{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:25.350042", "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-Sep-29_to_2011-Oct-02_116.5_42.0"}, "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": 2011090001322}, "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": "September 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 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": 57621.5087768303}, "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": 42.0}, "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": 116.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 42.53], [115.0, 42.75], [115.5, 42.54], [115.82, 42.68], [115.97, 43.03], [116.32, 43.18], [116.47, 43.53], [117.0, 43.75], [117.25, 43.65], [117.5, 43.75], [117.75, 43.65], [118.0, 43.75], [118.53, 43.53], [118.75, 43.0], [118.65, 42.75], [118.75, 42.5], [118.65, 42.25], [118.75, 42.0], [118.53, 41.47], [118.0, 41.25], [117.75, 41.35], [117.68, 41.32], [117.53, 40.97], [117.0, 40.75], [116.75, 40.85], [116.5, 40.75], [116.25, 40.85], [116.18, 40.82], [116.03, 40.47], [115.5, 40.25], [114.97, 40.47], [114.82, 40.82], [114.47, 40.97], [114.25, 41.5], [114.35, 41.75], [114.25, 42.0], [114.47, 42.53]]]]}, "2011-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 42.53], [115.0, 42.75], [115.5, 42.54], [115.82, 42.68], [115.97, 43.03], [116.32, 43.18], [116.47, 43.53], [117.0, 43.75], [117.25, 43.65], [117.5, 43.75], [117.75, 43.65], [118.0, 43.75], [118.53, 43.53], [118.75, 43.0], [118.65, 42.75], [118.75, 42.5], [118.65, 42.25], [118.75, 42.0], [118.65, 41.75], [118.75, 41.5], [118.65, 41.25], [118.75, 41.0], [118.53, 40.47], [118.0, 40.25], [117.75, 40.35], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.68, 40.82], [116.53, 40.47], [116.18, 40.32], [116.03, 39.97], [115.5, 39.75], [115.25, 39.85], [115.0, 39.75], [114.47, 39.97], [114.25, 40.5], [114.46, 41.0], [114.25, 41.5], [114.35, 41.75], [114.25, 42.0], [114.47, 42.53]]]]}, "2011-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 42.53], [115.0, 42.75], [115.5, 42.54], [115.82, 42.68], [115.97, 43.03], [116.32, 43.18], [116.47, 43.53], [117.0, 43.75], [117.25, 43.65], [117.5, 43.75], [117.75, 43.65], [118.0, 43.75], [118.53, 43.53], [118.75, 43.0], [118.65, 42.75], [118.75, 42.5], [118.65, 42.25], [118.75, 42.0], [118.65, 41.75], [118.75, 41.5], [118.65, 41.25], [118.75, 41.0], [118.53, 40.47], [118.0, 40.25], [117.75, 40.35], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.68, 40.82], [116.53, 40.47], [116.18, 40.32], [116.03, 39.97], [115.5, 39.75], [115.25, 39.85], [115.0, 39.75], [114.47, 39.97], [114.25, 40.5], [114.46, 41.0], [114.25, 41.5], [114.35, 41.75], [114.25, 42.0], [114.47, 42.53]]]]}, "2011-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 42.03], [115.0, 42.25], [115.25, 42.15], [115.32, 42.18], [115.47, 42.53], [116.0, 42.75], [116.25, 42.65], [116.5, 42.75], [117.03, 42.53], [117.18, 42.18], [117.25, 42.15], [117.5, 42.25], [117.75, 42.15], [118.0, 42.25], [118.53, 42.03], [118.75, 41.5], [118.65, 41.25], [118.75, 41.0], [118.53, 40.47], [118.0, 40.25], [117.75, 40.35], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.68, 40.82], [116.53, 40.47], [116.18, 40.32], [116.03, 39.97], [115.5, 39.75], [115.25, 39.85], [115.0, 39.75], [114.47, 39.97], [114.25, 40.5], [114.46, 41.0], [114.25, 41.5], [114.47, 42.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.169924734772735}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.844075303004983}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.5167383659028246, 3.36266769455284, 4.065115352060559, 4.40165225962744]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.2123073074652666, -0.06095318247872683, 0.8488229273573893, 1.7564544519906917]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.57653290588454, -6.251191491841569, -5.183713244885414, -5.387202628354487]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.169924734772735, -6.961325208489598, -6.057646587152249, -6.225693916370858]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.79178408580501, -1.7638211519915123, -1.4428681033785011, -1.5478627450025921]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0228162027166148, -2.044228559847019, -1.5327063759479078, -1.6815778489222972]}}