{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:10.872843", "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-Nov-29_to_2023-Dec-01_110.5_37.0"}, "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": 2023110000634}, "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": "November 29 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 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": 56576.70842576389}, "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": 37.0}, "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": 110.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "110.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 108.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 111.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[107.97, 37.03], [108.5, 37.25], [108.75, 37.15], [108.82, 37.18], [108.85, 37.25], [108.82, 37.32], [108.47, 37.47], [108.25, 38.0], [108.47, 38.53], [108.82, 38.68], [108.97, 39.03], [109.5, 39.25], [109.75, 39.15], [110.0, 39.25], [110.25, 39.15], [110.5, 39.25], [110.75, 39.15], [111.0, 39.25], [111.53, 39.03], [111.75, 38.5], [111.54, 38.0], [111.75, 37.5], [111.53, 36.97], [111.18, 36.82], [111.15, 36.75], [111.25, 36.5], [111.15, 36.25], [111.18, 36.18], [111.53, 36.03], [111.75, 35.5], [111.53, 34.97], [111.0, 34.75], [110.47, 34.97], [110.32, 35.32], [109.97, 35.47], [109.82, 35.82], [109.75, 35.85], [109.68, 35.82], [109.53, 35.47], [109.0, 35.25], [108.47, 35.47], [108.32, 35.82], [107.97, 35.97], [107.75, 36.5], [107.97, 37.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 35.97], [107.75, 36.5], [107.97, 37.03], [108.5, 37.25], [108.75, 37.15], [108.82, 37.18], [108.85, 37.25], [108.82, 37.32], [108.47, 37.47], [108.25, 38.0], [108.47, 38.53], [108.82, 38.68], [108.97, 39.03], [109.5, 39.25], [109.75, 39.15], [110.0, 39.25], [110.25, 39.15], [110.5, 39.25], [110.75, 39.15], [111.0, 39.25], [111.53, 39.03], [111.75, 38.5], [111.54, 38.0], [111.75, 37.5], [111.53, 36.97], [111.18, 36.82], [111.15, 36.75], [111.25, 36.5], [111.15, 36.25], [111.18, 36.18], [111.53, 36.03], [111.75, 35.5], [111.53, 34.97], [111.0, 34.75], [110.47, 34.97], [110.32, 35.32], [109.97, 35.47], [109.82, 35.82], [109.75, 35.85], [109.68, 35.82], [109.53, 35.47], [109.0, 35.25], [108.47, 35.47], [108.32, 35.82], [107.97, 35.97]]]]}, "2023-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 35.97], [107.75, 36.5], [107.97, 37.03], [108.5, 37.25], [108.75, 37.15], [108.82, 37.18], [108.85, 37.25], [108.82, 37.32], [108.47, 37.47], [108.25, 38.0], [108.47, 38.53], [108.82, 38.68], [108.97, 39.03], [109.5, 39.25], [109.75, 39.15], [110.0, 39.25], [110.25, 39.15], [110.5, 39.25], [110.75, 39.15], [111.0, 39.25], [111.53, 39.03], [111.75, 38.5], [111.54, 38.0], [111.75, 37.5], [111.53, 36.97], [111.18, 36.82], [111.15, 36.75], [111.25, 36.5], [111.15, 36.25], [111.18, 36.18], [111.53, 36.03], [111.75, 35.5], [111.53, 34.97], [111.0, 34.75], [110.47, 34.97], [110.32, 35.32], [109.97, 35.47], [109.82, 35.82], [109.75, 35.85], [109.68, 35.82], [109.53, 35.47], [109.0, 35.25], [108.47, 35.47], [108.32, 35.82], [107.97, 35.97]]]]}, "2023-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 35.97], [107.75, 36.5], [107.97, 37.03], [108.5, 37.25], [108.75, 37.15], [108.82, 37.18], [108.85, 37.25], [108.82, 37.32], [108.47, 37.47], [108.25, 38.0], [108.47, 38.53], [108.82, 38.68], [108.97, 39.03], [109.5, 39.25], [109.75, 39.15], [110.0, 39.25], [110.25, 39.15], [110.5, 39.25], [110.75, 39.15], [111.0, 39.25], [111.53, 39.03], [111.75, 38.5], [111.54, 38.0], [111.75, 37.5], [111.53, 36.97], [111.18, 36.82], [111.15, 36.75], [111.25, 36.5], [111.15, 36.25], [111.18, 36.18], [111.53, 36.03], [111.75, 35.5], [111.53, 34.97], [111.0, 34.75], [110.47, 34.97], [110.32, 35.32], [109.97, 35.47], [109.82, 35.82], [109.75, 35.85], [109.68, 35.82], [109.53, 35.47], [109.0, 35.25], [108.47, 35.47], [108.32, 35.82], [107.97, 35.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.317899451616086}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.862707677188542}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.342167234310068, -5.879438982408715, -5.255301529513645]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.82756774165631, -8.23327817489752, -7.689601252551483]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.6217268518667165, -4.931417968654515, -4.034978211044394]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.317899451616086, -5.879793929137804, -4.680783201548081]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1151541902348243, -1.8381440171210297, -1.4264107578107867]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4443424254984496, -2.097701869616562, -1.6041948373516797]}}