{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:56.603291", "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": "2022-Jan-31_to_2022-Feb-04_115.0_43.5"}, "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": 2022010001216}, "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": "January 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 04 2022"}, "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": 51622.8779909507}, "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"]}, "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": 43.5}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 116.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [113.82, 44.68], [113.97, 45.03], [114.5, 45.25], [114.75, 45.15], [115.0, 45.25], [115.53, 45.03], [115.68, 44.68], [115.75, 44.65], [116.0, 44.75], [116.53, 44.53], [116.75, 44.0], [116.65, 43.75], [116.75, 43.5], [116.65, 43.25], [116.75, 43.0], [116.53, 42.47], [116.18, 42.32], [116.15, 42.25], [116.25, 42.0], [116.03, 41.47], [115.5, 41.25], [114.97, 41.47], [114.8, 41.88], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [114.0, 44.75], [114.3, 44.63], [114.47, 45.03], [115.0, 45.25], [115.53, 45.03], [115.68, 44.68], [115.75, 44.65], [116.0, 44.75], [116.53, 44.53], [116.75, 44.0], [116.53, 43.47], [116.18, 43.32], [116.15, 43.25], [116.25, 43.0], [116.03, 42.47], [115.5, 42.25], [115.25, 42.35], [115.18, 42.32], [115.03, 41.97], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5]]]]}, "2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [113.82, 44.68], [113.97, 45.03], [114.5, 45.25], [114.75, 45.15], [115.0, 45.25], [115.53, 45.03], [115.68, 44.68], [115.75, 44.65], [116.0, 44.75], [116.53, 44.53], [116.75, 44.0], [116.65, 43.75], [116.75, 43.5], [116.65, 43.25], [116.75, 43.0], [116.53, 42.47], [116.0, 42.25], [115.75, 42.35], [115.5, 42.25], [115.25, 42.35], [115.18, 42.32], [115.03, 41.97], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [113.82, 44.68], [113.97, 45.03], [114.5, 45.25], [114.75, 45.15], [115.0, 45.25], [115.53, 45.03], [115.68, 44.68], [115.75, 44.65], [116.0, 44.75], [116.53, 44.53], [116.75, 44.0], [116.65, 43.75], [116.75, 43.5], [116.65, 43.25], [116.75, 43.0], [116.53, 42.47], [116.18, 42.32], [116.15, 42.25], [116.25, 42.0], [116.03, 41.47], [115.5, 41.25], [114.97, 41.47], [114.8, 41.88], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5]]]]}, "2022-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [113.82, 44.68], [113.97, 45.03], [114.5, 45.25], [114.75, 45.15], [115.0, 45.25], [115.53, 45.03], [115.68, 44.68], [115.75, 44.65], [116.0, 44.75], [116.53, 44.53], [116.75, 44.0], [116.65, 43.75], [116.75, 43.5], [116.65, 43.25], [116.75, 43.0], [116.53, 42.47], [116.18, 42.32], [116.15, 42.25], [116.25, 42.0], [116.03, 41.47], [115.5, 41.25], [114.97, 41.47], [114.8, 41.88], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5]]]]}, "2022-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 43.5], [112.85, 43.75], [112.75, 44.0], [112.97, 44.53], [113.5, 44.75], [113.75, 44.65], [114.0, 44.75], [114.25, 44.65], [114.5, 44.75], [114.75, 44.65], [115.0, 44.75], [115.25, 44.65], [115.5, 44.75], [116.03, 44.53], [116.18, 44.18], [116.53, 44.03], [116.75, 43.5], [116.65, 43.25], [116.75, 43.0], [116.53, 42.47], [116.18, 42.32], [116.15, 42.25], [116.25, 42.0], [116.03, 41.47], [115.5, 41.25], [114.97, 41.47], [114.8, 41.88], [114.5, 41.75], [113.97, 41.97], [113.82, 42.32], [113.75, 42.35], [113.5, 42.25], [112.97, 42.47], [112.75, 43.0], [112.85, 43.25], [112.75, 43.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.999515064060546}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.216391714027342}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.831708241131423, -24.368067634894686, -24.134474535882788, -25.088825139156313, -23.44180962889351]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.186198628082167, -27.707557907530628, -28.130672408302615, -28.356250486060077, -26.145546013305534]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.5701154118463645, -7.9316386251425195, -8.092420640145406, -9.246414201984551, -8.022758188023683]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.901036983451291, -10.878842232583139, -11.561885233466484, -11.999515064060546, -9.836845273004343]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.475468108962007, -1.5840637093380736, -1.629220764816867, -1.8181099471886724, -1.5401216356485141]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8285514444102942, -2.0960837941734933, -2.24893198929115, -2.2794423653651816, -1.847063152965075]}}