{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:56.344635", "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": "2012-Jul-17_to_2012-Jul-20_214.5_65.0"}, "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": 2012070000986}, "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": "July 17 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 20 2012"}, "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": 166560.76934972315}, "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": ["Canada", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.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": 65.0}, "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": 214.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "214.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 202.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 219.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-146.03, 64.47], [-146.25, 65.0], [-146.03, 65.53], [-145.5, 65.75], [-145.25, 65.65], [-145.0, 65.75], [-144.47, 65.53], [-144.25, 65.0], [-144.47, 64.47], [-145.0, 64.25], [-145.25, 64.35], [-145.5, 64.25], [-146.03, 64.47]]]]}, "2012-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.25, 67.0], [-157.03, 67.53], [-156.5, 67.75], [-156.25, 67.65], [-156.0, 67.75], [-155.75, 67.65], [-155.5, 67.75], [-155.25, 67.65], [-155.0, 67.75], [-154.75, 67.65], [-154.68, 67.68], [-154.53, 68.03], [-154.0, 68.25], [-153.75, 68.15], [-153.5, 68.25], [-153.25, 68.15], [-153.0, 68.25], [-152.75, 68.15], [-152.5, 68.25], [-152.25, 68.15], [-152.0, 68.25], [-151.75, 68.15], [-151.5, 68.25], [-151.25, 68.15], [-151.0, 68.25], [-150.75, 68.15], [-150.5, 68.25], [-150.25, 68.15], [-150.0, 68.25], [-149.75, 68.15], [-149.5, 68.25], [-149.25, 68.15], [-149.0, 68.25], [-148.47, 68.03], [-148.32, 67.68], [-148.25, 67.65], [-148.0, 67.75], [-147.75, 67.65], [-147.5, 67.75], [-147.25, 67.65], [-147.0, 67.75], [-146.75, 67.65], [-146.5, 67.75], [-146.25, 67.65], [-146.0, 67.75], [-145.75, 67.65], [-145.5, 67.75], [-145.25, 67.65], [-145.0, 67.75], [-144.75, 67.65], [-144.5, 67.75], [-144.25, 67.65], [-144.0, 67.75], [-143.75, 67.65], [-143.5, 67.75], [-142.97, 67.53], [-142.82, 67.18], [-142.75, 67.15], [-142.5, 67.25], [-142.25, 67.15], [-142.0, 67.25], [-141.75, 67.15], [-141.5, 67.25], [-141.25, 67.15], [-141.0, 67.25], [-140.47, 67.03], [-140.25, 66.5], [-140.47, 65.97], [-140.82, 65.82], [-140.97, 65.47], [-141.5, 65.25], [-141.75, 65.35], [-141.82, 65.32], [-141.97, 64.97], [-142.5, 64.75], [-142.75, 64.85], [-143.0, 64.75], [-143.25, 64.85], [-143.5, 64.75], [-143.75, 64.85], [-144.0, 64.75], [-144.25, 64.85], [-144.32, 64.82], [-144.47, 64.47], [-145.0, 64.25], [-145.25, 64.35], [-145.5, 64.25], [-145.75, 64.35], [-146.0, 64.25], [-146.25, 64.35], [-146.5, 64.25], [-146.75, 64.35], [-147.0, 64.25], [-147.25, 64.35], [-147.5, 64.25], [-147.75, 64.35], [-148.0, 64.25], [-148.53, 64.47], [-148.68, 64.82], [-148.75, 64.85], [-149.0, 64.75], [-149.25, 64.85], [-149.5, 64.75], [-149.75, 64.85], [-150.0, 64.75], [-150.25, 64.85], [-150.5, 64.75], [-150.75, 64.85], [-151.0, 64.75], [-151.25, 64.85], [-151.5, 64.75], [-151.75, 64.85], [-152.0, 