{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:55.605142", "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": "2013-Nov-29_to_2013-Dec-01_214.5_59.5"}, "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": 2013110001278}, "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": "November 29 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 2013"}, "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": 116968.82193979801}, "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": ["N.Pacific-Ocean", "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": ["Gulf of Alaska", "North Pacific Ocean"]}, "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": 59.5}, "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": 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": 212.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 218.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-147.65, 56.75], [-147.75, 57.0], [-147.65, 57.25], [-147.75, 57.5], [-147.65, 57.75], [-147.75, 58.0], [-147.65, 58.25], [-147.75, 58.5], [-147.65, 58.75], [-147.75, 59.0], [-147.53, 59.53], [-147.18, 59.68], [-147.15, 59.75], [-147.25, 60.0], [-147.15, 60.25], [-147.25, 60.5], [-147.03, 61.03], [-146.5, 61.25], [-146.25, 61.15], [-146.0, 61.25], [-145.47, 61.03], [-145.32, 60.68], [-145.25, 60.65], [-145.0, 60.75], [-144.75, 60.65], [-144.5, 60.75], [-144.25, 60.65], [-144.0, 60.75], [-143.75, 60.65], [-143.5, 60.75], [-143.0, 60.54], [-142.5, 60.75], [-142.25, 60.65], [-142.0, 60.75], [-141.47, 60.53], [-141.25, 60.0], [-141.47, 59.47], [-141.82, 59.32], [-141.85, 59.25], [-141.75, 59.0], [-141.97, 58.47], [-142.5, 58.25], [-142.75, 58.35], [-142.82, 58.32], [-142.85, 58.25], [-142.75, 58.0], [-142.85, 57.75], [-142.75, 57.5], [-142.85, 57.25], [-142.75, 57.0], [-142.97, 56.47], [-143.5, 56.25], [-143.75, 56.35], [-144.0, 56.25], [-144.25, 56.35], [-144.32, 56.32], [-144.47, 55.97], [-144.82, 55.82], [-144.97, 55.47], [-145.5, 55.25], [-145.75, 55.35], [-145.82, 55.32], [-145.97, 54.97], [-146.5, 54.75], [-147.03, 54.97], [-147.18, 55.32], [-147.53, 55.47], [-147.75, 56.0], [-147.65, 56.25], [-147.75, 56.5], [-147.65, 56.75]]]]}, "2013-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-147.65, 56.75], [-147.75, 57.0], [-147.65, 57.25], [-147.75, 57.5], [-147.65, 57.75], [-147.75, 58.0], [-147.65, 58.25], [-147.75, 58.5], [-147.65, 58.75], [-147.75, 59.0], [-147.53, 59.53], [-147.18, 59.68], [-147.15, 59.75], [-147.25, 60.0], [-147.15, 60.25], [-147.25, 60.5], [-147.03, 61.03], [-146.5, 61.25], [-146.25, 61.15], [-146.0, 61.25], [-145.47, 61.03], [-145.32, 60.68], [-145.25, 60.65], [-145.0, 60.75], [-144.75, 60.65], [-144.5, 60.75], [-144.25, 60.65], [-144.0, 60.75], [-143.75, 60.65], [-143.5, 60.75], [-143.0, 60.54], [-142.5, 60.75], [-142.25, 60.65], [-142.0, 60.75], [-141.47, 60.53], [-141.25, 60.0], [-141.47, 59.47], [-141.82, 59.32], [-141.85, 59.25], [-141.75, 59.0], [-141.97, 58.47], [-142.5, 58.25], [-142.75, 58.35], [-142.82, 58.32], [-142.85, 58.25], [-142.75, 58.0], [-142.85, 57.75], [-142.75, 57.5], [-142.85, 57.25], [-142.75, 57.0], [-142.97, 56.47], [-143.5, 56.25], [-143.75, 56.35], [-144.0, 56.25], [-144.25, 56.35], [-144.32, 56.32], [-144.47, 55.97], [-144.82, 55.82], [-144.97, 55.47], [-145.5, 55.25], [-145.75, 55.35], [-145.82, 55.32], [-145.97, 54.97], [-146.5, 54.75], [-147.03, 54.97], [-147.18, 55.32], [-147.53, 55.47], [-147.75, 56.0], [-147.65, 56.25], [-147.75, 56.5], [-147.65, 56.75]]]]}, "2013-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-147.65, 56.75], [-147.75, 57.0], [-147.65, 57.25], [-147.75, 57.5], [-147.65, 57.75], [-147.75, 58.0], [-147.65, 58.25], [-147.75, 58.5], [-147.65, 58.75], [-147.75, 59.0], [-147.53, 59.53], [-147.18, 59.68], [-147.15, 59.75], [-147.25, 60.0], [-147.15, 60.25], [-147.25, 60.5], [-147.03, 61.03], [-146.5, 61.25], [-146.25, 61.15], [-146.0, 61.25], [-145.47, 61.03], [-145.32, 60.68], 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-8.542533204401195}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.250408944172358}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.6021395561712097, -0.7347409328465346, 0.4812234451371751]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.570955275769336, -6.984930311883545, -5.019650908094036]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.840752481269822, -5.095930811628267, -3.814543539618975]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.2396933590714525, -8.542533204401195, -7.545862988314127]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7386542863354388, -2.248824183344587, -1.6686117164395422]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.269930099868326, -2.806630334498005, -2.2036224260070525]}}