{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:31.957224", "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-Jun-12_to_2023-Jun-14_259.5_36.5"}, "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": 2023060000407}, "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": "June 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 14 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": 66797.3433037832}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 36.5}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 255.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-104.25, 37.15], [-104.18, 37.18], [-104.15, 37.25], [-104.25, 37.5], [-104.03, 38.03], [-103.5, 38.25], [-102.97, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.03, 38.03], [-101.5, 38.25], [-101.25, 38.15], [-101.0, 38.25], [-100.75, 38.15], [-100.5, 38.25], [-100.25, 38.15], [-100.0, 38.25], [-99.47, 38.03], [-99.32, 37.68], [-99.25, 37.65], [-99.0, 37.75], [-98.47, 37.53], [-98.25, 37.0], [-98.47, 36.47], [-98.82, 36.32], [-98.97, 35.97], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.5, 35.75], [-100.75, 35.85], [-101.0, 35.75], [-101.25, 35.85], [-101.5, 35.75], [-101.75, 35.85], [-102.0, 35.75], [-102.25, 35.85], [-102.5, 35.75], [-102.8, 35.88], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.53, 35.47], [-104.68, 35.82], [-105.03, 35.97], [-105.25, 36.5]]]]}, "2023-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-104.25, 37.15], [-104.18, 37.18], [-104.15, 37.25], [-104.25, 37.5], [-104.03, 38.03], [-103.5, 38.25], [-102.97, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.03, 38.03], [-101.5, 38.25], [-101.25, 38.15], [-101.0, 38.25], [-100.75, 38.15], [-100.5, 38.25], [-100.25, 38.15], [-100.0, 38.25], [-99.47, 38.03], [-99.32, 37.68], [-99.25, 37.65], [-99.0, 37.75], [-98.47, 37.53], [-98.25, 37.0], [-98.47, 36.47], [-98.82, 36.32], [-98.97, 35.97], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.5, 35.75], [-100.75, 35.85], [-101.0, 35.75], [-101.25, 35.85], [-101.5, 35.75], [-101.75, 35.85], [-102.0, 35.75], [-102.25, 35.85], [-102.5, 35.75], [-102.8, 35.88], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.53, 35.47], [-104.68, 35.82], [-105.03, 35.97], [-105.25, 36.5]]]]}, "2023-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 36.5], [-105.03, 37.03], [-104.5, 37.25], [-104.25, 37.15], [-104.18, 37.18], [-104.15, 37.25], [-104.25, 37.5], [-104.03, 38.03], [-103.5, 38.25], [-102.97, 38.03], [-102.82, 37.68], [-102.75, 37.65], [-102.5, 37.75], [-102.25, 37.65], [-102.18, 37.68], [-102.03, 38.03], [-101.5, 38.25], [-101.25, 38.15], [-101.0, 38.25], [-100.75, 38.15], [-100.5, 38.25], [-100.25, 38.15], [-100.0, 38.25], [-99.47, 38.03], [-99.32, 37.68], [-99.25, 37.65], [-99.0, 37.75], [-98.47, 37.53], [-98.25, 37.0], [-98.47, 36.47], [-98.82, 36.32], [-98.97, 35.97], [-99.5, 35.75], [-99.75, 35.85], [-100.0, 35.75], [-100.25, 35.85], [-100.5, 35.75], [-100.75, 35.85], [-101.0, 35.75], [-101.25, 35.85], [-101.5, 35.75], [-101.75, 35.85], [-102.0, 35.75], [-102.25, 35.85], [-102.5, 35.75], [-102.8, 35.88], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.53, 35.47], [-104.68, 35.82], [-105.03, 35.97], [-105.25, 36.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.297643711325065}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.640512081623884}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.11786732577235, 16.635789385468797, 18.357451206509154]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.308185823604788, 13.46861331267894, 14.772937164829443]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.70846069178678, -6.384046166666651, -4.82902938641822]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.372331206020078, -7.297643711325065, -5.524506026277038]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6913343357247954, -1.9299558473008274, -1.486875214074367]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8555339885836044, -2.1841578832621913, -1.6244906359733453]}}