{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:12.938589", "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-Apr-24_to_2021-Apr-27_104.0_38.5"}, "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": 2021040000990}, "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 24 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 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": 112916.82927195636}, "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": 38.5}, "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": 104.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 106.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "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": {"2021-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.85, 38.75], [102.75, 39.0], [102.97, 39.53], [103.32, 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40.25], [105.03, 40.03], [105.18, 39.68], [105.53, 39.53], [105.68, 39.18], [105.75, 39.15], [106.0, 39.25], [106.53, 39.03], [106.68, 38.68], [107.03, 38.53], [107.25, 38.0], [107.15, 37.75], [107.25, 37.5], [107.03, 36.97], [106.68, 36.82], [106.65, 36.75], [106.75, 36.5], [106.53, 35.97], [106.0, 35.75], [105.75, 35.85], [105.68, 35.82], [105.53, 35.47], [105.18, 35.32], [105.03, 34.97], [104.5, 34.75], [104.25, 34.85], [104.0, 34.75], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.82, 35.32], [102.47, 35.47], [102.25, 36.0], [102.35, 36.25], [102.25, 36.5], [102.47, 37.03]]]]}, "2021-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.47, 37.03], [102.82, 37.18], [102.96, 37.5], [102.75, 38.0], [102.85, 38.25], [102.75, 38.5], [102.85, 38.75], [102.75, 39.0], [102.97, 39.53], [103.32, 39.68], [103.47, 40.03], [104.0, 40.25], [104.25, 40.15], [104.5, 40.25], [105.03, 40.03], [105.18, 39.68], [105.53, 39.53], [105.68, 39.18], [105.75, 39.15], [106.0, 39.25], [106.53, 39.03], [106.68, 38.68], [107.03, 38.53], [107.25, 38.0], [107.15, 37.75], [107.25, 37.5], [107.03, 36.97], [106.68, 36.82], [106.65, 36.75], [106.75, 36.5], [106.53, 35.97], [106.0, 35.75], [105.75, 35.85], [105.68, 35.82], [105.53, 35.47], [105.18, 35.32], [105.03, 34.97], [104.5, 34.75], [104.25, 34.85], [104.0, 34.75], [103.75, 34.85], [103.5, 34.75], [102.97, 34.97], [102.82, 35.32], [102.47, 35.47], [102.25, 36.0], [102.35, 36.25], [102.25, 36.5], [102.47, 37.03]]]]}, "2021-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.47, 37.03], [102.82, 37.18], [102.96, 37.5], [102.75, 38.0], [102.85, 38.25], [102.75, 38.5], [102.85, 38.75], [102.75, 39.0], [102.97, 39.53], [103.32, 39.68], [103.47, 40.03], [104.0, 40.25], [104.25, 40.15], [104.5, 40.25], [105.03, 40.03], [105.18, 39.68], [105.53, 39.53], [105.68, 39.18], [105.75, 39.15], [106.0, 39.25], [106.53, 39.03], [106.68, 38.68], [107.03, 38.53], [107.25, 38.0], [107.15, 37.75], [107.25, 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