Late Quaternary East Asian Monsoon variability in the South China Sea: Evidence from planktonic foraminifera faunal and hydrographic gradient records

Yu, Pai‐Sen; Huang, Chen‐Fen; Chin, Yu Ping; Mii, Horng‐Sheng; Chen, Min‐Te

doi:10.1016/j.palaeo.2005.11.038

Cited by 28 publications

(35 citation statements)

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“…The abundances of N. dutertrei and N. pachyderma-R as indicated by Factor 1 loadings were relatively high in some broad time intervals of cold periods near~22, 45, 71, and 94 kya, when Northern Hemisphere summer insolation levels were low. The fauna assemblages are primarily indicative of East Asian winter monsoon strength, which was driven by a "cross-hemisphere flow" mechanism proposed by Yu et al (2006); 3. The abundances of G. inflata as indicated by Factor 3 loadings showed abruptly high values at short cooling episodes centered at~11, 33, 59, and 83 kya.…”

Section: Discussionmentioning

confidence: 94%

“…Although paleoclimatic studies of East Asian summer/ winter monsoon have produced a wide range of results from terrestrial (Chinese loess and stalagmite) and marine cores (clay minerals, micro-charcoal abundances, microfossil assemblages) (Beaufort et al 2003;Liu et al 2003;Yuan et al 2004;Sun et al 2005;Yu et al 2006), little is known about the summer/winter monsoon signals recorded in marine microfossils, especially in planktic foraminifer assemblages. Previous SCS studies only suggest that ice-volume forcing/sea level is a primary factor in determining the strength and timing of the East Asian monsoon (Jian et al 2001;Huang et al 2002).…”

Section: Discussion 51 Planktic Foraminifer Assemblages and East Asimentioning

confidence: 99%

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Late Quaternary Planktic Foraminifer Fauna andMonsoon Upwelling Records from the Western South China Sea, Near the Vietnam Margin (IMAGESMD012394)

Yu¹,

Mii²,

Chen³

2008

Terr. Atmos. Ocean. Sci.

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Marine sediment core MD012394 from the Vietnam coastal upwelling area in the western South China Sea was investigated in order to reconstruct the last Quaternary monsoon upwelling based on planktic foraminifer fauna assemblages and fauna-based sea surface temperature (SST) estimates. The age model of core MD012394 was constructed using oxygen isotope stratigraphy of the planktic foraminifer G. sacculifer, with 10 accelerator mass spectrometry (AMS) 14 C dating of planktic foraminifers from the sediment samples. Our studies on the relative and absolute abundances of planktic foraminifer assemblages reveal eight dominant species in core MD012394: N. dutertrei + N. pachyderma (right coiling), G. ruber, G. glutinata, G. sacculifer, P. obliquiloculata, G. menardii + G. tumida, G. calida, and G. inflata. In a Q-mode factor analysis of the fauna abundance data, the fauna factors show variations that do not parallel the glacial/interglacial changes throughout the last 135 kyr. The relative abundance patterns of G. inflata and N. dutertrei (including N. pachyderma-R) are interpreted as hydrographic proxies for East Asian summer and winter monsoon, respectively, in the current study. We calculated the fluctuations in the SST using the Revised Analog Method (RAM) in MD012394 and found that the abundance changes of the summer monsoon upwelling indicator G. inflata were similar and nearly synchronous. This suggests that the summer monsoon-driven upwelling signal was strong near the local summer insolation maximum, which induced low SSTs, particular around~11, 33, 59, and 83 kya. Our studies support the view that the strengths of both summer insolation and the East Asian summer monsoon have determined the relative abundance of planktic foraminifers and the SSTs in the western SCS during the last 135 kyr.Key words: South China Sea, Planktonic foraminifer fauna, Sea surface temperature, East Asian monsoon, Summer insolation Citation: Yu, P. S., H. S. Mii, M. Murayama, and M. T. Chen, 2008: Late quaternary planktic foraminifer fauna and monsoon upwelling records from the

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Section: Discussionmentioning

confidence: 94%

Section: Discussion 51 Planktic Foraminifer Assemblages and East Asimentioning

confidence: 99%

Late Quaternary Planktic Foraminifer Fauna andMonsoon Upwelling Records from the Western South China Sea, Near the Vietnam Margin (IMAGESMD012394)

Yu¹,

Mii²,

Chen³

2008

Terr. Atmos. Ocean. Sci.

