Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment

doi:10.1002/2015GC005929

	Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment
	Xu, Zhaokai 1,2; Li, Tiegang 1; Clift, Peter D.3; Lim, Dhongil 2; Wan, Shiming 1; Chen, Hongjin 1,4; Tang, Zheng 5; Jiang, Fuqing 1; Xiong, Zhifang 1
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2015-09
卷号	16 期号:9 页码:3182-3196
ISSN号	1525-2027
DOI	10.1002/2015GC005929
英文摘要	We present a new high-resolution multiproxy data set of Sr-Nd isotopes, rare earth element, soluble iron, and total organic carbon data from International Marine Global Change Study Core MD06-3047 located in the western Philippine Sea. We integrate our new data with published clay mineralogy, rare earth element chemistry, thermocline depth, and delta C-13 differences between benthic and planktonic foraminifera, in order to quantitatively constrain Asian dust input to the basin. We explore the relationship between Philippine Sea and high-latitude Pacific eolian fluxes, as well as its significance for marine productivity and atmospheric CO2 during the mid-late Quaternary. Three different indices indicate that Asian dust contributes between similar to 15% and similar to 50% to the detrital fraction of the sediments. Eolian dust flux in Core MD06-3047 is similar to that in the polar southern Pacific sediment. Coherent changes for most dust flux maximum/minimum indicate that dust generation in interhemispheric source areas might have a common response to climatic variation over the mid-late Quaternary. Furthermore, we note relatively good coherence between Asian dust input, soluble iron concentration, local marine productivity, and even global atmospheric CO2 concentration over the entire study interval. This suggests that dust-borne iron fertilization of marine phytoplankton might have been a periodic process operating at glacial/interglacial time scales over the past 700 ka. We suggest that strengthening of the biological pump in the Philippine Sea, and elsewhere in the tropical western Pacific during the mid-late Quaternary glacial periods may contribute to the lowering of atmospheric CO2 concentrations during ice ages.
资助项目	National Basic Research Program of China[2007CB815903]
WOS关键词	ND ISOTOPIC CONSTRAINTS ; NORTHERN OKINAWA TROUGH ; EQUATORIAL PACIFIC ; SOUTHERN-OCEAN ; SEDIMENT PROVENANCE ; IRON FERTILIZATION ; TROPICAL PACIFIC ; MILLENNIAL-SCALE ; LATE PLEISTOCENE ; DISSOLVED IRON
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000365039400026
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/27384]
专题	自然资源部第一海洋研究所
通讯作者	Xu, Zhaokai
作者单位	1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao, Peoples R China 2.Korea Inst Ocean Sci & Technol, South Sea Res Inst, Geoje, South Korea 3.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.First Inst Oceanog, Key Lab State Ocean Adm Marine Sedimentol & Envir, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhaokai,Li, Tiegang,Clift, Peter D.,et al. Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2015,16(9):3182-3196.
APA	Xu, Zhaokai.,Li, Tiegang.,Clift, Peter D..,Lim, Dhongil.,Wan, Shiming.,...&Xiong, Zhifang.(2015).Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,16(9),3182-3196.
MLA	Xu, Zhaokai,et al."Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 16.9(2015):3182-3196.