{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:34.425196", "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-Dec-25_to_2021-Dec-27_103.0_38.0"}, "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": 2021120000859}, "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": "December 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 78926.7764627346}, "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.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": 38.0}, "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": 103.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.25}, "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": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 40.75], [98.75, 41.0], [98.97, 41.53], [99.5, 41.75], 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[98.97, 39.47], [98.75, 40.0], [98.85, 40.25], [98.75, 40.5], [98.85, 40.75]]]]}, "2021-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 40.75], [98.75, 41.0], [98.97, 41.53], [99.5, 41.75], [100.03, 41.53], [100.25, 41.0], [100.15, 40.75], [100.18, 40.68], [100.25, 40.65], [100.5, 40.75], [101.03, 40.53], [101.18, 40.18], [101.25, 40.15], [101.5, 40.25], [102.0, 40.04], [102.5, 40.25], [102.75, 40.15], [103.0, 40.25], [103.25, 40.15], [103.32, 40.18], [103.47, 40.53], [104.0, 40.75], [104.53, 40.53], [104.68, 40.18], [104.75, 40.15], [105.0, 40.25], [105.25, 40.15], [105.32, 40.18], [105.47, 40.53], [106.0, 40.75], [106.25, 40.65], [106.5, 40.75], [107.03, 40.53], [107.25, 40.0], [107.03, 39.47], [106.68, 39.32], [106.53, 38.97], [106.0, 38.75], [105.75, 38.85], [105.68, 38.82], [105.53, 38.47], [105.0, 38.25], [104.75, 38.35], [104.68, 38.32], [104.65, 38.25], [104.75, 38.0], [104.53, 37.47], [104.0, 37.25], [103.75, 37.35], [103.5, 37.25], [103.25, 37.35], [103.0, 37.25], [102.47, 37.47], [102.32, 37.82], [101.97, 37.97], [101.82, 38.32], [101.47, 38.47], [101.32, 38.82], [101.25, 38.85], [101.0, 38.75], [100.5, 38.96], [100.0, 38.75], [99.47, 38.97], [99.32, 39.32], [98.97, 39.47], [98.75, 40.0], [98.85, 40.25], [98.75, 40.5], [98.85, 40.75]]]]}, "2021-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 40.75], [98.75, 41.0], [98.97, 41.53], [99.5, 41.75], [100.03, 41.53], [100.25, 41.0], [100.15, 40.75], [100.18, 40.68], [100.25, 40.65], [100.5, 40.75], [101.03, 40.53], [101.18, 40.18], [101.25, 40.15], [101.5, 40.25], [102.0, 40.04], [102.5, 40.25], [102.75, 40.15], [103.0, 40.25], [103.25, 40.15], [103.32, 40.18], [103.47, 40.53], [104.0, 40.75], [104.53, 40.53], [104.68, 40.18], [104.75, 40.15], [105.0, 40.25], [105.25, 40.15], [105.32, 40.18], [105.47, 40.53], [106.0, 40.75], [106.25, 40.65], [106.5, 40.75], [107.03, 40.53], [107.25, 40.0], [107.03, 39.47], [106.68, 39.32], [106.53, 38.97], [106.0, 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{"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.739587970880052, -18.26191970740942, -16.45153855625557]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.380644140546356, -8.153093659461616, -6.496180548427381]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.119452549401103, -9.094870522682925, -7.840932103005173]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8072462363729227, -1.999200818761207, -1.591992228732299]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1998083155233363, 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