{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:34.315560", "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-Oct-16_to_2022-Oct-19_101.5_25.5"}, "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": 2022100000676}, "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": "October 16 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 19 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": 98107.09945176772}, "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": 25.5}, "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": 101.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "101.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 100.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[99.85, 27.25], [99.75, 27.5], [99.97, 28.03], [100.5, 28.25], [100.75, 28.15], [101.0, 28.25], [101.53, 28.03], [101.75, 27.5], [101.65, 27.25], [101.75, 27.0], [101.63, 26.7], [101.75, 26.65], [102.0, 26.75], [102.25, 26.65], [102.5, 26.75], [103.03, 26.53], [103.25, 26.0], [103.15, 25.75], [103.25, 25.5], [103.15, 25.25], [103.25, 25.0], [103.15, 24.75], [103.25, 24.5], [103.15, 24.25], [103.25, 24.0], [103.03, 23.47], [102.63, 23.3], [102.75, 23.0], [102.53, 22.47], [102.18, 22.32], [102.15, 22.25], [102.25, 22.0], [102.03, 21.47], [101.5, 21.25], [101.25, 21.35], [101.0, 21.25], [100.47, 21.47], [100.25, 22.0], [100.35, 22.25], [100.25, 22.5], [100.35, 22.75], [100.25, 23.0], [100.35, 23.25], [100.25, 23.5], [100.35, 23.75], [100.25, 24.0], [100.35, 24.25], [100.25, 24.5], [100.38, 24.8], [99.97, 24.97], [99.82, 25.32], [99.47, 25.47], [99.25, 26.0], [99.35, 26.25], [99.25, 26.5], [99.47, 27.03], [99.82, 27.18], [99.85, 27.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 26.5], [99.85, 26.75], [99.75, 27.0], [99.97, 27.53], [100.5, 27.75], [100.75, 27.65], [101.0, 27.75], [101.53, 27.53], [101.75, 27.0], [101.63, 26.7], [101.75, 26.65], [102.0, 26.75], [102.25, 26.65], [102.5, 26.75], [103.03, 26.53], [103.25, 26.0], [103.04, 25.5], [103.25, 25.0], [103.15, 24.75], [103.25, 24.5], [103.03, 23.97], [102.5, 23.75], [102.25, 23.85], [102.13, 23.8], [102.18, 23.68], [102.53, 23.53], [102.75, 23.0], [102.53, 22.47], [102.0, 22.25], [101.47, 22.47], [101.32, 22.82], [100.97, 22.97], [100.75, 23.5], [100.97, 24.03], [101.38, 24.2], [101.32, 24.32], [100.97, 24.47], [100.82, 24.82], [100.47, 24.97], [100.32, 25.32], [99.97, 25.47], [99.75, 26.0], [99.85, 26.25], [99.75, 26.5]]]]}, "2022-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.25, 26.5], [99.47, 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.6760779974430875}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8756037153218226}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.234347378351003, 14.268217484035915, 13.968284527140554, 14.2732920366322]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.026530713384489, 7.933104228998161, 8.110080877716257, 8.175906169195798]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4938542386095284, -2.9438266825356876, -3.1228866701601614, -2.723838176397885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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