64.75], [-152.25, 64.85], [-152.5, 64.75], [-152.75, 64.85], [-153.0, 64.75], [-153.25, 64.85], [-153.5, 64.75], [-153.75, 64.85], [-154.0, 64.75], [-154.25, 64.85], [-154.5, 64.75], [-154.75, 64.85], [-155.0, 64.75], [-155.53, 64.97], [-155.68, 65.32], [-155.75, 65.35], [-156.0, 65.25], [-156.25, 65.35], [-156.32, 65.32], [-156.47, 64.97], [-157.0, 64.75], [-157.53, 64.97], [-157.75, 65.5], [-157.53, 66.03], [-157.18, 66.18], [-157.04, 66.5], [-157.25, 67.0]]]]}, "2012-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.25, 67.0], [-157.03, 67.53], [-156.5, 67.75], [-156.25, 67.65], [-156.0, 67.75], [-155.75, 67.65], [-155.5, 67.75], [-155.25, 67.65], [-155.0, 67.75], [-154.75, 67.65], [-154.68, 67.68], [-154.53, 68.03], [-154.0, 68.25], [-153.75, 68.15], [-153.5, 68.25], [-153.25, 68.15], [-153.0, 68.25], [-152.75, 68.15], [-152.5, 68.25], [-152.25, 68.15], [-152.0, 68.25], [-151.75, 68.15], [-151.5, 68.25], [-151.25, 68.15], [-151.0, 68.25], [-150.75, 68.15], [-150.5, 68.25], [-150.25, 68.15], [-150.0, 68.25], [-149.75, 68.15], [-149.5, 68.25], [-149.25, 68.15], [-149.0, 68.25], [-148.47, 68.03], [-148.32, 67.68], [-148.25, 67.65], [-148.0, 67.75], [-147.75, 67.65], [-147.5, 67.75], [-147.25, 67.65], [-147.0, 67.75], [-146.75, 67.65], [-146.5, 67.75], [-146.25, 67.65], [-146.0, 67.75], [-145.75, 67.65], [-145.5, 67.75], [-145.25, 67.65], [-145.0, 67.75], [-144.75, 67.65], [-144.5, 67.75], [-144.25, 67.65], [-144.0, 67.75], [-143.75, 67.65], [-143.5, 67.75], [-142.97, 67.53], [-142.82, 67.18], [-142.75, 67.15], [-142.5, 67.25], [-142.25, 67.15], [-142.0, 67.25], [-141.75, 67.15], [-141.5, 67.25], [-141.25, 67.15], [-141.0, 67.25], [-140.47, 67.03], [-140.25, 66.5], [-140.47, 65.97], [-140.82, 65.82], [-140.97, 65.47], [-141.5, 65.25], [-141.75, 65.35], [-141.82, 65.32], [-141.97, 64.97], [-142.5, 64.75], [-142.75, 64.85], [-143.0, 64.75], [-143.25, 64.85], [-143.5, 64.75], [-143.75, 64.85], [-144.0, 64.75], [-144.25, 64.85], [-144.32, 64.82], [-144.47, 64.47], [-145.0, 64.25], [-145.25, 64.35], [-145.5, 64.25], [-145.75, 64.35], [-146.0, 64.25], [-146.25, 64.35], [-146.5, 64.25], [-146.75, 64.35], [-147.0, 64.25], [-147.25, 64.35], [-147.5, 64.25], [-147.75, 64.35], [-148.0, 64.25], [-148.53, 64.47], [-148.68, 64.82], [-148.75, 64.85], [-149.0, 64.75], [-149.25, 64.85], [-149.5, 64.75], [-149.75, 64.85], [-150.0, 64.75], [-150.25, 64.85], [-150.5, 64.75], [-150.75, 64.85], [-151.0, 64.75], [-151.25, 64.85], [-151.5, 64.75], [-151.75, 64.85], [-152.0, 64.75], [-152.25, 64.85], [-152.5, 64.75], [-152.75, 64.85], [-153.0, 64.75], [-153.25, 64.85], [-153.5, 64.75], [-153.75, 64.85], [-154.0, 64.75], [-154.25, 64.85], [-154.5, 64.75], [-154.75, 64.85], [-155.0, 64.75], [-155.53, 64.97], [-155.68, 65.32], [-155.75, 65.35], [-156.0, 65.25], [-156.25, 65.35], [-156.32, 65.32], [-156.47, 64.97], [-157.0, 64.75], [-157.53, 64.97], [-157.75, 65.5], [-157.53, 66.03], [-157.18, 66.18], [-157.04, 66.5], [-157.25, 67.0]]]]}, "2012-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.25, 67.0], [-157.03, 67.53], [-156.5, 67.75], [-156.25, 67.65], [-156.0, 67.75], [-155.75, 67.65], [-155.5, 67.75], [-155.25, 67.65], [-155.0, 67.75], [-154.75, 