{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:01.657546", "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": "2013-Apr-15_to_2013-Apr-19_107.0_43.5"}, "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": 2013040000564}, "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": "April 15 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 19 2013"}, "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": 64849.277397724254}, "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", "Mongolia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.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": 43.5}, "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": 107.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "107.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 105.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 43.97], [107.75, 44.5], [107.97, 45.03], [108.5, 45.25], [108.75, 45.15], [109.0, 45.25], [109.53, 45.03], [109.75, 44.5], [109.53, 43.97], [109.0, 43.75], [108.75, 43.85], [108.5, 43.75], [107.97, 43.97]]]]}, "2013-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.47, 44.53], [107.0, 44.75], [107.25, 44.65], [107.5, 44.75], [107.75, 44.65], [107.82, 44.68], [107.97, 45.03], [108.5, 45.25], [108.75, 45.15], [109.0, 45.25], [109.53, 45.03], [109.75, 44.5], [109.53, 43.97], [109.18, 43.82], [109.03, 43.47], [108.5, 43.25], [108.25, 43.35], [108.18, 43.32], [108.03, 42.97], [107.5, 42.75], [107.25, 42.85], [107.0, 42.75], [106.47, 42.97], [106.25, 43.5], [106.35, 43.75], [106.25, 44.0], [106.47, 44.53]]]]}, "2013-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.75, 42.5], [104.97, 43.03], [105.32, 43.18], [105.46, 43.5], [105.25, 44.0], [105.35, 44.25], [105.25, 44.5], [105.47, 45.03], [106.0, 45.25], [106.25, 45.15], [106.5, 45.25], [106.75, 45.15], [107.0, 45.25], [107.25, 45.15], 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