{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:01.070266", "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": "2025-Jan-25_to_2025-Jan-30_108.0_35.5"}, "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": 2025010000675}, "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": "January 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 30 2025"}, "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": 59789.200151825484}, "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": 35.5}, "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": 108.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 109.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.0, 34.25], [107.75, 34.35], [107.5, 34.25], [106.97, 34.47], [106.75, 35.0], [106.85, 35.25], [106.82, 35.32], [106.47, 35.47], [106.32, 35.82], [106.25, 35.85], [106.0, 35.75], [105.47, 35.97], [105.25, 36.5], [105.35, 36.75], [105.25, 37.0], [105.47, 37.53], [105.82, 37.68], [105.97, 38.03], [106.5, 38.25], [106.75, 38.15], [107.0, 38.25], [107.25, 38.15], [107.5, 38.25], [108.03, 38.03], [108.18, 37.68], [108.53, 37.53], [108.75, 37.0], [108.65, 36.75], [108.68, 36.68], [109.03, 36.53], [109.18, 36.18], [109.53, 36.03], [109.75, 35.5], [109.53, 34.97], [109.18, 34.82], [109.03, 34.47], [108.5, 34.25], [108.25, 34.35], [108.0, 34.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 35.5], [107.47, 36.03], [108.0, 36.25], [108.53, 36.03], [108.75, 35.5], [108.65, 35.25], [108.75, 35.0], [108.53, 34.47], [108.0, 34.25], [107.47, 34.47], [107.25, 35.0], [107.35, 35.25], [107.25, 35.5]]]]}, "2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.25, 37.0], [105.47, 37.53], [105.82, 37.68], [105.97, 38.03], [106.5, 38.25], [106.75, 38.15], [107.0, 38.25], [107.25, 38.15], [107.5, 38.25], [108.03, 38.03], [108.18, 37.68], [108.53, 37.53], [108.75, 37.0], [108.65, 36.75], [108.68, 36.68], [109.03, 36.53], [109.18, 36.18], [109.53, 36.03], [109.75, 35.5], [109.53, 34.97], [109.18, 34.82], [109.03, 34.47], [108.5, 34.25], [108.25, 34.35], [108.0, 34.25], [107.75, 34.35], [107.5, 34.25], [106.97, 34.47], [106.75, 35.0], [106.85, 35.25], [106.82, 35.32], [106.47, 35.47], [106.32, 35.82], [106.25, 35.85], [106.0, 35.75], [105.47, 35.97], [105.25, 36.5], [105.35, 36.75], [105.25, 37.0]]]]}, "2025-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.25, 37.0], [105.47, 37.53], [105.82, 37.68], [105.97, 38.03], [106.5, 38.25], [106.75, 38.15], 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