{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:59.282176", "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": "2018-Sep-09_to_2018-Sep-13_108.5_29.5"}, "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": 2018090000406}, "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 09 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 124504.50904428939}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 29.5}, "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": 108.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 104.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.5, 29.75], [105.03, 29.53], [105.25, 29.0], [105.03, 28.47], [104.5, 28.25], [103.97, 28.47], [103.75, 29.0], [103.97, 29.53], [104.5, 29.75]]]]}, "2018-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.75, 29.0], [103.97, 29.53], [104.5, 29.75], [104.75, 29.65], [104.82, 29.68], [104.97, 30.03], [105.5, 30.25], [105.75, 30.15], [105.82, 30.18], [105.97, 30.53], [106.5, 30.75], [106.75, 30.65], [106.82, 30.68], [106.97, 31.03], [107.5, 31.25], [108.03, 31.03], [108.18, 30.68], [108.25, 30.65], [108.5, 30.75], [108.75, 30.65], [109.0, 30.75], [109.25, 30.65], [109.5, 30.75], [110.03, 30.53], [110.25, 30.0], [110.15, 29.75], [110.25, 29.5], [110.03, 28.97], [109.68, 28.82], [109.53, 28.47], [109.18, 28.32], [109.15, 28.25], [109.25, 28.0], [109.03, 27.47], [108.5, 27.25], [108.25, 27.35], [108.18, 27.32], [108.03, 26.97], [107.5, 26.75], [107.25, 26.85], [107.0, 26.75], [106.75, 26.85], [106.5, 26.75], [106.25, 26.85], [106.18, 26.82], [106.03, 26.47], [105.5, 26.25], [104.97, 26.47], [104.75, 27.0], [104.85, 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27.0], [104.85, 27.25], [104.75, 27.5], [104.88, 27.8], [104.47, 27.97], [104.32, 28.32], [103.97, 28.47], [103.75, 29.0]]]]}, "2018-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.47, 29.53], [104.82, 29.68], [104.97, 30.03], [105.5, 30.25], [105.75, 30.15], [105.82, 30.18], [105.97, 30.53], [106.5, 30.75], [106.75, 30.65], [106.82, 30.68], [106.97, 31.03], [107.5, 31.25], [108.03, 31.03], [108.18, 30.68], [108.25, 30.65], [108.5, 30.75], [108.75, 30.65], [109.0, 30.75], [109.25, 30.65], [109.5, 30.75], [110.03, 30.53], [110.25, 30.0], [110.15, 29.75], [110.25, 29.5], [110.03, 28.97], [109.68, 28.82], [109.53, 28.47], [109.18, 28.32], [109.15, 28.25], [109.25, 28.0], [109.03, 27.47], [108.5, 27.25], [108.25, 27.35], [108.18, 27.32], [108.03, 26.97], [107.5, 26.75], [107.25, 26.85], [107.0, 26.75], [106.75, 26.85], [106.5, 26.75], [106.25, 26.85], [106.18, 26.82], [106.03, 26.47], [105.5, 26.25], [104.97, 26.47], [104.75, 27.0], [104.85, 27.25], [104.75, 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