Vb Cyclones Synchronized With the Arctic-/North Atlantic Oscillation.

ABSTRACT: Vb cyclones typically emerge in the Western Mediterranean and propagate to the Northeast into Central Europe. This paper explores the temporal characteristics of Vb cyclone occurrence based on cyclone tracks identified at the atmospheric levels of Z700 and sea level pressure, using JRA-55 reanalysis data for the period 1959-2015. The risk of Vb occurrence was significantly high in the 1960s and has remained at a lower level since then. Vb cyclones do not occur fully randomly according to a Poisson point process. Eleven well-separated and distinct clusters as well as 11 hiatus periods are identified, with average occurrence rates of 21.5 and 5.2 yrea^-1, respectively. During the event of Vb, the large-scale atmospheric circulation is changed into a state favoring the development o

SUBMITTER: Hofstatter M 

PROVIDER: S-EPMC6559292 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature