{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:08.060909", "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": "2013-Aug-13_to_2013-Aug-19_112.0_23.5"}, "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": 2013080000662}, "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 13 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2013"}, "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": 225665.3479551674}, "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.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": 23.5}, "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": 112.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.5, 22.75], [113.03, 22.53], [113.25, 22.0], [113.03, 21.47], [112.5, 21.25], [111.97, 21.47], [111.75, 22.0], [111.97, 22.53], [112.5, 22.75]]]]}, "2013-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 23.0], [109.97, 23.53], [110.5, 23.75], [110.75, 23.65], [111.0, 23.75], [111.25, 23.65], [111.32, 23.68], [111.47, 24.03], [111.82, 24.18], [111.97, 24.53], [112.5, 24.75], [112.75, 24.65], [113.0, 24.75], [113.53, 24.53], [113.75, 24.0], [113.65, 23.75], [113.75, 23.5], [113.65, 23.25], [113.68, 23.18], [114.03, 23.03], [114.25, 22.5], [114.03, 21.97], [113.5, 21.75], [113.25, 21.85], [113.18, 21.82], [113.03, 21.47], [112.5, 21.25], [112.25, 21.35], [112.0, 21.25], [111.75, 21.35], [111.68, 21.32], [111.53, 20.97], [111.0, 20.75], [110.47, 20.97], [110.32, 21.32], [109.97, 21.47], [109.75, 22.0], [109.85, 22.25], [109.75, 22.5], [109.85, 22.75], [109.75, 23.0]]], [[[113.47, 25.47], [113.25, 26.0], [113.47, 26.53], [114.0, 26.75], [114.53, 26.53], [114.75, 26.0], [114.53, 25.47], [114.0, 25.25], [113.47, 25.47]]]]}, "2013-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.46, 23.5], [109.25, 24.0], [109.35, 24.25], [109.25, 24.5], [109.47, 25.03], [109.82, 25.18], [109.97, 25.53], [110.32, 25.68], [110.47, 26.03], [111.0, 26.25], [111.25, 26.15], [111.5, 26.25], [111.75, 26.15], [112.0, 26.25], [112.25, 26.15], [112.5, 26.25], [112.75, 26.15], [113.0, 26.25], [113.25, 26.15], [113.32, 26.18], [113.47, 26.53], [114.0, 26.75], [114.53, 26.53], [114.75, 26.0], [114.65, 25.75], [114.75, 25.5], [114.54, 25.0], [114.75, 24.5], [114.53, 23.97], [114.18, 23.82], [114.15, 23.75], [114.25, 23.5], [114.15, 23.25], [114.25, 23.0], [114.15, 22.75], [114.25, 22.5], [114.03, 21.97], [113.5, 21.75], [113.25, 21.85], [113.18, 21.82], [113.03, 21.47], [112.5, 21.25], [112.25, 21.35], [112.0, 21.25], [111.75, 21.35], [111.68, 21.32], [111.53, 20.97], [111.0, 20.75], [110.47, 20.97], [110.32, 21.32], [109.97, 21.47], [109.82, 21.82], [109.47, 21.97], [109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.46, 23.5]]]]}, "2013-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.35, 22.75], [109.25, 23.0], [109.46, 23.5], [109.25, 24.0], [109.35, 24.25], [109.25, 24.5], [109.47, 25.03], [109.82, 25.18], [109.85, 25.25], [109.75, 25.5], [109.97, 26.03], [110.32, 26.18], [110.47, 26.53], [111.0, 26.75], [111.25, 26.65], [111.5, 26.75], [111.75, 26.65], [112.0, 26.75], [112.25, 26.65], [112.5, 26.75], [113.03, 26.53], [113.18, 26.18], [113.25, 26.15], [113.32, 26.18], [113.47, 26.53], [114.0, 26.75], [114.25, 26.65], [114.5, 26.75], [115.03, 26.53], [115.25, 26.0], [115.15, 25.75], [115.18, 25.68], [115.53, 25.53], [115.75, 25.0], [115.65, 24.75], [115.75, 24.5], [115.53, 23.97], [115.0, 23.75], [114.75, 23.85], [114.68, 23.82], [114.65, 23.75], [114.75, 23.5], [114.53, 22.97], [114.18, 22.82], [114.15, 22.75], [114.25, 22.5], [114.03, 21.97], [113.5, 21.75], [113.25, 21.85], [113.18, 21.82], [113.03, 21.47], [112.5, 21.25], [112.25, 21.35], [112.0, 21.25], [111.75, 21.35], [111.68, 21.32], [111.53, 20.97], [111.0, 20.75], [110.47, 20.97], [110.32, 21.32], [110.25, 21.35], [110.0, 21.25], [109.47, 21.47], [109.25, 22.0], [109.35, 22.25], [109.25, 22.5], [109.35, 22.75]]]]}, "2013-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.25, 25.0], [109.47, 25.53], [109.82, 25.68], [109.88, 25.8], [109.47, 25.97], [109.25, 26.5], [109.47, 27.03], [110.0, 27.25], [110.25, 27.15], [110.5, 27.25], [111.03, 27.03], [111.18, 26.68], [111.25, 26.65], [111.5, 26.75], [111.75, 26.65], [112.0, 26.75], [112.25, 26.65], [112.5, 26.75], [113.03, 26.53], [113.18, 26.18], [113.25, 26.15], [113.32, 