Thermocline variability in the subtropical northwestern Pacific since the last deglaciation

doi:10.1016/j.palaeo.2022.111379

IOCAS-IR > 海洋地质与环境重点实验室

	Thermocline variability in the subtropical northwestern Pacific since the last deglaciation
	Qian, Fang1,3 ; Chang, Fengming 1,2; Li, Tiegang2,4 ; Li, Anchun 1,2; Sun, Hanjie 1; Zhang, Junru 1,3
	2023-02-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	612 页码:12
通讯作者	Chang, Fengming(chfm@qdio.ac.cn) ; Li, Tiegang(tgli@fio.org.cn)
摘要	Thermocline conditions in the tropical western Pacific are closely linked to regional- and basin-scale hydrological variation and may have played a critical role in global climate evolution on various timescales. However, longterm changes in thermocline hydrology in the subtropical northwestern Pacific and their connection to the tropical Pacific remain unclear. Based on planktonic foraminiferal Mg/Ca and delta(18O), we reconstructed the temperature and salinity of thermocline water since the last deglaciation, using core OKI02 from the Okinawa Trough (OKT) in the subtropical northwestern Pacific. The results indicated a discrepancy in evolution of both temperature and delta O-18 between the thermocline and surface water over the past 19 ka. Unlike for surface water, changes in thermocline hydrology correlated with changing conditions in the tropical western Pacific, indicating a close relationship between these regions since the last deglaciation. Thermocline temperature and salinity gradients between the OKT and the tropical western Pacific increased from similar to 16.5 to 10 ka BP, reached their maximum values at approximately 10 ka BP, and then decreased from the Early Holocene to present. Variations in temperature and salinity gradients correlated with changes in the El Nino-Southern Oscillation (ENSO) over the past 19 ka, which were coupled with equatorial summer insolation variations. We suggest that the ENSO-like process, forced by equatorial summer insolation, regulated thermocline dynamics in the subtropical northwestern Pacific Ocean since the last deglaciation, by influencing the strength of the Kuroshio Current.
关键词	Subtropical Northwestern Pacific Last deglaciation Thermocline hydrology ENSO-like process Kuroshio current
DOI	10.1016/j.palaeo.2022.111379
收录类别	SCI
语种	英语
资助项目	Special funds of Shandong Province for Laoshan Laboratory[LSKJ202204201] ; National Natural Science Foundation of China[42076051] ; National Natural Science Foundation of China[41876068] ; National Natural Science Foundation of China[41830539] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; China Scholarship Council[202104910295]
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000978054800001
出版者	ELSEVIER
WOS关键词	MIDDLE OKINAWA TROUGH ; WESTERN EQUATORIAL PACIFIC ; NINO-SOUTHERN OSCILLATION ; EL-NINO ; TROPICAL PACIFIC ; OXYGEN-ISOTOPE ; WARM POOL ; FORCING MECHANISMS ; GLOBAL CLIMATE ; SEA-LEVEL
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182946
专题	海洋地质与环境重点实验室
通讯作者	Chang, Fengming; Li, Tiegang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.MNR, Inst Oceanog 1, Key Lab Marine Geol & Metallogeny, Qingdao 266061, Peoples R China
第一作者单位	中国科学院海洋研究所
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	Qian, Fang,Chang, Fengming,Li, Tiegang,et al. Thermocline variability in the subtropical northwestern Pacific since the last deglaciation[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2023,612:12.
APA	Qian, Fang,Chang, Fengming,Li, Tiegang,Li, Anchun,Sun, Hanjie,&Zhang, Junru.(2023).Thermocline variability in the subtropical northwestern Pacific since the last deglaciation.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,612,12.
MLA	Qian, Fang,et al."Thermocline variability in the subtropical northwestern Pacific since the last deglaciation".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 612(2023):12.