463, 16.25156617626658, 16.569155783092924]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.633059218364508, 12.355145114746563, 11.479143928114695, 15.85697735902022]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.393101292252773, -6.178071868008327, -6.813243263078143, -6.589778142410694]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.143549188525185, -8.067708832555923, -8.591362291086057, -6.749903731067548]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7910686418000763, -1.6628895792897391, -1.794798737068938, -1.5808410566457862]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1501403115609263, -2.081256132618739, -2.1861629463760925, -1.626775888264954]}}