{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:06.289125", "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-Dec-11_to_2022-Dec-14_112.0_20.0"}, "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": 2022120000603}, "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 11 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 58070.20693820955}, "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": 20.0}, "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": 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": 111.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[110.47, 19.53], [110.82, 19.68], [110.85, 19.75], [110.75, 20.0], [110.97, 20.53], [111.32, 20.68], [111.47, 21.03], [111.82, 21.18], [111.85, 21.25], [111.75, 21.5], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [112.82, 22.18], [112.97, 22.53], [113.5, 22.75], [113.75, 22.65], [114.0, 22.75], [114.53, 22.53], [114.75, 22.0], [114.53, 21.47], [114.0, 21.25], [113.75, 21.35], [113.68, 21.32], [113.65, 21.25], [113.75, 21.0], [113.65, 20.75], [113.75, 20.5], [113.53, 19.97], [113.18, 19.82], [113.03, 19.47], [112.68, 19.32], [112.65, 19.25], [112.75, 19.0], [112.53, 18.47], [112.18, 18.32], [112.03, 17.97], [111.68, 17.82], [111.65, 17.75], [111.75, 17.5], [111.53, 16.97], [111.0, 16.75], [110.47, 16.97], [110.25, 17.5], [110.35, 17.75], [110.25, 18.0], [110.46, 18.5], [110.25, 19.0], [110.47, 19.53]]]]}}, "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": {"2022-12-11T11:30:00.000000000": 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22.15], [112.82, 22.18], [112.97, 22.53], [113.5, 22.75], [113.75, 22.65], [114.0, 22.75], [114.53, 22.53], [114.75, 22.0], [114.53, 21.47], [114.0, 21.25], [113.75, 21.35], [113.68, 21.32], [113.65, 21.25], [113.75, 21.0], [113.65, 20.75], [113.75, 20.5], [113.53, 19.97], [113.18, 19.82], [113.03, 19.47], [112.68, 19.32], [112.65, 19.25], [112.75, 19.0], [112.53, 18.47], [112.18, 18.32], [112.03, 17.97], [111.68, 17.82], [111.65, 17.75], [111.75, 17.5], [111.53, 16.97], [111.0, 16.75], [110.47, 16.97], [110.25, 17.5], [110.35, 17.75], [110.25, 18.0]]]]}, "2022-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 18.0], [110.46, 18.5], [110.25, 19.0], [110.47, 19.53], [110.82, 19.68], [110.85, 19.75], [110.75, 20.0], [110.97, 20.53], [111.32, 20.68], [111.47, 21.03], [111.82, 21.18], [111.85, 21.25], [111.75, 21.5], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [112.82, 22.18], [112.97, 22.53], [113.5, 22.75], [113.75, 22.65], [114.0, 22.75], [114.53, 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t2m anomaly recorded over entire duration", "value": -3.889470966440058}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.493309098090825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.41985968911621, 18.970460646446668, 18.986006395160643, 15.212772860140547]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.085441239542376, 15.124269234821952, 14.565107454028919, 13.97575713650457]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.026244331919251, -2.6277552673945705, -2.490166845256735, -3.3692877307269216]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.527540494214975, -3.168599300720871, -3.526365724057257, -3.889470966440058]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5014056620325924, -1.8185941509973151, -1.5635695175119497, -1.6123554217464957]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6642084272771627, -1.9541120268351144, -1.7148676849298021, -1.786369059076304]}}