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Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change
Jia, Qi1,3; Li, Tiegang2,3,4; Xiong, Zhifang2,4; Steinke, Stephan5; Jiang, Fuqing1,4; Chang, Fengming1,4; Qin, Bingbin2
2018-03-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume493Pages:44-54
Corresponding AuthorLi, Tiegang(tgli@fio.org.cn) ; Xiong, Zhifang(zhfxiong@fio.org.cn)
AbstractEl Nino/Southern Oscillation (ENSO) events and latitudinal shifts of the Intertropical Convergence Zone (ITCZ) cause large scale hydrologic changes in the western tropical Pacific (WTP). However, there is still a debate on the role of ENSO and ITCZ shifts on the hydroclimate in the WTP and their linkage to Northern Hemisphere climate change on glacial-interglacial timescales. For that reason, we present ice volume-corrected seawater delta O-18 (delta O-18(sw-ice), a proxy for salinity) and sea surface temperature (SST) records from IMAGES Core MD06-3047B recovered from the northern WTP to investigate the hydroclimate in the WTP during the last 700 kyr. Planktic foraminifera Globigerinoides ruber based Mg/Ca-SST and delta O-18(sw-ice) the records reveal distinct glacial-interglacial variations. The delta O-18(sw-ice) record shows that our study site is characterized by fresher conditions and thus higher precipitation during glacials than during interglacials. Our results are in good agreement with numerical model simulations, which also suggest a glacial freshening in the northern WTP. A glacial freshening of the WTP is most likely related to a substantial weakening of the Atlantic Meridional Overturning Circulation (AMOC) and/or exposure of the Maritime Continent due to sea level changes which resulted in an enhanced Pacific Walker circulation and/or southward shift of the ITCZ. In addition, SST records from the WTP and the eastern tropical Pacific (ETP) suggest an enhanced tropical Pacific zonal SST gradient and thus La Nina-like conditions, which may have contributed to fresher conditions in the WTP during glacial periods. Besides, our rainfall record is in antiphase to the Chinese speleothem delta O-18 records, supporting the idea of an opposing trend in precipitation changes between the WTP and East Asia on orbital timescales.
KeywordWestern Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC
DOI10.1016/j.palaeo.2017.12.039
Indexed BySCI
Language英语
Funding ProjectOpen Fund of Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0205] ; National Natural Science Foundation of China[41230959] ; National Natural Science Foundation of China[41106042] ; National Natural Science Foundation of China[41576051] ; National Natural Science Foundation of China[41776065] ; National Natural Science Foundation of China[41576050] ; National Special Project for Global Change and Air-Sea Interaction[GASI-GEOGE-04]
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000425071100005
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158082
Collection海洋地质与环境重点实验室
Corresponding AuthorLi, Tiegang; Xiong, Zhifang
Affiliation1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
5.Xiamen Univ, Coll Ocean & Earth Sci, Dept Geol Oceanog, Xiamen 361102, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
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Jia, Qi,Li, Tiegang,Xiong, Zhifang,et al. Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2018,493:44-54.
APA Jia, Qi.,Li, Tiegang.,Xiong, Zhifang.,Steinke, Stephan.,Jiang, Fuqing.,...&Qin, Bingbin.(2018).Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,493,44-54.
MLA Jia, Qi,et al."Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 493(2018):44-54.
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