{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:15.182956", "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": "2017-Feb-21_to_2017-Feb-27_108.0_37.0"}, "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": 2017020000580}, "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": "February 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 68194.12329539367}, "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", "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": 37.0}, "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": 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": 106.75}, "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": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.0, 37.25], [108.53, 37.03], [108.75, 36.5], [108.53, 35.97], [108.0, 35.75], [107.47, 35.97], [107.25, 36.5], [107.47, 37.03], [108.0, 37.25]]]]}, "2017-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.47, 37.53], [106.82, 37.68], [106.85, 37.75], [106.75, 38.0], [106.85, 38.25], [106.75, 38.5], [106.85, 38.75], [106.75, 39.0], [106.85, 39.25], [106.75, 39.5], [106.97, 40.03], [107.5, 40.25], [108.03, 40.03], [108.18, 39.68], [108.25, 39.65], [108.32, 39.68], [108.47, 40.03], [109.0, 40.25], [109.53, 40.03], [109.68, 39.68], [110.03, 39.53], [110.25, 39.0], [110.15, 38.75], [110.25, 38.5], [110.15, 38.25], [110.25, 38.0], [110.03, 37.47], [109.68, 37.32], [109.53, 36.97], [109.18, 36.82], [109.03, 36.47], [108.68, 36.32], [108.53, 35.97], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.47, 35.97], [106.25, 36.5], [106.35, 36.75], [106.25, 37.0], [106.47, 37.53]]]]}, "2017-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.47, 37.53], [106.82, 37.68], [106.85, 37.75], [106.75, 38.0], [106.85, 38.25], [106.75, 38.5], [106.85, 38.75], [106.75, 39.0], [106.85, 39.25], [106.75, 39.5], [106.97, 40.03], [107.5, 40.25], [108.03, 40.03], [108.18, 39.68], [108.25, 39.65], [108.32, 39.68], [108.47, 40.03], [109.0, 40.25], [109.53, 40.03], [109.68, 39.68], [110.03, 39.53], [110.25, 39.0], [110.15, 38.75], [110.25, 38.5], [110.15, 38.25], [110.25, 38.0], [110.03, 37.47], [109.68, 37.32], [109.53, 36.97], [109.18, 36.82], [109.03, 36.47], [108.68, 36.32], [108.53, 35.97], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.47, 35.97], [106.25, 36.5], [106.35, 36.75], [106.25, 37.0], [106.47, 37.53]]]]}, "2017-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.47, 37.53], [106.82, 37.68], [106.85, 37.75], [106.75, 38.0], [106.85, 38.25], [106.75, 38.5], [106.85, 38.75], [106.75, 39.0], [106.85, 39.25], [106.75, 39.5], [106.97, 40.03], [107.5, 40.25], [108.03, 40.03], [108.18, 39.68], [108.25, 39.65], [108.32, 39.68], [108.47, 40.03], [109.0, 40.25], [109.53, 40.03], [109.68, 39.68], [110.03, 39.53], [110.25, 39.0], [110.15, 38.75], [110.25, 38.5], [110.15, 38.25], [110.25, 38.0], [110.03, 37.47], [109.68, 37.32], [109.53, 36.97], [109.18, 36.82], [109.03, 36.47], [108.68, 36.32], [108.53, 35.97], [108.0, 35.75], [107.75, 35.85], [107.5, 35.75], [107.25, 35.85], [107.0, 35.75], [106.47, 35.97], [106.25, 36.5], [106.35, 36.75], [106.25, 37.0], [106.47, 37.53]]]]}, "2017-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.47, 36.47], [106.25, 37.0], [106.47, 37.53], [107.0, 37.75], [107.25, 37.65], [107.32, 37.68], [107.47, 38.03], [107.82, 38.18], [107.97, 38.53], [108.32, 38.68], [108.47, 39.03], [109.0, 39.25], [109.53, 39.03], [109.75, 38.5], [109.65, 38.25], [109.75, 38.0], [109.53, 37.47], [109.18, 37.32], [109.15, 37.25], [109.25, 37.0], [109.03, 36.47], [108.5, 36.25], [108.25, 36.35], [108.0, 36.25], [107.75, 36.35], [107.5, 36.25], 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