DOI: 10.1002/jgrd.50650
论文题名: Influence of the vertical and zonal propagation of stratospheric planetary waves on tropospheric blockings
作者: Kodera K. ; Mukougawa H. ; Fujii A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8333
结束页码: 8345
语种: 英语
英文关键词: Blocking
; Planetary wave
; stratosphere
; sudden warming
Scopus关键词: Upper atmosphere
; Wave packets
; Blocking
; Eastern Canada
; Planetary Waves
; Propagating waves
; Stratospheric sudden warmings
; sudden warming
; Upper troposphere
; Zonal propagation
; Troposphere
; global warming
; planetary wave
; stratosphere
; troposphere
; wave reflection
; westerly
; Canada
; Pacific Ocean
; Pacific Ocean (North)
; Pacific-Antarctic Ridge
英文摘要: Case studies are used to elucidate the relationship between stratospheric planetary wave reflection and blocking formation in the troposphere. The enhanced upward propagation of a planetary-scale wave packet from the Eurasian sector, involving a Euro-Atlantic blocking, leads to a stratospheric sudden warming (SSW). Following the weakening of the stratospheric westerly jet due to polar warming, the stratospheric planetary wave packet then propagates downward over the American sector, inducing a ridge over the North Pacific as well as a trough over eastern Canada in the upper troposphere. The ridge promotes the formation of a Pacific blocking. This result explains why Pacific blockings tend to form after SSW, and why they are associated with suppressed upward propagation of planetary waves. Key Points Planetary wave packet propagates downward from the stratosphere after SSW The downward propagating wave packet enhances Pacific ridge in the troposphere The enhanced ridge promotes the occurrence of Pacific blocking after SSW ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63491
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan; Disaster Prevention Research Institute, Kyoto University, Uji, Japan
Recommended Citation:
Kodera K.,Mukougawa H.,Fujii A.. Influence of the vertical and zonal propagation of stratospheric planetary waves on tropospheric blockings[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)