{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:07.642387", "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-Dec-22_to_2011-Dec-26_129.0_44.0"}, "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": 2011120001162}, "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": "December 22 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 26 2011"}, "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": 62870.10047063914}, "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": 44.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.47, 43.47], [128.25, 44.0], [128.47, 44.53], [129.0, 44.75], [129.25, 44.65], [129.32, 44.68], [129.47, 45.03], [130.0, 45.25], [130.53, 45.03], [130.68, 44.68], [131.03, 44.53], [131.25, 44.0], [131.15, 43.75], [131.25, 43.5], [131.03, 42.97], [130.5, 42.75], [129.97, 42.97], [129.82, 43.32], [129.75, 43.35], [129.5, 43.25], [129.25, 43.35], [129.0, 43.25], [128.47, 43.47]]]]}, "2011-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.47, 43.47], [128.25, 44.0], [128.47, 44.53], [129.0, 44.75], [129.25, 44.65], [129.32, 44.68], [129.47, 45.03], [130.0, 45.25], [130.53, 45.03], [130.68, 44.68], [131.03, 44.53], [131.25, 44.0], [131.15, 43.75], [131.25, 43.5], [131.03, 42.97], [130.5, 42.75], [129.97, 42.97], [129.82, 43.32], [129.75, 43.35], [129.5, 43.25], [129.25, 43.35], [129.0, 43.25], [128.47, 43.47]]]]}, "2011-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.35, 43.25], [126.25, 43.5], [126.35, 43.75], [126.25, 44.0], [126.47, 44.53], [126.82, 44.68], [126.97, 45.03], [127.5, 45.25], [128.03, 45.03], [128.18, 44.68], [128.25, 44.65], [128.5, 44.75], [128.75, 44.65], [129.0, 44.75], [129.25, 44.65], [129.32, 44.68], [129.47, 45.03], [130.0, 45.25], [130.53, 45.03], [130.68, 44.68], [131.03, 44.53], [131.25, 44.0], [131.15, 43.75], [131.25, 43.5], [131.03, 42.97], [130.5, 42.75], [130.2, 42.88], [130.03, 42.47], [129.68, 42.32], [129.53, 41.97], [129.0, 41.75], [128.75, 41.85], [128.68, 41.82], [128.53, 41.47], [128.0, 41.25], [127.47, 41.47], [127.32, 41.82], [127.25, 41.85], [127.0, 41.75], [126.47, 41.97], [126.25, 42.5], [126.35, 42.75], [126.25, 43.0], [126.35, 43.25]]]]}, "2011-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.35, 43.25], [126.25, 43.5], [126.35, 43.75], [126.25, 44.0], [126.47, 44.53], [126.82, 44.68], [126.97, 45.03], [127.5, 45.25], [128.03, 45.03], [128.18, 44.68], [128.25, 44.65], [128.5, 44.75], [128.75, 44.65], [129.0, 44.75], [129.25, 44.65], [129.5, 44.75], [129.75, 44.65], [130.0, 44.75], [130.25, 44.65], 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evolution of mean t2m anomalies.", "value": [-8.340715693240943, -8.273550270526451, -10.1215669890229, -10.088617524268807, -8.40818712198555]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.061980776865113, -9.415540158501159, -13.858876977977616, -13.53063382102377, -9.961798231944243]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6589657037427443, -1.597850410877968, -1.839891869737331, -1.8185368372678543, -1.5634117964274328]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9159359640937468, -1.748822280067035, -2.520938253547827, -2.2895799614828904, -1.856482475071032]}}