{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:57.797958", "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": "2022-Jan-28_to_2022-Jan-31_100.0_34.5"}, "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": 2022010001049}, "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 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2022"}, "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": 51321.84916722194}, "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", "Tibetan-Plateau"]}, "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": 34.5}, "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": 100.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.0\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": 102.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, 35.53], [99.5, 35.75], [99.75, 35.65], [100.0, 35.75], [100.25, 35.65], [100.5, 35.75], [100.75, 35.65], [101.0, 35.75], [101.53, 35.53], [101.75, 35.0], [101.65, 34.75], [101.68, 34.68], [102.03, 34.53], [102.25, 34.0], [102.15, 33.75], [102.25, 33.5], [102.15, 33.25], [102.25, 33.0], [102.15, 32.75], [102.25, 32.5], [102.03, 31.97], [101.5, 31.75], [101.25, 31.85], [101.0, 31.75], [100.47, 31.97], [100.25, 32.5], [100.46, 33.0], [100.32, 33.32], [100.25, 33.35], [100.0, 33.25], [99.47, 33.47], [99.32, 33.82], [98.97, 33.97], [98.75, 34.5], [98.85, 34.75], [98.75, 35.0], [98.97, 35.53]]]]}, "2022-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, 35.53], [99.5, 35.75], [99.75, 35.65], [100.0, 35.75], [100.25, 35.65], [100.5, 35.75], [100.75, 35.65], [101.0, 35.75], [101.53, 35.53], [101.75, 35.0], [101.65, 34.75], [101.68, 34.68], [102.03, 34.53], [102.25, 34.0], [102.15, 33.75], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [103.03, 33.53], [103.25, 33.0], [103.03, 32.47], [102.68, 32.32], [102.53, 31.97], [102.0, 31.75], [101.75, 31.85], [101.5, 31.75], [101.25, 31.85], [101.0, 31.75], [100.47, 31.97], [100.25, 32.5], [100.46, 33.0], [100.32, 33.32], [100.25, 33.35], [100.0, 33.25], [99.47, 33.47], [99.32, 33.82], [98.97, 33.97], [98.75, 34.5], [98.85, 34.75], [98.75, 35.0], [98.97, 35.53]]]]}, "2022-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, 35.53], [99.5, 35.75], [99.75, 35.65], [100.0, 35.75], [100.25, 35.65], [100.5, 35.75], [100.75, 35.65], [101.0, 35.75], [101.53, 35.53], [101.75, 35.0], [101.65, 34.75], [101.68, 34.68], [102.03, 34.53], [102.25, 34.0], [102.15, 33.75], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [103.03, 33.53], [103.25, 33.0], [103.03, 32.47], [102.68, 32.32], [102.53, 31.97], [102.0, 31.75], [101.75, 31.85], [101.5, 31.75], [101.25, 31.85], [101.0, 31.75], [100.47, 31.97], [100.25, 32.5], [100.46, 33.0], [100.32, 33.32], [100.25, 33.35], [100.0, 33.25], [99.47, 33.47], [99.32, 33.82], [98.97, 33.97], [98.75, 34.5], [98.85, 34.75], [98.75, 35.0], [98.97, 35.53]]]]}, "2022-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.47, 35.03], [100.0, 35.25], [100.25, 35.15], [100.5, 35.25], [100.75, 35.15], [101.0, 35.25], [101.53, 35.03], [101.68, 34.68], [102.03, 34.53], [102.25, 34.0], [102.15, 33.75], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [103.03, 33.53], [103.25, 33.0], [103.03, 32.47], [102.68, 32.32], [102.53, 31.97], [102.0, 31.75], [101.75, 31.85], [101.5, 31.75], [101.25, 31.85], [101.0, 31.75], [100.47, 31.97], [100.25, 32.5], [100.46, 33.0], [100.32, 33.32], [100.25, 33.35], [100.0, 33.25], [99.47, 33.47], [99.25, 34.0], [99.35, 34.25], [99.25, 34.5], [99.47, 35.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.343014915882009}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.341358704825568}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.998653107309707, -22.3067529249451, -21.289897617940994, -20.124877258012702]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.79520101090438, -26.106460642837277, -25.712227198919635, -22.96750050945127]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.841335458824498, -8.32566145405591, -7.4814673297972405, -6.408836551357424]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.559331735339299, -11.343014915882009, -11.0749151488466, -8.452792953998653]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8079257336879324, -2.1772900062499714, -1.9501408550034292, -1.6785976070261828]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2918786144831946, -2.829454129489633, -2.84835897860227, -2.0840700705961943]}}