Salinity effect-induced ENSO amplitude modulation in association with the interdecadal Pacific Oscillation

doi:10.1007/s00343-023-3129-y

IOCAS-IR > 海洋环流与波动重点实验室

	Salinity effect-induced ENSO amplitude modulation in association with the interdecadal Pacific Oscillation
	Zhi, Hai 1; Wang, Xiaokun 1; Zhang, Rong-Hua2,3 ; Lin, Pengfei 4; Qi, Jifeng 3,5,6
	2024-04-04
发表期刊	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	2096-5508
页码	18
通讯作者	Zhang, Rong-Hua(rzhang@nuist.edu.cn)
摘要	A 110-year ensemble simulation of an ocean general circulation model (OGCM) was analyzed to identify the modulation of salinity interdecadal variability on El Nino-Southern Oscillation (ENSO) amplitude in the tropical Pacific during 1901-2010. The simulating results show that sea surface salinity (SSS) variation in the region exhibits notable and coherent interdecadal variability signal, which is closely associated with the Interdecadal Pacific Oscillation (IPO). As salinity increases or reduces, the SSS modulations on ENSO amplitude during its warm/cold events vary asymmetrically with positive/negative IPO phases. Physically, salinity interdecadal variability can enhance or reduce ENSO-related conditions in upper-ocean stratification, contributing noticeably to ENSO variability. Salinity anomalies associated with the mixed layer depth and barrier layer thickness can modulate ENSO amplitude during positive and negative IPO phases, resulting in the asymmetry of sea surface temperature (SST) anomaly in the tropical Pacific. During positive IPO phases, SSS interdecadal variability contributes positively to El Nino amplitude but negatively to La Nina amplitude by enhancing or reducing SSS interannual variability, and vice versa during negative IPO phases. Quantitatively, the results indicate that the modulation of the ENSO amplitude by the SSS interdecadal variability is -15%-28% during negative IPO phases and -30%-20% during positive IPO phases, respectively. Evidently, the SSS interdecadal variability associated with IPO and its modulation on ENSO amplitude in the tropical Pacific are among factors essentially contributing ENSO diversity.
关键词	El Nino-Southern Oscillation (ENSO) amplitude Interdecadal Pacific Oscillation (IPO) ocean salinity variability tropical Pacific upper-ocean stratification
DOI	10.1007/s00343-023-3129-y
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42030410] ; Laoshan Laboratory[LSKJ202202403] ; Startup Foundation for Introducing Talent of NUIST
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:001196409300003
出版者	SCIENCE PRESS
WOS关键词	FRESH-WATER FLUX ; EL-NINO ; TROPICAL PACIFIC ; DECADAL OSCILLATION ; BARRIER LAYER ; ATMOSPHERIC TELECONNECTIONS ; ASYMMETRIC MODULATION ; SOUTHERN-OSCILLATION ; FREQUENCY ASYMMETRY ; NORTH PACIFIC
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185095
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Rong-Hua
作者单位	1.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing 210044, Peoples R China 3.Laoshan Lab, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys IAP, State Key Lab Numer Modeling Atmospher Sci & Geoph, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 6.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Zhi, Hai,Wang, Xiaokun,Zhang, Rong-Hua,et al. Salinity effect-induced ENSO amplitude modulation in association with the interdecadal Pacific Oscillation[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2024:18.
APA	Zhi, Hai,Wang, Xiaokun,Zhang, Rong-Hua,Lin, Pengfei,&Qi, Jifeng.(2024).Salinity effect-induced ENSO amplitude modulation in association with the interdecadal Pacific Oscillation.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,18.
MLA	Zhi, Hai,et al."Salinity effect-induced ENSO amplitude modulation in association with the interdecadal Pacific Oscillation".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2024):18.