{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:53.233102", "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-Aug-25_to_2021-Aug-28_103.5_31.0"}, "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": 2021080001109}, "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": "August 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 28 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": 74151.9390025573}, "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": 31.0}, "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": 103.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 105.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[98.85, 30.75], [98.75, 31.0], [98.97, 31.53], [99.5, 31.75], [99.75, 31.65], [100.0, 31.75], [100.25, 31.65], [100.5, 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"IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "E.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.5, 29.75], [98.97, 29.97], [98.75, 30.5], [98.97, 31.03], [99.5, 31.25], [99.75, 31.15], [100.0, 31.25], [100.25, 31.15], [100.32, 31.18], [100.47, 31.53], [101.0, 31.75], [101.25, 31.65], [101.5, 31.75], [102.03, 31.53], [102.25, 31.0], [102.15, 30.75], [102.18, 30.68], [102.25, 30.65], [102.32, 30.68], [102.47, 31.03], [102.82, 31.18], [102.85, 31.25], [102.75, 31.5], [102.97, 32.03], [103.32, 32.18], [103.47, 32.53], [103.82, 32.68], [103.97, 33.03], [104.32, 33.18], [104.47, 33.53], [105.0, 33.75], [105.53, 33.53], [105.75, 33.0], [105.65, 32.75], [105.75, 32.5], [105.65, 32.25], [105.75, 32.0], [105.53, 31.47], [105.18, 31.32], [105.03, 30.97], [104.5, 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evolution of mean standardized t2m anomalies.", "value": [-1.9346010153051276, -2.7862493894417075, -1.6270930615990185, -1.7206758639939852]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3001362291179404, -3.986709897627198, -2.4055086508158245, -2.1212118984067896]}}