67.65], [-154.68, 67.68], [-154.53, 68.03], [-154.0, 68.25], [-153.75, 68.15], [-153.5, 68.25], [-153.25, 68.15], [-153.0, 68.25], [-152.75, 68.15], [-152.5, 68.25], [-152.25, 68.15], [-152.0, 68.25], [-151.75, 68.15], [-151.5, 68.25], [-151.25, 68.15], [-151.0, 68.25], [-150.75, 68.15], [-150.5, 68.25], [-150.25, 68.15], [-150.0, 68.25], [-149.75, 68.15], [-149.5, 68.25], [-149.25, 68.15], [-149.0, 68.25], [-148.47, 68.03], [-148.32, 67.68], [-148.25, 67.65], [-148.0, 67.75], [-147.75, 67.65], [-147.5, 67.75], [-147.25, 67.65], [-147.0, 67.75], [-146.75, 67.65], [-146.5, 67.75], [-146.25, 67.65], [-146.0, 67.75], [-145.75, 67.65], [-145.5, 67.75], [-145.25, 67.65], [-145.0, 67.75], [-144.75, 67.65], [-144.5, 67.75], [-144.25, 67.65], [-144.0, 67.75], [-143.75, 67.65], [-143.5, 67.75], [-142.97, 67.53], [-142.82, 67.18], [-142.75, 67.15], [-142.5, 67.25], [-142.25, 67.15], [-142.0, 67.25], [-141.75, 67.15], [-141.5, 67.25], [-141.25, 67.15], [-141.0, 67.25], [-140.47, 67.03], [-140.25, 66.5], [-140.47, 65.97], [-140.82, 65.82], [-140.97, 65.47], [-141.5, 65.25], [-141.75, 65.35], [-141.82, 65.32], [-141.97, 64.97], [-142.5, 64.75], [-142.75, 64.85], [-143.0, 64.75], [-143.25, 64.85], [-143.5, 64.75], [-143.75, 64.85], [-144.0, 64.75], [-144.25, 64.85], [-144.5, 64.75], [-144.75, 64.85], [-144.82, 64.82], [-144.97, 64.47], [-145.5, 64.25], [-145.75, 64.35], [-146.0, 64.25], [-146.25, 64.35], [-146.5, 64.25], [-146.75, 64.35], [-147.0, 64.25], [-147.25, 64.35], [-147.5, 64.25], [-147.75, 64.35], [-148.0, 64.25], [-148.53, 64.47], [-148.68, 64.82], [-148.75, 64.85], [-149.0, 64.75], [-149.25, 64.85], [-149.5, 64.75], [-149.75, 64.85], [-150.0, 64.75], [-150.25, 64.85], [-150.5, 64.75], [-150.75, 64.85], [-151.0, 64.75], [-151.25, 64.85], [-151.5, 64.75], [-151.75, 64.85], [-152.0, 64.75], [-152.25, 64.85], [-152.5, 64.75], [-152.75, 64.85], [-153.0, 64.75], [-153.25, 64.85], [-153.5, 64.75], [-153.75, 64.85], [-154.0, 64.75], [-154.25, 64.85], [-154.5, 64.75], [-154.75, 64.85], [-155.0, 64.75], [-155.53, 64.97], [-155.68, 65.32], [-155.75, 65.35], [-156.0, 65.25], [-156.25, 65.35], [-156.32, 65.32], [-156.47, 64.97], [-157.0, 64.75], [-157.53, 64.97], [-157.75, 65.5], [-157.53, 66.03], [-157.18, 66.18], [-157.04, 66.5], [-157.25, 67.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.848386476157145}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.083043623380836}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.642487306464773, 10.152996290633837, 9.521018366104158, 10.051425197854826]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.202326533749158, 5.158079920131456, 5.817639715779649, 6.480350817269766]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.872678387455778, -4.845024304772744, -5.464456089937403, -4.956773312454167]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.927143945288435, -6.343377708160688, -6.848386476157145, -5.866466847728702]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.372501032554278, -1.6279371486179095, -1.8672455420046636, -1.7049299267625682]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3764790392431916, -1.9863554702945319, -2.316833115423939, -1.9935533245590262]}}