Impact of the North Pacific Meridional Mode on the Tropical Pacific Modulated by the Interdecadal Pacific Oscillation

doi:10.1175/JCLI-D-23-0448.1

IOCAS-IR > 海洋环流与波动重点实验室

	Impact of the North Pacific Meridional Mode on the Tropical Pacific Modulated by the Interdecadal Pacific Oscillation
	Liu, Bowen 1,2; Gan, Bolan 1,2,3; Jia, Fan 3,4; Wu, Lixin 1,2,3
	2024-04-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	37 期号:7 页码:2199-2216
通讯作者	Gan, Bolan(gbl0203@ouc.edu.cn) ; Jia, Fan(jiafan@qdio.ac)
摘要	The North Pacific meridional mode (NPMM) peaking in boreal spring influences El Nino-Southern Oscillation (ENSO) properties in the ensuing winter. Whether the precursory impact of NPMM on the spatial diversity of ENSO has decadal variation remains unknown. Using long-term reanalysis datasets, we find that the interdecadal Pacific oscillation (IPO) significantly modulates the NPMM forcing on two types of ENSO. During the positive IPO (1IPO) phase, a strengthened background Aleutian low and southward -shifted storm track, in comparison to the negative IPO (-IPO) phase, produce stronger basin -scale negative geopotential height tendency anomalies over the North Pacific through synopticscale eddy-mean flow interaction. Such strong background negative tendency facilitates an Aleutian low-like pressure monopole rather than a North Pacific Oscillation (NPO)-like pressure dipole in boreal spring, leading to a weak NPMM that cannot effectively promote development of either a central Pacific (CP) or an eastern Pacific (EP) ENSO. By contrast, the NPO-like dipole enhances in boreal spring during -IPO, corresponding to stronger and more frequently occurring NPMM events that induce a robust CP-ENSO-like response in boreal winter. Moreover, the -IPO-related tropical Pacific mean states and the associated positive feedbacks cause a strong decrease in mixed layer temperature variance in the equatorial eastern Pacific, but a slight increase in the central Pacific, thus further contributing to the enhanced correlation between NPMM and CP-ENSO. Therefore, -IPO has played a role in the stronger impact of NPMM on CP-ENSO since the 1990s, and the modulation effects of IPO should be considered in understanding the extratropical-tropical climatic connection and ENSO spatial diversity.
关键词	Pacific Ocean Air-sea interaction ENSO Interdecadal variability
DOI	10.1175/JCLI-D-23-0448.1
收录类别	SCI
语种	英语
资助项目	Science and Technology Innovation Foundation of Laoshan Laboratory[LSKJ202202602] ; National Key Research and Development Program of China[2020YFA0608801] ; National Natural Science Foundation of China[42276016] ; National Natural Science Foundation of China[42376006] ; National Natural Science Foundation of China[2023YFF0805103] ; National Natural Science Foundation of China[LSKJ202202402] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2021205] ; Taishan Scholars Program[tsqn202312265]
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001182112200001
出版者	AMER METEOROLOGICAL SOC
WOS关键词	NINO-SOUTHERN OSCILLATION ; LAYER HEAT-BALANCE ; EL-NINO ; EASTERN-PACIFIC ; ASYMMETRIC MODULATION ; SURFACE-TEMPERATURE ; CLIMATE VARIABILITY ; BOOTSTRAP METHODS ; ENSO ; OCEAN
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184835
专题	海洋环流与波动重点实验室
通讯作者	Gan, Bolan; Jia, Fan
作者单位	1.Ocean Univ China, Acad Future Ocean, Key Lab Phys Oceanog, Qingdao, Peoples R China 2.Ocean Univ China, Acad Future Ocean, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao, Peoples R China 3.Laoshan Lab, Qingdao, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Liu, Bowen,Gan, Bolan,Jia, Fan,et al. Impact of the North Pacific Meridional Mode on the Tropical Pacific Modulated by the Interdecadal Pacific Oscillation[J]. JOURNAL OF CLIMATE,2024,37(7):2199-2216.
APA	Liu, Bowen,Gan, Bolan,Jia, Fan,&Wu, Lixin.(2024).Impact of the North Pacific Meridional Mode on the Tropical Pacific Modulated by the Interdecadal Pacific Oscillation.JOURNAL OF CLIMATE,37(7),2199-2216.
MLA	Liu, Bowen,et al."Impact of the North Pacific Meridional Mode on the Tropical Pacific Modulated by the Interdecadal Pacific Oscillation".JOURNAL OF CLIMATE 37.7(2024):2199-2216.