{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:05.323745", "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-Feb-22_to_2023-Feb-27_115.5_17.0"}, "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": 2023020000848}, "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": "February 22 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 65218.26889440523}, "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 Basin", "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": 17.0}, "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": 115.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 116.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.25, 16.5], [113.47, 17.03], [113.82, 17.18], [113.97, 17.53], [114.32, 17.68], [114.47, 18.03], [114.82, 18.18], [114.97, 18.53], [115.5, 18.75], [116.03, 18.53], [116.18, 18.18], [116.25, 18.15], [116.5, 18.25], [117.03, 18.03], [117.25, 17.5], [117.03, 16.97], [116.68, 16.82], [116.53, 16.47], [116.18, 16.32], [116.03, 15.97], [115.68, 15.82], [115.65, 15.75], [115.75, 15.5], [115.65, 15.25], [115.75, 15.0], [115.53, 14.47], [115.0, 14.25], [114.75, 14.35], [114.5, 14.25], [114.25, 14.35], [114.0, 14.25], [113.47, 14.47], [113.25, 15.0], [113.35, 15.25], [113.25, 15.5], [113.35, 15.75], [113.25, 16.0], [113.35, 16.25], [113.25, 16.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 16.0], [113.97, 16.53], [114.5, 16.75], [114.93, 16.57], [114.75, 17.0], [114.97, 17.53], [115.5, 17.75], [116.03, 17.53], [116.25, 17.0], [116.03, 16.47], [115.5, 16.25], [115.07, 16.43], [115.25, 16.0], [115.15, 15.75], [115.25, 15.5], [115.03, 14.97], [114.5, 14.75], [113.97, 14.97], [113.75, 15.5], [113.85, 15.75], [113.75, 16.0]]]]}, "2023-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 15.5], [113.35, 15.75], [113.25, 16.0], [113.35, 16.25], [113.25, 16.5], [113.47, 17.03], [113.82, 17.18], [113.97, 17.53], [114.32, 17.68], [114.47, 18.03], [115.0, 18.25], [115.25, 18.15], [115.5, 18.25], [116.03, 18.03], [116.18, 17.68], [116.53, 17.53], [116.75, 17.0], [116.53, 16.47], [116.18, 16.32], [116.03, 15.97], [115.68, 15.82], [115.65, 15.75], [115.75, 15.5], [115.65, 15.25], [115.75, 15.0], [115.53, 14.47], [115.0, 14.25], [114.75, 14.35], [114.5, 14.25], [114.25, 14.35], [114.0, 14.25], [113.47, 14.47], [113.25, 15.0], [113.35, 15.25], [113.25, 15.5]]]]}, "2023-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 15.5], [113.35, 15.75], [113.25, 16.0], [113.35, 16.25], [113.25, 16.5], [113.47, 17.03], [113.82, 17.18], [113.97, 17.53], [114.32, 17.68], [114.47, 18.03], [114.82, 18.18], [114.97, 18.53], [115.5, 18.75], [116.03, 18.53], [116.18, 18.18], [116.25, 18.15], [116.5, 18.25], [117.03, 18.03], [117.25, 17.5], [117.03, 16.97], [116.68, 16.82], [116.53, 16.47], [116.18, 16.32], [116.03, 15.97], [115.68, 15.82], [115.65, 15.75], [115.75, 15.5], [115.65, 15.25], [115.75, 15.0], [115.53, 14.47], [115.0, 14.25], [114.75, 14.35], [114.5, 14.25], [114.25, 14.35], [114.0, 14.25], [113.47, 14.47], [113.25, 15.0], [113.35, 15.25], [113.25, 15.5]]]]}, "2023-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 15.5], [113.35, 15.75], [113.25, 16.0], [113.35, 16.25], [113.25, 16.5], [113.47, 17.03], [113.82, 17.18], [113.97, 17.53], [114.32, 17.68], [114.47, 18.03], [114.82, 18.18], [114.97, 18.53], [115.5, 18.75], [116.03, 18.53], [116.18, 18.18], [116.25, 18.15], [116.5, 18.25], [117.03, 18.03], [117.25, 17.5], [117.03, 16.97], [116.68, 16.82], [116.53, 16.47], [116.18, 16.32], [116.03, 15.97], [115.68, 15.82], [115.65, 15.75], [115.75, 15.5], [115.65, 15.25], [115.75, 15.0], [115.53, 14.47], [115.0, 14.25], [114.75, 14.35], [114.5, 14.25], [114.25, 14.35], [114.0, 14.25], [113.47, 14.47], [113.25, 15.0], [113.35, 15.25], [113.25, 15.5]]]]}, "2023-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 15.5], [113.35, 15.75], [113.25, 16.0], [113.35, 16.25], [113.25, 16.5], [113.47, 17.03], [113.82, 17.18], [113.97, 17.53], [114.32, 17.68], [114.47, 18.03], [114.82, 18.18], [114.97, 18.53], [115.5, 18.75], [116.03, 18.53], [116.18, 18.18], [116.25, 18.15], [116.5, 18.25], [117.03, 18.03], [117.25, 17.5], [117.03, 16.97], [116.5, 16.75], [116.25, 16.85], [116.18, 16.82], [116.15, 16.75], [116.25, 16.5], [116.03, 15.97], [115.68, 15.82], [115.65, 15.75], [115.75, 15.5], [115.53, 14.97], [115.0, 14.75], [114.75, 14.85], [114.68, 14.82], [114.53, 14.47], [114.0, 14.25], [113.47, 14.47], [113.25, 15.0], [113.35, 15.25], [113.25, 15.5]]]]}, "2023-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.97, 18.03], [115.5, 18.25], [116.03, 18.03], [116.25, 17.5], [116.03, 16.97], [115.5, 16.75], [114.97, 16.97], [114.75, 17.5], [114.97, 18.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7599366400824579}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2288227686889637}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.754072321599836, 23.455777635992035, 23.529125589959165, 23.318539240300538, 23.474969226632425, 23.088868871187117]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.343225713502193, 22.78256310265664, 22.694562552870423, 22.15398774704039, 22.652391465520054, 23.088868871187117]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.970672744645204, -1.2488900338577256, -1.148280086397808, -1.3908930461552054, -1.1628388777279348, -1.0820816370214175]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9791640853089234, -1.4014217926070955, -1.2788048515346873, -1.7599366400824579, -1.3119325797192687, -1.0820816370214175]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1867324424350976, -1.5278470818006433, -1.404879919118886, -1.6948507192843507, -1.4068593296080874, -1.3012581973876696]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.206291837099964, -1.6929099675501964, -1.571035221996498, -2.0525270428020033, -1.5549257615344145, -1.3012581973876696]}}