{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:54.345903", "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": "2025-Sep-24_to_2025-Sep-26_85.0_41.0"}, "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": 2025090000552}, "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": "September 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 26 2025"}, "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": 58618.48730314043}, "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": 41.0}, "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": 85.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "85.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 83.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 87.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 41.03], [83.32, 41.18], [83.47, 41.53], [84.0, 41.75], [84.25, 41.65], [84.32, 41.68], [84.47, 42.03], [85.0, 42.25], [85.25, 42.15], [85.5, 42.25], [85.75, 42.15], [86.0, 42.25], [86.25, 42.15], [86.5, 42.25], [86.75, 42.15], [87.0, 42.25], [87.53, 42.03], [87.75, 41.5], [87.53, 40.97], [87.18, 40.82], [87.15, 40.75], [87.25, 40.5], [87.03, 39.97], [86.68, 39.82], [86.53, 39.47], [86.0, 39.25], [85.75, 39.35], [85.68, 39.32], [85.53, 38.97], [85.0, 38.75], [84.47, 38.97], [84.32, 39.32], [84.25, 39.35], [84.0, 39.25], [83.75, 39.35], [83.5, 39.25], [82.97, 39.47], [82.75, 40.0], [82.85, 40.25], [82.75, 40.5], [82.97, 41.03]]]]}, "2025-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 41.03], [83.32, 41.18], [83.47, 41.53], [84.0, 41.75], [84.25, 41.65], [84.32, 41.68], [84.47, 42.03], [85.0, 42.25], [85.25, 42.15], [85.5, 42.25], [85.75, 42.15], [86.0, 42.25], [86.25, 42.15], [86.5, 42.25], [86.75, 42.15], [87.0, 42.25], [87.53, 42.03], [87.75, 41.5], [87.53, 40.97], [87.18, 40.82], [87.15, 40.75], [87.25, 40.5], [87.03, 39.97], [86.68, 39.82], [86.53, 39.47], [86.0, 39.25], [85.75, 39.35], [85.68, 39.32], [85.53, 38.97], [85.0, 38.75], [84.47, 38.97], [84.32, 39.32], [84.25, 39.35], [84.0, 39.25], [83.75, 39.35], [83.5, 39.25], [82.97, 39.47], [82.75, 40.0], [82.85, 40.25], [82.75, 40.5], [82.97, 41.03]]]]}, "2025-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 41.03], [83.32, 41.18], [83.47, 41.53], [84.0, 41.75], [84.25, 41.65], [84.32, 41.68], [84.47, 42.03], [85.0, 42.25], [85.25, 42.15], [85.5, 42.25], [85.75, 42.15], [86.0, 42.25], [86.25, 42.15], [86.5, 42.25], [86.75, 42.15], [87.0, 42.25], [87.53, 42.03], [87.75, 41.5], [87.53, 40.97], [87.18, 40.82], [87.15, 40.75], [87.25, 40.5], [87.03, 39.97], [86.68, 39.82], [86.53, 39.47], [86.0, 39.25], [85.75, 39.35], [85.68, 39.32], [85.53, 38.97], [85.0, 38.75], [84.47, 38.97], [84.32, 39.32], [84.25, 39.35], [84.0, 39.25], [83.75, 39.35], [83.5, 39.25], [82.97, 39.47], [82.75, 40.0], [82.85, 40.25], [82.75, 40.5], [82.97, 41.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.60646086232282}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.92995640678861}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.076961110432933, 13.781805928548238, 15.070333506266309]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.620392100016318, 11.65851491292318, 12.887156422932946]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.768845565774723, -5.78298800716206, -4.238035647429046]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.941374481671119, -6.60646086232282, -5.36643846098292]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.895193846548264, -2.2729586869977454, -1.6747338707317025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.331003853809886, -2.6379559915138837, -2.1370521432978955]}}