Combined impact of the cold vortex and atmospheric blocking on cold outbreaks over East Asia and the potential for short-range prediction of such occurrences

Datos Bibliográficos

ID15544720
AutoresWenqin Zhuo (Chinese Academy of Sciences), Yao Yao (0000-0002-6723-6152, Chinese Academy of Sciences, autor de correspondencia), Dehai Luo (0000-0001-8834-8623, Chinese Academy of Sciences), Ian Simmonds (0000-0002-4479-3255, The University of Melbourne), Fei Huang (0000-0002-3709-5053, Ocean University of China)
Año2022
Volumen17
Número8
Páginas084037-084037
Fecha de publicación2022-07-22
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaEnvironmental Research Letters (JOURNAL)
Identificadores de la revistaISSN: 1748-9326 • E-ISSN: 1748-9326
EditorialIOP Publishing (PUBLISHER • GB)
DOI10.1088/1748-9326/ac8362
OpenAlexW4286615281
IdiomaEN
Citas recibidas3
Referencias citadas50

This study explores the consequences of independent and combined effects of blockings on the northeast Asian cold vortex (NACV), and corresponding cold outbreaks over East Asia (EA) during boreal winters of 1979–2019. The results show that the development of NACV is closely associated with blocking over the Ural Mountains (UB) upstream and eastern Siberia to mid-North Pacific (SPB) downstream. Here we focus on the initial periods before the peak day of NACV events. It is found that the strong NACV events are usually induced by the initial-UB situation, leading to the greatest temperature drop in EA. While the weak NACV events may be associated with the initial-SPB condition, which can bring less dramatic outbreaks but longer duration, owing to the Ural ridge that formed by the westward shift of SPB. Furthermore, an SPB-UB relay effect is discovered against the background of a negative Arctic Oscillation pattern. In such cases, UB is formed by the westward shift of downstream SPB after the occurrence of NACV, forming a relay effect that motivates the second NACV process, hence prolonging the duration of cold anomalies in EA. These findings highlight the importance of the combined effect of blockings and NACV in the intraseasonal time scale. Compared to the ‘Initial-UB’ and ‘Initial-SPB’ situation, this ‘SPB-UB relay’ scenario can produce longer-lasting cold extreme in EA, which may be indicative of the short-term weather forecasting of such extreme cold weather

Arctic · Arctic oscillation · Atmospheric sciences · Climatology · East Asia · Extreme Cold · Geography · Meteorology · Polar vortex · Ridge · Siberian High · Stratosphere · Arctic and Antarctic ice dynamics · Climate variability and models · Environmental Science · Meteorological Phenomena and Simulations · Geology · Oceanography