{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.763273", "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_112.0_19.5"}, "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": 2023010001250}, "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": 69576.56700188998}, "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": ["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": 19.5}, "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": 110.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[110.85, 20.25], [110.75, 20.5], [110.97, 21.03], [111.5, 21.25], [111.75, 21.15], [111.82, 21.18], [111.97, 21.53], [112.5, 21.75], [112.75, 21.65], [113.0, 21.75], [113.25, 21.65], [113.32, 21.68], [113.47, 22.03], [114.0, 22.25], [114.25, 22.15], [114.5, 22.25], [115.03, 22.03], [115.25, 21.5], [115.15, 21.25], [115.25, 21.0], [115.03, 20.47], [114.68, 20.32], [114.53, 19.97], [114.18, 19.82], [114.03, 19.47], [113.5, 19.25], [113.25, 19.35], [113.18, 19.32], [113.03, 18.97], [112.5, 18.75], [112.25, 18.85], [112.0, 18.75], [111.75, 18.85], [111.68, 18.82], [111.53, 18.47], [111.0, 18.25], [110.75, 18.35], [110.5, 18.25], [109.97, 18.47], [109.75, 19.0], [109.97, 19.53], [110.32, 19.68], [110.47, 20.03], [110.82, 20.18], [110.85, 20.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.E.Asia"]}, "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": [[[[110.47, 20.03], [110.82, 20.18], [110.85, 20.25], [110.75, 20.5], [110.97, 21.03], [111.5, 21.25], [111.75, 21.15], [111.82, 21.18], [111.97, 21.53], [112.5, 21.75], [112.75, 21.65], [113.0, 21.75], [113.25, 21.65], [113.32, 21.68], [113.47, 22.03], [114.0, 22.25], [114.25, 22.15], [114.5, 22.25], [115.03, 22.03], [115.25, 21.5], [115.15, 21.25], [115.25, 21.0], [115.03, 20.47], [114.68, 20.32], [114.53, 19.97], [114.18, 19.82], [114.03, 19.47], [113.5, 19.25], [113.25, 19.35], [113.18, 19.32], [113.03, 18.97], [112.5, 18.75], [112.25, 18.85], [112.0, 18.75], [111.75, 18.85], [111.68, 18.82], [111.53, 18.47], [111.0, 18.25], [110.75, 18.35], [110.5, 18.25], [109.97, 18.47], [109.75, 19.0], [109.97, 19.53], [110.32, 19.68], [110.47, 20.03]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.47, 20.03], [110.82, 20.18], [110.85, 20.25], [110.75, 20.5], [110.97, 21.03], [111.5, 21.25], [111.75, 21.15], [111.82, 21.18], [111.97, 21.53], [112.5, 21.75], [112.75, 21.65], [113.0, 21.75], [113.25, 21.65], [113.32, 21.68], [113.47, 22.03], [114.0, 22.25], [114.25, 22.15], [114.5, 22.25], [115.03, 22.03], [115.25, 21.5], [115.15, 21.25], [115.25, 21.0], [115.03, 20.47], [114.68, 20.32], [114.53, 19.97], [114.18, 19.82], [114.03, 19.47], [113.5, 19.25], [113.25, 19.35], [113.18, 19.32], [113.03, 18.97], [112.5, 18.75], [112.25, 18.85], [112.0, 18.75], [111.75, 18.85], [111.68, 18.82], [111.53, 18.47], [111.0, 18.25], [110.75, 18.35], [110.5, 18.25], [109.97, 18.47], [109.75, 19.0], [109.97, 19.53], [110.32, 19.68], [110.47, 20.03]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.47, 20.03], [110.82, 20.18], [110.85, 20.25], [110.75, 20.5], [110.97, 21.03], [111.5, 21.25], [111.75, 21.15], [111.82, 21.18], [111.97, 21.53], [112.5, 21.75], [112.75, 21.65], [113.0, 21.75], [113.25, 21.65], [113.32, 21.68], [113.47, 22.03], [114.0, 22.25], [114.25, 22.15], [114.5, 22.25], [115.03, 22.03], [115.25, 21.5], [115.15, 21.25], [115.25, 21.0], [115.03, 20.47], [114.68, 20.32], [114.53, 19.97], [114.18, 19.82], [114.03, 19.47], [113.5, 19.25], [113.25, 19.35], [113.18, 19.32], [113.03, 18.97], [112.5, 18.75], [112.25, 18.85], [112.0, 18.75], [111.75, 18.85], [111.68, 18.82], [111.53, 18.47], [111.0, 18.25], [110.75, 18.35], [110.5, 18.25], [109.97, 18.47], [109.75, 19.0], [109.97, 19.53], [110.32, 19.68], [110.47, 20.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.028343150054411}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.211207733930005}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.915249182306752, 16.095329128473907, 16.541552046232425]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.757220223337356, 14.369937039903675, 15.165268683211195]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.761940284456029, -3.648032991397701, -3.223649925936286]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2031737757715746, -3.9060792046197435, -4.028343150054411]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4406454898689056, -2.006339794772038, -1.7850319257131468]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5506645523322213, -2.2580880967863495, -2.261973869643791]}}