{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:23.115199", "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-Oct-05_to_2025-Oct-08_67.5_35.0"}, "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": 2025100000180}, "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": "October 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 08 2025"}, "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": 55810.69457914603}, "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": ["Afghanistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.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": 35.0}, "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": 67.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "67.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 65.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 69.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[65.47, 36.03], [66.0, 36.25], [66.5, 36.04], [67.0, 36.25], [67.5, 36.04], [67.82, 36.18], [67.97, 36.53], [68.5, 36.75], [68.75, 36.65], [69.0, 36.75], [69.53, 36.53], [69.75, 36.0], [69.63, 35.7], [70.03, 35.53], [70.25, 35.0], [70.03, 34.47], [69.5, 34.25], [69.2, 34.38], [69.15, 34.25], [69.25, 34.0], [69.03, 33.47], [68.5, 33.25], [68.25, 33.35], [68.0, 33.25], [67.75, 33.35], [67.5, 33.25], [66.97, 33.47], [66.82, 33.82], [66.75, 33.85], [66.5, 33.75], [66.25, 33.85], [66.0, 33.75], [65.75, 33.85], [65.5, 33.75], [64.97, 33.97], [64.75, 34.5], [64.97, 35.03], [65.38, 35.2], [65.25, 35.5], [65.47, 36.03]]]]}, "2025-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[65.47, 36.03], [66.0, 36.25], [66.5, 36.04], [67.0, 36.25], [67.5, 36.04], [67.82, 36.18], [67.97, 36.53], [68.5, 36.75], [68.75, 36.65], [69.0, 36.75], [69.53, 36.53], [69.75, 36.0], [69.63, 35.7], [70.03, 35.53], [70.25, 35.0], [70.03, 34.47], [69.68, 34.32], [69.53, 33.97], [69.18, 33.82], [69.03, 33.47], [68.5, 33.25], [68.25, 33.35], [68.0, 33.25], [67.75, 33.35], [67.5, 33.25], [66.97, 33.47], [66.82, 33.82], [66.75, 33.85], [66.5, 33.75], [66.25, 33.85], [66.0, 33.75], [65.75, 33.85], [65.5, 33.75], [64.97, 33.97], [64.75, 34.5], [64.97, 35.03], [65.38, 35.2], [65.25, 35.5], [65.47, 36.03]]]]}, "2025-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[65.47, 36.03], [66.0, 36.25], [66.5, 36.04], [67.0, 36.25], [67.5, 36.04], [67.82, 36.18], [67.97, 36.53], [68.5, 36.75], [68.75, 36.65], [69.0, 36.75], [69.53, 36.53], [69.75, 36.0], [69.63, 35.7], [70.03, 35.53], [70.25, 35.0], [70.03, 34.47], [69.68, 34.32], [69.53, 33.97], [69.18, 33.82], [69.03, 33.47], [68.5, 33.25], [68.25, 33.35], [68.0, 33.25], [67.75, 33.35], [67.5, 33.25], [66.97, 33.47], [66.82, 33.82], [66.75, 33.85], [66.5, 33.75], [66.25, 33.85], [66.0, 33.75], [65.75, 33.85], [65.5, 33.75], [64.97, 33.97], [64.75, 34.5], [64.97, 35.03], [65.38, 35.2], [65.25, 35.5], [65.47, 36.03]]]]}, "2025-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[69.5, 35.75], [70.03, 35.53], [70.25, 35.0], [70.03, 34.47], [69.68, 34.32], [69.53, 33.97], [69.0, 33.75], [68.47, 33.97], [68.25, 34.5], [68.47, 35.03], [68.82, 35.18], [68.97, 35.53], [69.5, 35.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.47905669420112}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.143845703277071}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.0851642790295273, 2.3160664182721007, 3.439676943692291, 9.721877034505269]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.9380872090657135, -2.7074302673339616, -1.8185091654459598, 8.533603922526083]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.136206202259165, -5.903170559138775, -4.540264006499448, -3.5108857140401994]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.768093945059547, -7.47905669420112, -6.041082351906482, -3.5369021181260223]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8890379226429115, -2.205894199658305, -1.7107477403218951, -1.55295715621681]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3616703531076335, -2.617315897269487, -2.1153448933715757, -1.6058937576749275]}}