{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:00.208913", "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-Aug-22_to_2025-Aug-24_85.5_22.5"}, "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": 2025080000762}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 24 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": 100070.20544966901}, "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": ["India"]}, "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": 22.5}, "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": 85.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "85.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 83.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 87.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[82.47, 22.53], [82.82, 22.68], [82.97, 23.03], [83.5, 23.25], [83.75, 23.15], [84.0, 23.25], [84.25, 23.15], [84.32, 23.18], [84.47, 23.53], [85.0, 23.75], [85.25, 23.65], [85.32, 23.68], [85.47, 24.03], [86.0, 24.25], [86.25, 24.15], [86.5, 24.25], [86.75, 24.15], [87.0, 24.25], [87.53, 24.03], [87.68, 23.68], [88.03, 23.53], [88.25, 23.0], [88.15, 22.75], [88.25, 22.5], [88.15, 22.25], [88.25, 22.0], [88.03, 21.47], [87.5, 21.25], [87.25, 21.35], [87.18, 21.32], [87.03, 20.97], [86.5, 20.75], [86.25, 20.85], [86.0, 20.75], [85.75, 20.85], [85.5, 20.75], [85.25, 20.85], [85.0, 20.75], [84.75, 20.85], [84.5, 20.75], [84.25, 20.85], [84.0, 20.75], [83.75, 20.85], [83.5, 20.75], [82.97, 20.97], [82.82, 21.32], [82.47, 21.47], [82.25, 22.0], [82.47, 22.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 21.47], [82.25, 22.0], [82.47, 22.53], [82.82, 22.68], [82.97, 23.03], [83.5, 23.25], [83.75, 23.15], [84.0, 23.25], [84.25, 23.15], [84.32, 23.18], [84.47, 23.53], [85.0, 23.75], [85.25, 23.65], [85.32, 23.68], [85.47, 24.03], [86.0, 24.25], [86.25, 24.15], [86.5, 24.25], [86.75, 24.15], [87.0, 24.25], [87.53, 24.03], [87.68, 23.68], [88.03, 23.53], [88.25, 23.0], [88.15, 22.75], [88.25, 22.5], [88.15, 22.25], [88.25, 22.0], [88.03, 21.47], [87.5, 21.25], [87.25, 21.35], [87.18, 21.32], [87.03, 20.97], [86.5, 20.75], [86.25, 20.85], [86.0, 20.75], [85.75, 20.85], [85.5, 20.75], [85.25, 20.85], [85.0, 20.75], [84.75, 20.85], [84.5, 20.75], [84.25, 20.85], [84.0, 20.75], [83.75, 20.85], [83.5, 20.75], [82.97, 20.97], [82.82, 21.32], [82.47, 21.47]]]]}, "2025-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 21.47], [82.25, 22.0], [82.47, 22.53], [82.82, 22.68], [82.97, 23.03], [83.5, 23.25], [83.75, 23.15], [84.0, 23.25], [84.25, 23.15], [84.32, 23.18], [84.47, 23.53], [85.0, 23.75], [85.25, 23.65], [85.32, 23.68], [85.47, 24.03], [86.0, 24.25], [86.25, 24.15], [86.5, 24.25], [86.75, 24.15], [87.0, 24.25], [87.53, 24.03], [87.68, 23.68], [88.03, 23.53], [88.25, 23.0], [88.15, 22.75], [88.25, 22.5], [88.15, 22.25], [88.25, 22.0], [88.03, 21.47], [87.5, 21.25], [87.25, 21.35], [87.18, 21.32], [87.03, 20.97], [86.5, 20.75], [86.25, 20.85], [86.0, 20.75], [85.75, 20.85], [85.5, 20.75], [85.25, 20.85], [85.0, 20.75], [84.75, 20.85], [84.5, 20.75], [84.25, 20.85], [84.0, 20.75], [83.75, 20.85], [83.5, 20.75], [82.97, 20.97], [82.82, 21.32], [82.47, 21.47]]]]}, "2025-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 21.47], [82.25, 22.0], [82.47, 22.53], [82.82, 22.68], [82.97, 23.03], [83.5, 23.25], [83.75, 23.15], [84.0, 23.25], [84.25, 23.15], [84.32, 23.18], [84.47, 23.53], [85.0, 23.75], [85.25, 23.65], [85.32, 23.68], [85.47, 24.03], [86.0, 24.25], [86.25, 24.15], [86.5, 24.25], [86.75, 24.15], [87.0, 24.25], [87.53, 24.03], [87.68, 23.68], [88.03, 23.53], [88.25, 23.0], [88.15, 22.75], [88.25, 22.5], [88.15, 22.25], [88.25, 22.0], [88.03, 21.47], [87.5, 21.25], [87.25, 21.35], [87.18, 21.32], [87.03, 20.97], [86.5, 20.75], [86.25, 20.85], [86.0, 20.75], [85.75, 20.85], [85.5, 20.75], [85.25, 20.85], [85.0, 20.75], [84.75, 20.85], [84.5, 20.75], [84.25, 20.85], [84.0, 20.75], [83.75, 20.85], [83.5, 20.75], [82.97, 20.97], [82.82, 21.32], [82.47, 21.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.479596269505862}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9379435508865672}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.473120771135598, 25.256210908435662, 25.302879006522005]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.86778920491537, 23.697254435221396, 23.71476516723635]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7482384115057958, -2.039991621371171, -2.0256006197827348]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.112889966193393, -2.479596269505862, -2.4488901689031763]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.793657532081982, -2.088702824172932, -2.146771581914948]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.255565715250277, -2.5292443017608988, -2.59353039893308]}}