{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:09.306850", "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-Sep-03_to_2023-Sep-05_79.0_15.5"}, "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": 2023090000142}, "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 03 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 2023"}, "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": 56438.68031907697}, "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": 15.5}, "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": 79.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "79.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 77.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 80.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[77.0, 17.25], [77.25, 17.15], [77.5, 17.25], [77.75, 17.15], [77.82, 17.18], [77.97, 17.53], [78.5, 17.75], [79.03, 17.53], [79.18, 17.18], [79.25, 17.15], [79.5, 17.25], [80.03, 17.03], [80.25, 16.5], [80.15, 16.25], [80.18, 16.18], [80.53, 16.03], [80.75, 15.5], [80.53, 14.97], [80.0, 14.75], [79.75, 14.85], [79.5, 14.75], [79.25, 14.85], [79.0, 14.75], [78.75, 14.85], [78.5, 14.75], [78.25, 14.85], [78.0, 14.75], [77.75, 14.85], [77.5, 14.75], [76.97, 14.97], [76.82, 15.32], [76.47, 15.47], [76.25, 16.0], [76.35, 16.25], [76.25, 16.5], [76.47, 17.03], [77.0, 17.25]]]]}}, "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": {"2023-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.25, 16.5], [76.47, 17.03], [77.0, 17.25], [77.25, 17.15], [77.5, 17.25], [77.75, 17.15], [77.82, 17.18], [77.97, 17.53], [78.5, 17.75], [79.03, 17.53], [79.18, 17.18], [79.25, 17.15], [79.5, 17.25], [80.03, 17.03], [80.25, 16.5], [80.15, 16.25], [80.18, 16.18], [80.53, 16.03], [80.75, 15.5], [80.53, 14.97], [80.0, 14.75], [79.75, 14.85], [79.5, 14.75], [79.25, 14.85], [79.0, 14.75], [78.75, 14.85], [78.5, 14.75], [78.25, 14.85], [78.0, 14.75], [77.75, 14.85], [77.5, 14.75], [76.97, 14.97], [76.82, 15.32], [76.47, 15.47], [76.25, 16.0], [76.35, 16.25], [76.25, 16.5]]]]}, "2023-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.25, 16.5], [76.47, 17.03], [77.0, 17.25], [77.25, 17.15], [77.5, 17.25], [77.75, 17.15], [77.82, 17.18], [77.97, 17.53], [78.5, 17.75], [79.03, 17.53], [79.18, 17.18], [79.25, 17.15], [79.5, 17.25], [80.03, 17.03], [80.25, 16.5], [80.15, 16.25], [80.18, 16.18], [80.53, 16.03], [80.75, 15.5], [80.53, 14.97], [80.0, 14.75], [79.75, 14.85], [79.5, 14.75], [79.25, 14.85], [79.0, 14.75], [78.75, 14.85], [78.5, 14.75], [78.25, 14.85], [78.0, 14.75], [77.75, 14.85], [77.5, 14.75], [76.97, 14.97], [76.82, 15.32], [76.47, 15.47], [76.25, 16.0], [76.35, 16.25], [76.25, 16.5]]]]}, "2023-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[76.25, 16.5], [76.47, 17.03], [77.0, 17.25], [77.25, 17.15], [77.5, 17.25], [77.75, 17.15], [77.82, 17.18], [77.97, 17.53], [78.5, 17.75], [79.03, 17.53], [79.18, 17.18], [79.25, 17.15], [79.5, 17.25], [80.03, 17.03], [80.25, 16.5], [80.15, 16.25], [80.18, 16.18], [80.53, 16.03], [80.75, 15.5], [80.53, 14.97], [80.0, 14.75], [79.75, 14.85], [79.5, 14.75], [79.25, 14.85], [79.0, 14.75], [78.75, 14.85], [78.5, 14.75], [78.25, 14.85], [78.0, 14.75], [77.75, 14.85], [77.5, 14.75], [76.97, 14.97], [76.82, 15.32], [76.47, 15.47], [76.25, 16.0], [76.35, 16.25], [76.25, 16.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.619692627954066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.458315569651759}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.618058672566576, 25.108056157921055, 24.873367336531828]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.0861577796324, 23.46376468523073, 23.592464867195247]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0444485622620108, -2.5526238373707613, -2.7778743093225047]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4992177607211943, -3.0138322555546324, -3.619692627954066]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5354475032025388, -1.9266919645227378, -2.111368284960282]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7420535698295296, -2.184809740317441, -2.6528007280205803]}}