{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:14.346345", "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-23_to_2023-Sep-26_64.5_30.5"}, "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": 2023090000443}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 26 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": 102595.50083902819}, "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", "Iran, Islamic Republic of", "Pakistan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "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": 30.5}, "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": 64.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "64.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 61.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 65.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[61.75, 28.65], [61.82, 28.68], [61.85, 28.75], [61.75, 29.0], [61.85, 29.25], [61.75, 29.5], [61.97, 30.03], [62.32, 30.18], [62.47, 30.53], [63.0, 30.75], [63.25, 30.65], [63.32, 30.68], [63.35, 30.75], [63.25, 31.0], [63.47, 31.53], [64.0, 31.75], [64.25, 31.65], [64.5, 31.75], [64.75, 31.65], [65.0, 31.75], [65.53, 31.53], [65.68, 31.18], [66.03, 31.03], [66.25, 30.5], [66.15, 30.25], [66.25, 30.0], [66.15, 29.75], [66.25, 29.5], [66.03, 28.97], [65.68, 28.82], [65.65, 28.76], [65.65, 28.75], [65.68, 28.68], [66.03, 28.53], [66.25, 28.0], [66.15, 27.75], [66.25, 27.5], [66.03, 26.97], [65.5, 26.75], [65.25, 26.85], [65.18, 26.82], [65.03, 26.47], [64.5, 26.25], [64.25, 26.35], [64.0, 26.25], [63.47, 26.47], [63.25, 27.0], [63.47, 27.53], [63.82, 27.68], [63.88, 27.8], [63.75, 27.85], [63.5, 27.75], [63.25, 27.85], [63.0, 27.75], [62.75, 27.85], [62.68, 27.82], [62.65, 27.75], [62.75, 27.5], [62.53, 26.97], [62.0, 26.75], [61.47, 26.97], [61.32, 27.32], [60.97, 27.47], [60.75, 28.0], [60.97, 28.53], [61.5, 28.75], [61.75, 28.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[61.75, 29.0], [61.85, 29.25], [61.75, 29.5], [61.97, 30.03], [62.5, 30.25], [62.75, 30.15], [62.82, 30.18], [62.97, 30.53], [63.5, 30.75], [63.75, 30.65], [63.82, 30.68], [63.85, 30.75], [63.75, 31.0], [63.97, 31.53], [64.5, 31.75], [64.75, 31.65], [65.0, 31.75], [65.53, 31.53], [65.68, 31.18], [66.03, 31.03], [66.25, 30.5], [66.15, 30.25], [66.25, 30.0], [66.15, 29.75], [66.25, 29.5], [66.03, 28.97], [65.63, 28.8], [65.68, 28.68], [66.03, 28.53], [66.25, 28.0], [66.15, 27.75], [66.25, 27.5], [66.03, 26.97], [65.5, 26.75], [65.25, 26.85], [65.18, 26.82], [65.03, 26.47], [64.5, 26.25], [64.25, 26.35], [64.0, 26.25], [63.47, 26.47], [63.25, 27.0], [63.47, 27.53], [63.82, 27.68], [63.88, 27.8], [63.75, 27.85], [63.5, 27.75], [63.25, 27.85], [63.0, 27.75], [62.75, 27.85], [62.5, 27.75], [61.97, 27.97], [61.75, 28.5], [61.85, 28.75], [61.75, 29.0]], [[64.88, 29.2], [64.82, 29.32], [64.75, 29.35], [64.68, 29.32], [64.63, 29.2], [64.75, 29.15], [64.88, 29.2]]]]}, "2023-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[60.97, 27.47], [60.75, 28.0], [60.97, 28.53], [61.5, 28.75], [61.75, 28.65], [61.82, 28.68], [61.85, 28.75], [61.75, 29.0], [61.85, 29.25], [61.75, 29.5], [61.97, 30.03], [62.32, 30.18], [62.47, 30.53], [63.0, 30.75], [63.25, 30.65], [63.32, 30.68], [63.35, 30.75], [63.25, 31.0], [63.47, 31.53], [64.0, 31.75], [64.25, 31.65], [64.5, 31.75], [64.75, 31.65], [65.0, 31.75], [65.53, 31.53], [65.68, 31.18], [66.03, 31.03], [66.25, 30.5], [66.15, 30.25], [66.25, 