26.18], [113.47, 26.53], [114.0, 26.75], [114.25, 26.65], [114.5, 26.75], [115.03, 26.53], [115.25, 26.0], [115.15, 25.75], [115.18, 25.68], [115.53, 25.53], [115.75, 25.0], [115.65, 24.75], [115.75, 24.5], [115.53, 23.97], [115.0, 23.75], [114.75, 23.85], [114.68, 23.82], [114.65, 23.75], [114.75, 23.5], [114.53, 22.97], [114.18, 22.82], [114.03, 22.47], [113.5, 22.25], [113.25, 22.35], [113.0, 22.25], [112.75, 22.35], [112.68, 22.32], [112.53, 21.97], [112.0, 21.75], [111.7, 21.88], [111.53, 21.47], [111.0, 21.25], [110.75, 21.35], [110.5, 21.25], [110.25, 21.35], [110.0, 21.25], [109.47, 21.47], [109.25, 22.0], [109.35, 22.25], [109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.38, 23.3], [108.97, 23.47], [108.75, 24.0], [108.97, 24.53], [109.32, 24.68], [109.35, 24.75], [109.25, 25.0]]]]}, "2013-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.25, 25.0], [109.47, 25.53], [109.82, 25.68], [109.88, 25.8], [109.47, 25.97], [109.25, 26.5], [109.47, 27.03], [110.0, 27.25], [110.25, 27.15], [110.5, 27.25], [111.03, 27.03], [111.18, 26.68], [111.25, 26.65], [111.5, 26.75], [111.75, 26.65], [112.0, 26.75], [112.25, 26.65], [112.5, 26.75], [113.03, 26.53], [113.18, 26.18], [113.25, 26.15], [113.32, 26.18], [113.47, 26.53], [114.0, 26.75], [114.25, 26.65], [114.5, 26.75], [115.03, 26.53], [115.25, 26.0], [115.15, 25.75], [115.18, 25.68], [115.53, 25.53], [115.75, 25.0], [115.65, 24.75], [115.75, 24.5], [115.53, 23.97], [115.0, 23.75], [114.75, 23.85], [114.68, 23.82], [114.65, 23.75], [114.75, 23.5], [114.53, 22.97], [114.0, 22.75], [113.75, 22.85], [113.5, 22.75], [113.25, 22.85], [113.18, 22.82], [113.03, 22.47], [112.5, 22.25], [112.0, 22.46], [111.63, 22.3], [111.75, 22.0], [111.53, 21.47], [111.0, 21.25], [110.75, 21.35], [110.5, 21.25], [110.25, 21.35], [110.0, 21.25], [109.47, 21.47], [109.25, 22.0], [109.35, 22.25], [109.25, 22.5], [109.47, 23.03], [109.82, 23.18], [109.85, 23.25], [109.82, 23.32], [109.75, 23.35], [109.5, 23.25], [108.97, 23.47], [108.75, 24.0], [108.97, 24.53], [109.32, 24.68], [109.35, 24.75], [109.25, 25.0]]]]}, "2013-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.25, 25.0], [109.47, 25.53], [109.82, 25.68], [109.88, 25.8], [109.47, 25.97], [109.25, 26.5], [109.47, 27.03], [110.0, 27.25], [110.25, 27.15], [110.5, 27.25], [111.03, 27.03], [111.25, 26.5], [111.04, 26.0], [111.25, 25.5], [111.03, 24.97], [110.68, 24.82], [110.65, 24.75], [110.68, 24.68], [111.03, 24.53], [111.2, 24.13], [111.5, 24.25], [111.75, 24.15], [112.0, 24.25], [112.53, 24.03], [112.68, 23.68], [113.03, 23.53], [113.25, 23.0], [113.03, 22.47], [112.5, 22.25], [111.97, 22.47], [111.82, 22.82], [111.75, 22.85], [111.5, 22.75], [111.0, 22.96], [110.63, 22.8], [110.75, 22.5], [110.65, 22.25], [110.75, 22.0], [110.53, 21.47], [110.0, 21.25], [109.47, 21.47], [109.25, 22.0], [109.35, 22.25], [109.25, 22.5], [109.47, 23.03], [109.88, 23.2], [109.8, 23.38], [109.5, 23.25], [108.97, 23.47], [108.75, 24.0], [108.97, 24.53], [109.32, 24.68], [109.35, 24.75], [109.25, 25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.616873164055505}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4924321703149372}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.636989423543355, 25.548203120883386, 24.896000954792385, 24.74743643946391, 24.439056455560035, 24.57532102980582, 25.326404292368125]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.636989423543355, 21.604361713199808, 21.334574915562996, 20.902111685642524, 20.411291773909056, 21.033845123490835, 22.446881177070225]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.670182125809788, -2.007619380437677, -2.3684042662109275, -2.510208347645913, -2.734547138950396, -2.5857654517097384, -2.1584584343312723]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.670182125809788, -2.326096623104206, -3.0731474147921176, -3.459900200330992, -3.616873164055505, -3.361925226953929, -2.9138586010656127]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.400736172188251, -1.6563448556483706, -1.7696056163020188, -1.766685135270016, -1.8456285754329262, -1.7017733709973846, -1.4186687972039755]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.400736172188251, -1.8814832379695623, -2.2954162064965167, -2.283402712394697, -2.53077486050581, -2.1683789999225938, -1.5541968634922847]}}