{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:34.920654", "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": "2021-Sep-26_to_2021-Oct-01_89.0_30.0"}, "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": 2021090000908}, "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 26 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 01 2021"}, "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": 77316.62143235933}, "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": 30.0}, "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": 89.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "89.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 87.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 94.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[88.5, 31.25], [88.75, 31.15], [89.0, 31.25], [89.25, 31.15], [89.5, 31.25], [90.0, 31.04], [90.5, 31.25], [90.75, 31.15], 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describing the boundary of the event at each time step", "value": {"2021-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.47, 31.03], [88.0, 31.25], [88.25, 31.15], [88.5, 31.25], [88.75, 31.15], [89.0, 31.25], [89.25, 31.15], [89.5, 31.25], [90.03, 31.03], [90.18, 30.68], [90.25, 30.65], [90.32, 30.68], [90.47, 31.03], [91.0, 31.25], [91.25, 31.15], [91.5, 31.25], [91.75, 31.15], [92.0, 31.25], [92.43, 31.07], [92.25, 31.5], [92.47, 32.03], [93.0, 32.25], [93.53, 32.03], [93.75, 31.5], [93.53, 30.97], [93.0, 30.75], [92.57, 30.93], [92.75, 30.5], [92.53, 29.97], [92.0, 29.75], [91.75, 29.85], [91.5, 29.75], [91.25, 29.85], [91.18, 29.82], [91.03, 29.47], [90.5, 29.25], [90.25, 29.35], [90.0, 29.25], [89.75, 29.35], [89.5, 29.25], [89.25, 29.35], [89.0, 29.25], [88.75, 29.35], [88.5, 29.25], [88.25, 29.35], [88.0, 29.25], [87.75, 29.35], [87.5, 29.25], [86.97, 29.47], [86.75, 30.0], [86.97, 30.53], [87.32, 30.68], [87.47, 31.03]]]]}, 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