30.0], [66.15, 29.75], [66.25, 29.5], [66.03, 28.97], [65.68, 28.82], [65.65, 28.75], [65.68, 28.68], [66.03, 28.53], [66.25, 28.0], [66.15, 27.75], [66.25, 27.5], [66.03, 26.97], [65.5, 26.75], [65.25, 26.85], [65.18, 26.82], [65.03, 26.47], [64.5, 26.25], [64.25, 26.35], [64.0, 26.25], [63.47, 26.47], [63.25, 27.0], [63.47, 27.53], [63.82, 27.68], [63.88, 27.8], [63.75, 27.85], [63.5, 27.75], [63.25, 27.85], [63.0, 27.75], [62.75, 27.85], [62.68, 27.82], [62.65, 27.75], [62.75, 27.5], [62.53, 26.97], [62.0, 26.75], [61.47, 26.97], [61.32, 27.32], [60.97, 27.47]]]]}, "2023-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[60.97, 27.47], [60.75, 28.0], [60.97, 28.53], [61.5, 28.75], [61.75, 28.65], [61.82, 28.68], [61.85, 28.75], [61.75, 29.0], [61.85, 29.25], [61.75, 29.5], [61.97, 30.03], [62.32, 30.18], [62.47, 30.53], [63.0, 30.75], [63.25, 30.65], [63.32, 30.68], [63.35, 30.75], [63.25, 31.0], [63.47, 31.53], [64.0, 31.75], [64.25, 31.65], [64.5, 31.75], [64.75, 31.65], [65.0, 31.75], [65.53, 31.53], [65.68, 31.18], [66.03, 31.03], [66.25, 30.5], [66.15, 30.25], [66.25, 30.0], [66.15, 29.75], [66.25, 29.5], [66.03, 28.97], [65.68, 28.82], [65.65, 28.75], [65.68, 28.68], [66.03, 28.53], [66.25, 28.0], [66.15, 27.75], [66.25, 27.5], [66.03, 26.97], [65.5, 26.75], [65.25, 26.85], [65.18, 26.82], [65.03, 26.47], [64.5, 26.25], [64.25, 26.35], [64.0, 26.25], [63.47, 26.47], [63.25, 27.0], [63.47, 27.53], [63.82, 27.68], [63.88, 27.8], [63.75, 27.85], [63.5, 27.75], [63.25, 27.85], [63.0, 27.75], [62.75, 27.85], [62.68, 27.82], [62.65, 27.75], [62.75, 27.5], [62.53, 26.97], [62.0, 26.75], [61.47, 26.97], [61.32, 27.32], [60.97, 27.47]]]]}, "2023-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[60.75, 28.0], [60.97, 28.53], [61.5, 28.75], [61.75, 28.65], [62.0, 28.75], [62.53, 28.53], [62.75, 28.0], [62.65, 27.75], [62.75, 27.5], [62.53, 26.97], [62.0, 26.75], [61.47, 26.97], [61.32, 27.32], [60.97, 27.47], [60.75, 28.0]]], [[[65.53, 29.53], [65.75, 29.0], [65.53, 28.47], [65.0, 28.25], [64.75, 28.35], [64.5, 28.25], [63.97, 28.47], [63.75, 29.0], [63.97, 29.53], [64.5, 29.75], [64.75, 29.65], [65.0, 29.75], [65.53, 29.53]]], [[[63.47, 31.53], [64.0, 31.75], [64.25, 31.65], [64.5, 31.75], [65.03, 31.53], [65.25, 31.0], [65.15, 30.75], [65.25, 30.5], [65.03, 29.97], [64.5, 29.75], [64.25, 29.85], [64.0, 29.75], [63.7, 29.88], [63.53, 29.47], [63.0, 29.25], [62.47, 29.47], [62.25, 30.0], [62.47, 30.53], [63.0, 30.75], [63.3, 30.63], [63.35, 30.75], [63.25, 31.0], [63.47, 31.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.770358913339919}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.913145162802385}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.96172994223741, 22.338259483265404, 22.570495164115698, 22.363612204429614]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.490451272020664, 18.00809251728043, 18.690934452732506, 20.851241336085366]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6397161158330222, -4.202420329071027, -3.893964523806295, -3.707073100074774]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.292175398532038, -5.770358913339919, -5.003855283029111, -4.41156398268123]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3816114939868567, -1.6100195831534134, -1.462467613381716, -1.315522733412967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6308529150800128, -1.8483014923625152, -1.7444737210522223, -1.4557987288547933]}}