{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:54.493116", "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": "2023-Jan-27_to_2023-Jan-29_120.0_24.0"}, "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": 2023010001206}, "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 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 85949.40329388565}, "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": ["South China Sea"]}, "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": 24.0}, "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": 120.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 116.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 120.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.85, 20.25], [115.75, 20.5], [115.85, 20.75], [115.75, 21.0], [115.97, 21.53], [116.32, 21.68], [116.47, 22.03], [116.82, 22.18], [116.97, 22.53], [117.5, 22.75], [117.75, 22.65], [117.82, 22.68], [117.97, 23.03], [118.32, 23.18], [118.35, 23.25], [118.25, 23.5], [118.47, 24.03], [118.82, 24.18], [118.97, 24.53], [119.5, 24.75], [119.75, 24.65], [120.0, 24.75], [120.53, 24.53], [120.68, 24.18], [121.03, 24.03], [121.25, 23.5], [121.15, 23.25], [121.25, 23.0], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 21.35], [118.68, 21.32], [118.53, 20.97], [118.18, 20.82], [118.15, 20.75], [118.25, 20.5], [118.03, 19.97], [117.68, 19.82], [117.53, 19.47], [117.18, 19.32], [117.03, 18.97], [116.5, 18.75], [115.97, 18.97], [115.75, 19.5], [115.85, 19.75], [115.75, 20.0], [115.85, 20.25]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.85, 20.25], [115.75, 20.5], [115.85, 20.75], [115.75, 21.0], [115.97, 21.53], [116.32, 21.68], [116.47, 22.03], [116.82, 22.18], [116.97, 22.53], [117.5, 22.75], [117.75, 22.65], [117.82, 22.68], [117.97, 23.03], [118.32, 23.18], [118.35, 23.25], [118.25, 23.5], [118.47, 24.03], [118.82, 24.18], [118.97, 24.53], [119.5, 24.75], [119.75, 24.65], [120.0, 24.75], [120.53, 24.53], [120.68, 24.18], [121.03, 24.03], [121.25, 23.5], [121.15, 23.25], [121.25, 23.0], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 21.35], [118.68, 21.32], [118.53, 20.97], [118.18, 20.82], [118.15, 20.75], [118.25, 20.5], [118.03, 19.97], [117.68, 19.82], [117.53, 19.47], [117.18, 19.32], [117.03, 18.97], [116.5, 18.75], [115.97, 18.97], [115.75, 19.5], [115.85, 19.75], [115.75, 20.0], [115.85, 20.25]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.85, 20.25], [115.75, 20.5], [115.85, 20.75], [115.75, 21.0], [115.97, 21.53], [116.32, 21.68], [116.47, 22.03], [116.82, 22.18], [116.97, 22.53], [117.5, 22.75], [117.75, 22.65], [117.82, 22.68], [117.97, 23.03], [118.32, 23.18], [118.35, 23.25], [118.25, 23.5], [118.47, 24.03], [118.82, 24.18], [118.97, 24.53], [119.5, 24.75], [119.75, 24.65], [120.0, 24.75], [120.53, 24.53], [120.68, 24.18], [121.03, 24.03], [121.25, 23.5], [121.15, 23.25], [121.25, 23.0], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 21.35], [118.68, 21.32], [118.53, 20.97], [118.18, 20.82], [118.15, 20.75], [118.25, 20.5], [118.03, 19.97], [117.68, 19.82], [117.53, 19.47], [117.18, 19.32], [117.03, 18.97], [116.5, 18.75], [115.97, 18.97], [115.75, 19.5], [115.85, 19.75], [115.75, 20.0], [115.85, 20.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.22666479756748}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3815846633774322}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.180997270382704, 14.853298546797134, 16.684137283947734]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.832942236988856, 9.285965068282167, 11.85238079108126]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1320875659338183, -4.426872578132366, -2.585793846066112]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.77740203742411, -6.22666479756748, -3.6890663712565015]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.800331742834301, -2.5055713988037867, -1.4456258257908747]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.0902157467910865, -3.199895573195592, -1.768458147041984]}}