{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:11.277812", "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-Oct-11_to_2021-Oct-14_109.0_24.0"}, "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": 2021100000403}, "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 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 14 2021"}, "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": 92648.47230054368}, "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": 24.0}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.82, 24.68], [108.97, 25.03], [109.5, 25.25], [109.8, 25.13], [109.88, 25.3], [109.47, 25.47], [109.25, 26.0], [109.35, 26.25], [109.25, 26.5], [109.47, 27.03], [110.0, 27.25], [110.25, 27.15], [110.5, 27.25], [110.75, 27.15], [111.0, 27.25], [111.53, 27.03], [111.68, 26.68], [111.75, 26.65], [112.0, 26.75], [112.53, 26.53], [112.75, 26.0], [112.65, 25.75], [112.68, 25.68], [113.03, 25.53], [113.25, 25.0], [113.15, 24.75], [113.25, 24.5], [113.03, 23.97], [112.68, 23.82], [112.53, 23.47], [112.0, 23.25], [111.75, 23.35], [111.68, 23.32], [111.65, 23.25], [111.75, 23.0], [111.53, 22.47], [111.18, 22.32], [111.03, 21.97], [110.5, 21.75], [109.97, 21.97], [109.75, 22.5], [109.85, 22.75], [109.8, 22.87], [109.5, 22.75], [108.97, 22.97], [108.82, 23.32], [108.47, 23.47], [108.25, 24.0], [108.47, 24.53], [108.82, 24.68]]]]}}, "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": 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"MultiPolygon", "coordinates": [[[[108.47, 23.47], [108.25, 24.0], [108.47, 24.53], [108.82, 24.68], [108.97, 25.03], [109.5, 25.25], [109.8, 25.13], [109.88, 25.3], [109.47, 25.47], [109.25, 26.0], [109.35, 26.25], [109.25, 26.5], [109.47, 27.03], [110.0, 27.25], [110.25, 27.15], [110.5, 27.25], [110.75, 27.15], [111.0, 27.25], [111.53, 27.03], [111.68, 26.68], [111.75, 26.65], [112.0, 26.75], [112.53, 26.53], [112.75, 26.0], [112.65, 25.75], [112.68, 25.68], [113.03, 25.53], [113.25, 25.0], [113.15, 24.75], [113.25, 24.5], [113.03, 23.97], [112.68, 23.82], [112.53, 23.47], [112.0, 23.25], [111.75, 23.35], [111.68, 23.32], [111.65, 23.25], [111.75, 23.0], [111.53, 22.47], [111.18, 22.32], [111.03, 21.97], [110.5, 21.75], [109.97, 21.97], [109.75, 22.5], [109.85, 22.75], [109.8, 22.88], [109.5, 22.75], [108.97, 22.97], [108.82, 23.32], [108.47, 23.47]]]]}, "2021-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.47, 23.47], [108.25, 24.0], [108.47, 24.53], 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