{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:47.551334", "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": "2023-Aug-06_to_2023-Aug-09_86.0_25.0"}, "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": 2023080000254}, "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 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2023"}, "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": 58632.452155174935}, "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": 25.0}, "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": 86.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "86.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.0}, "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": 24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.47, 23.97], [84.25, 24.5], [84.35, 24.75], [84.25, 25.0], [84.35, 25.25], [84.25, 25.5], [84.35, 25.75], [84.25, 26.0], [84.35, 26.25], [84.25, 26.5], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.18, 26.18], [87.25, 26.15], [87.5, 26.25], [88.03, 26.03], [88.25, 25.5], [88.15, 25.25], [88.25, 25.0], [88.03, 24.47], [87.5, 24.25], [87.25, 24.35], [87.0, 24.25], [86.75, 24.35], [86.68, 24.32], [86.53, 23.97], [86.0, 23.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 25.0], [84.47, 25.53], [85.0, 25.75], [85.25, 25.65], [85.5, 25.75], [85.75, 25.65], [86.0, 25.75], [86.53, 25.53], [86.75, 25.0], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.47, 23.97], [84.25, 24.5], [84.35, 24.75], [84.25, 25.0]]]]}, "2023-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 25.0], [84.35, 25.25], [84.25, 25.5], [84.35, 25.75], [84.25, 26.0], [84.35, 26.25], [84.25, 26.5], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.18, 26.18], [87.25, 26.15], [87.5, 26.25], [88.03, 26.03], [88.25, 25.5], [88.15, 25.25], [88.25, 25.0], [88.03, 24.47], [87.5, 24.25], [87.25, 24.35], [87.0, 24.25], [86.75, 24.35], [86.68, 24.32], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.47, 23.97], [84.25, 24.5], [84.35, 24.75], [84.25, 25.0]]]]}, "2023-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 25.0], [84.35, 25.25], [84.25, 25.5], [84.35, 25.75], [84.25, 26.0], [84.35, 26.25], [84.25, 26.5], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.18, 26.18], [87.25, 26.15], [87.5, 26.25], [88.03, 26.03], [88.25, 25.5], [88.15, 25.25], [88.25, 25.0], [88.03, 24.47], [87.5, 24.25], [87.25, 24.35], [87.0, 24.25], [86.75, 24.35], [86.68, 24.32], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.47, 23.97], [84.25, 24.5], [84.35, 24.75], [84.25, 25.0]]]]}, "2023-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.25, 25.5], [84.35, 25.75], [84.25, 26.0], [84.35, 26.25], [84.25, 26.5], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.18, 26.18], [87.25, 26.15], [87.5, 26.25], [88.03, 26.03], [88.25, 25.5], [88.15, 25.25], [88.25, 25.0], [88.03, 24.47], [87.5, 24.25], [87.25, 24.35], [87.0, 24.25], [86.75, 24.35], [86.5, 24.25], [86.25, 24.35], [86.18, 24.32], [86.03, 23.97], [85.5, 23.75], [84.97, 23.97], [84.82, 24.32], [84.47, 24.47], [84.25, 25.0], [84.35, 25.25], [84.25, 25.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.4451512180785926}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9185863468825737}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.309086045840274, 27.620197346686382, 27.512712665783113, 27.579221678859767]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.45605719387362, 26.019347966167118, 26.010246440768015, 26.663670367841462]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6709317674831539, -1.9054164737385826, -1.979228657099741, -1.9443235204541427]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8307392994714746, -2.2295604654980252, -2.4451512180785926, -2.4217739338414503]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5253133265891243, -1.731425566426321, -1.8260968420366042, -1.7322276737987328]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.675438241451948, -2.0463240304372987, -2.32666557311206, -2.1635073871323742]}}