Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation

doi:10.1016/j.palaeo.2011.12.007

	Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation
	Yang, Shiling; Ding, Zhongli; Wang, Xu; Tang, Zihua; Gu, Zhaoyan
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2012-02-01
卷号	317 页码:32-40
关键词	Chinese loess Pedogenic carbonate East-Asian summer monsoon Stable isotopes C-3/C-4 vegetation Precipitation seasonality
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2011.12.007
文献子类	Article
英文摘要	Evaluating how future climate changes may impact C-3/C-4 biomass in East Asia depends largely on the understanding of the relationship between past C-3/C-4 variations and Asian monsoon circulation. The glacial-interglacial variations in C-3/C-4 biomass have been readily ascribed to the summer monsoon. However, the internal processes governing the link of C-3/C-4 vegetation to the Asian monsoon have not been clearly described. Here we present isotopic results of pedogenic carbonate from northern China for the Holocene, the last and penultimate interglacial periods. Comparison of the observed and predicted delta O-18 values of modern soil carbonate from gravelly soils suggests that pedogenic carbonate forms mainly in warm, rainy season. Carbonate nodules from the Chinese loess demonstrate a distinct negative delta O-18-delta C-13 relationship and a wider scatter of isotopic values in the southern Loess Plateau than in the northern part. By combining rainfall, delta O-18 of precipitation and the peak of C-3 and C-4 plant metabolism, we develop a conceptual model to explain the isotopic signatures of the carbonate nodules. Our model shows that a narrowly-focused season of monsoon precipitation at a specific site produces low delta O-18 values of soil water and simultaneously favors C-4 over C-3 plants. Our model further suggests that the scattered isotopic values of soil carbonate reflect a strong summer monsoon while the focused values indicate a weak summer monsoon. delta C-13 values of soil carbonate indicate a striking pattern of northward-increasing C-4 vegetation for the last interglacial, while a flat spatial pattern is seen for the penultimate interglacial and the Holocene. It is inferred that the summer monsoon was stronger during the last interglacial than during the penultimate interglacial and the Holocene, leading to a northward displacement of C-3 forest ecosystems into the southern Loess Plateau. In addition, an in-phase relationship between intra-nodule delta C-13 and delta O-18 values suggests a strong and possibly rapid response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation. In this context, if the last interglacial period (MIS 5) is taken as an analog for the projected near future, then C-3 plants may be favored in the south while C-4 plants may be efficient in the north. (C) 2011 Elsevier B.V. All rights reserved.
WOS关键词	GLACIAL-INTERGLACIAL CYCLES ; LOESS PLATEAU ; ISOTOPIC COMPOSITION ; SUMMER MONSOON ; PLANT ABUNDANCE ; ORGANIC-CARBON ; SOIL-MOISTURE ; VEGETATION ; CLIMATE ; C-3
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000301212300004
资助机构	National Basic Research Program of China (973 Program)(2010CB950204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; National Natural Science Foundation of China(40972228) ; National Natural Science Foundation of China(40972228) ; XDA05120204) ; XDA05120204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; National Natural Science Foundation of China(40972228) ; National Natural Science Foundation of China(40972228) ; XDA05120204) ; XDA05120204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; National Natural Science Foundation of China(40972228) ; National Natural Science Foundation of China(40972228) ; XDA05120204) ; XDA05120204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; National Basic Research Program of China (973 Program)(2010CB950204) ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; Chinese Academy of Sciences(KZC2-YW-Q1-03 ; National Natural Science Foundation of China(40972228) ; National Natural Science Foundation of China(40972228) ; XDA05120204) ; XDA05120204)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84064]
专题	中国科学院地质与地球物理研究所
通讯作者	Yang, Shiling
作者单位	Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shiling,Ding, Zhongli,Wang, Xu,et al. Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2012,317:32-40.
APA	Yang, Shiling,Ding, Zhongli,Wang, Xu,Tang, Zihua,&Gu, Zhaoyan.(2012).Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,317,32-40.
MLA	Yang, Shiling,et al."Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 317(2012):32-40.