Premium
The characteristics of extreme cold events and cold air outbreaks in the eastern United States
Author(s) -
Smith Erik T.,
Sheridan Scott C.
Publication year - 2018
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.5408
Subject(s) - climatology , environmental science , extreme cold , magnitude (astronomy) , latitude , atmospheric sciences , geography , geology , physics , geodesy , astronomy
Periods of extreme cold impact the mid‐latitudes every winter. Depending on the magnitude and duration of the occurrence, extremely cold periods may be deemed cold air outbreaks (CAOs). A systematic CAO index and ranking system was developed from 20 surface weather stations from 1948 through 2016, based on a set of criteria concerning magnitude, duration, and spatial extent. Standard deviations in temperature were used to identify extreme temperatures relative to the station. A total of 49 CAOs occurred during the 67‐year period, with the majority occurring during mid‐winter. The number of CAOs proved to be largely dependent on the stations latitude and maritime influence. The duration, magnitude, and spatial extent were dependent on the time of the winter season in which the CAO occurred. Furthermore, two prominent clusters of an increased number of CAOs occurred during the 67‐year period, suggesting multi‐decadal circulations may be a factor in CAOs.