{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:02.594980", "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": "2024-Sep-30_to_2024-Oct-02_116.5_38.0"}, "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": 2024090000671}, "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": "September 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2024"}, "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": 70478.17584743226}, "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": ["Bohai 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": 38.0}, "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": 116.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 119.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [118.03, 40.53], [118.18, 40.18], [118.25, 40.15], [118.5, 40.25], [118.75, 40.15], [119.0, 40.25], [119.53, 40.03], [119.75, 39.5], [119.53, 38.97], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.04, 38.0], [118.25, 37.5], [118.15, 37.25], [118.25, 37.0], [118.03, 36.47], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.47, 35.97], [116.32, 36.32], [116.25, 36.35], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.0, 36.25], [114.47, 36.47], [114.25, 37.0], [114.47, 37.53], [114.82, 37.68], [114.85, 37.75], [114.75, 38.0], [114.97, 38.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.85, 37.75], [114.75, 38.0], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [118.03, 40.53], [118.18, 40.18], [118.25, 40.15], [118.5, 40.25], [118.75, 40.15], [119.0, 40.25], [119.53, 40.03], [119.75, 39.5], [119.53, 38.97], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.04, 38.0], [118.25, 37.5], [118.15, 37.25], [118.25, 37.0], [118.03, 36.47], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.47, 35.97], [116.32, 36.32], [116.25, 36.35], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.0, 36.25], [114.47, 36.47], [114.25, 37.0], [114.47, 37.53], [114.82, 37.68], [114.85, 37.75]]]]}, "2024-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.85, 37.75], [114.75, 38.0], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [118.03, 40.53], [118.18, 40.18], [118.25, 40.15], [118.5, 40.25], [118.75, 40.15], [119.0, 40.25], [119.53, 40.03], [119.75, 39.5], [119.53, 38.97], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.04, 38.0], [118.25, 37.5], [118.15, 37.25], [118.25, 37.0], [118.03, 36.47], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.47, 35.97], [116.32, 36.32], [116.25, 36.35], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.0, 36.25], [114.47, 36.47], [114.25, 37.0], [114.47, 37.53], [114.82, 37.68], [114.85, 37.75]]]]}, "2024-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.85, 37.75], [114.75, 38.0], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [118.03, 40.53], [118.18, 40.18], [118.25, 40.15], [118.5, 40.25], [118.75, 40.15], [119.0, 40.25], [119.53, 40.03], [119.75, 39.5], [119.53, 38.97], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.04, 38.0], [118.25, 37.5], [118.15, 37.25], [118.25, 37.0], [118.03, 36.47], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.47, 35.97], [116.32, 36.32], [116.25, 36.35], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.0, 36.25], [114.47, 36.47], [114.25, 37.0], [114.47, 37.53], [114.82, 37.68], [114.85, 37.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.214339303378097}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.068837816189462}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.960367522842603, 13.1541889585298, 12.784780997791586]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.65016581217452, 11.410239156087243, 11.80484542846682]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.370740674238844, -4.898548627314142, -4.9372241470153995]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.214339303378097, -5.804919630686356, -5.676017417813341]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.80933139324349, -1.6105412327316984, -1.5991902504937152]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0442763291876247, -1.885359673536763, -1.8365967666891996]}}