气候变化领域集成服务门户(CCPortal): Contributions of different combinations of the IPO and AMO to the concurrent variations of summer east asian jets

CCPortal

DOI	10.1175/JCLI-D-19-0366.1
	Contributions of different combinations of the IPO and AMO to the concurrent variations of summer east asian jets
	Xiao X.; Huang D.; Yang B.; Zhu J.; Yan P.; Zhang Y.
发表日期	2020
ISSN	0894-8755
起始页码	7967
结束页码	7982
卷号	33 期号:18
英文摘要	Huang et al. recently reported that opposite phases of the interdecadal Pacific oscillation (IPO) and the Atlantic multidecadal oscillation (AMO) can affect the shift of the East Asian polar front jet (EAPJ) and the East Asian subtropical jet (EASJ) in the boreal winter. To give a full image of the relationship among the IPO, AMO, and concurrent variation of jets throughout the whole year, this study investigates the changes in summer jets response to the combinations of the IPO and AMO, and mostly focuses on the quantitative analysis in the role of the IPO and AMO. Both of the diagnostic analysis and atmospheric model simulations confirm that combinations of the negative phase of the IPO (‘‘2IPO’’) and the positive phase of the AMO (‘‘1AMO’’) can significantly enhance the EAPJ and reduce the EASJ in the summer, via the meridional temperature gradient and the Eady growth rate, and vice versa in the ‘‘1IPO 2AMO’’ combination. The reanalysis data show that this relationship is particularly evident between the periods of 1999–2014 and 1979–98. Based on the simulations, the multilinear regression has indicated that 2IPO plays a more important role than 1AMO, particularly for the reduced EASJ. We have further revealed two pathways of the stationary Rossby wave activity anomaly, eastward from the North Atlantic to East Asia along 608N and westward from the North Pacific to East Asia along 408N. The two activities are associated with anomalous anticyclone along the active regions between EAPJ and EASJ, and therefore affect the jet variations. © 2020 American Meteorological Society.
英文关键词	Mechanical waves; Atlantic multidecadal oscillations; Atmospheric model simulations; Diagnostic analysis; Inter-decadal pacific oscillations; Meridional temperature gradient; Multi-linear regression; Rossby wave activity; Subtropical jet; Growth rate; Atlantic Multidecadal Oscillation; atmospheric modeling; decadal variation; quantitative analysis; summer; temperature gradient; winter; Pacific Ocean; Pacific Ocean (East); Pacific Ocean (North)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171112
作者单位	School of Atmospheric Sciences, Nanjing University, Nanjing, China; College of Hydrology and Water Resources, Hohai University, Nanjing, China; Meteorological Bureau of Shaoxing, Shaoxing, China
推荐引用方式 GB/T 7714	Xiao X.,Huang D.,Yang B.,et al. Contributions of different combinations of the IPO and AMO to the concurrent variations of summer east asian jets[J],2020,33(18).
APA	Xiao X.,Huang D.,Yang B.,Zhu J.,Yan P.,&Zhang Y..(2020).Contributions of different combinations of the IPO and AMO to the concurrent variations of summer east asian jets.Journal of Climate,33(18).
MLA	Xiao X.,et al."Contributions of different combinations of the IPO and AMO to the concurrent variations of summer east asian jets".Journal of Climate 33.18(2020).