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“…Benthic foraminifera (Jian et al 2001) and radiolaria (Gupta 1999;Chen et al 2003) have also been used as upwelling indicators. Yu et al (2006c) defined warm and cold water species factors based on analyses of planktonic foraminifera assemblages and calculated a ratio of these two factors as a hydrographic index. When using these micropaleontological proxies it is important to be aware of potential complications associated with factors such as dissolution and nutrient levels in upwelled waters ).…”

Section: Micropaleontological Proxies-foram Radiolarian Profunda Pmentioning

confidence: 99%

“…SST records from the Indian Ocean (Emeis et al 1995) and SCS ) have both been used as indirect indicators of monsoonal changes. SST gradients between two selected sites in the SCS have been used as monsoon indicators as well (Yu et al 2006c;Tian et al 2010).…”

Section: Geochemical Proxiesmentioning

confidence: 99%

“…The third group has very strong spectral power at the 23-ka band, with relatively little 41-ka and 100-ka spectral power. Representative records include: 1) a primary productivity record from the southeastern Arabian Sea (Rostek et al 1997), and 2) the planktonic foraminifer hydrographic index (Yu et al 2006c). The last two records should be interpreted with caution as they span less than 2 glacial-interglacial cycles (~ 200 ka).…”

Section: Orbital Variabilitymentioning

confidence: 99%

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Asian Monsoon Variability Recorded in Other Archives

Cai

Jin

Zhou

et al. 2014

Late Cenozoic Climate Change in Asia

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This chapter provides an extensive review of paleomonsoon variability on millennial-to decadal time scales in various archives other than loess, including speleothems, lake sediments, peat deposits, desert deposits, marine sediments, corals, ice cores, tree rings, pollen archives and historical documents. Case studies will be presented to introduce the major proxy indexes associated with these archives, and the reconstructed history of Asian monsoon variability. Advances in the study of monsoon variability and the peculiarity of different archives will also be introduced in this chapter.Keywords Speleothems · Lake sediments · Peat · Desert · Marine sediments · Coral · Ice cores · Tree ring · Pollen · Historical documents Overview of Various Paleoclimate ArchivesAs described in the previous chapter, the eolian loess sequence, a unique geological archive in the world, plays an important role in studying the climatic and environmental changes in China as it documents the variability of both Asian monsoon and the aridification of inland Asia. It has the advantages of being relatively continuous and long-lasting for studying the monsoon changes and inland aridifications on tectonic and orbital time scales, and even has the potential for studies of monsoon variations on millennial time scales at some sites. However, other geo-biological archives and historical records are also essential in studying the Asian monsoon changes, as they provide indispensable information for fully understanding Asian monsoon changes and its dynamic forces and environmental effects, especially on the millennial to decadal time scales. For example, taking advantage of high-precision absolute U-series dating, speleothems from karst caves, provide the ages of the abrupt events that occurred within the Asian monsoon regions and make it possible to correlate these events with global climate changes, enhancing greatly our understanding of the linkage between Asian monsoon and global climate change. With multiple proxies, lake sediments are good at providing the integrated information on hydrology, weathering processes, biomass and other aspects within the drainage systems. Coral records may indicate the changes in moisture supply from the tropical ocean, ocean circulation, sea surface temperature and other parameters linked closely with monsoon climate. Tree-ring records provide annual changes of regional temperature, precipitation and the hydrological environment, and are the basis to fully describe the present global warming and the anthropogenic contribution. As the direct index of vegetation, pollen assemblages indicate the succession of vegetation associated with monsoon changes, revealing variations in moisture availability and temperature. Therefore, studies of these various archives, as well as peatbogs, ice cores, marine and desert deposits and historical records, greatly expanded our knowledge of the variability of Asian monsoons and their driving forces.This chapter will focus on various archives used in the study of Asian mon...

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Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

Shiau

Chen

Huh

et al. 2012

J Quaternary Science

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The Australian summer monsoon (ASM) is primarily a synoptic feature determined by the differential thermal response to solar insolation between the Australian continent and the western Pacific warm pool (WPWP) in austral summer. Little is known about the process involved in driving long‐term ASM variability. Here we present a 180 ka record of terrestrial fluxes into offshore southeastern Papua New Guinea (PNG), a prevailing monsoon area in the WPWP. Terrestrial fluxes were estimated by a 230Th‐normalized method, indicating higher terrestrial inputs into the ocean during glacial stages. We argue that the higher terrestrial fluxes are mainly fluvial, which in turn are linked to stronger ASM precipitation on land, though the increased terrestrial flux could possibly also be due to the lowstand or glacial erosion of mountain glaciers. Cross‐spectral analysis indicates that the ASM precipitation maxima are controlled by local summer insolation maxima, WPWP sea‐surface temperature minima and East Asian winter monsoon (EAWM) maxima in precession frequency bands (21 ka−1). This result suggests that the 21 ka components of the ASM in the past 180 ka are not only insolation driven but also a dynamic component strengthened by cross‐hemispheric pressure gradient resulted from the precession maxima forcing. Copyright © 2012 John Wiley & Sons, Ltd.

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Late Quaternary East Asian Monsoon variability in the South China Sea: Evidence from planktonic foraminifera faunal and hydrographic gradient records

Cited by 28 publications

References 42 publications

Late Quaternary Planktic Foraminifer Fauna andMonsoon Upwelling Records from the Western South China Sea, Near the Vietnam Margin (IMAGESMD012394)

Late Quaternary Planktic Foraminifer Fauna andMonsoon Upwelling Records from the Western South China Sea, Near the Vietnam Margin (IMAGESMD012394)

Asian Monsoon Variability Recorded in Other Archives

Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

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