Pedogenic Characteristics of Liaowadian Holocene Loess Profile in the Upper Hanjiang River Valley of China and Its Response to Climate Change

Cui Tianyu; Pang Jiangli; Huang Chunchang; Zha Xiaochun; Zhou Yali; Wu Shuaihu; Yang Jianchao

doi:10.7522/j.issn.1000-694X.2014.00150

2015 , Vol. 35 >Issue 3: 610 - 615

DOI: https://doi.org/10.7522/j.issn.1000-694X.2014.00150

Pedogenic Characteristics of Liaowadian Holocene Loess Profile in the Upper Hanjiang River Valley of China and Its Response to Climate Change

Cui Tianyu ,
Pang Jiangli ,
Huang Chunchang ,
Zha Xiaochun ,
Zhou Yali ,
Wu Shuaihu ,
Yang Jianchao

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College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China

Received date: 2014-08-19

Revised date: 2014-10-09

Online published: 2015-05-20

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Abstract

The Liaowadian (LWD) profile in Yunxian, Hubei of China was surveyed in details. Investigations into this soil profile, including pedo-stratigraphy, chronology, were carried over the first river terrace of the upper Hanjiang River valley. Magnetic susceptibility, particle-size distribution, the contents of Rb and Sr were analyzed in laboratory. The result shows that LWD profile recorded the environment features and evolution with the stratigraphic series TS-L₀-S₀-L_t-L₁. Different degree of weathering intensity in different stratigraphic units is paleosol S₀ > Holocene loess L₀ > modern TS>transitional loess layer L_t > Malan loess layer L₁. The climate was dry and cold before 11 500 a BP and dust falls led to the formation of Malan loess layer L₁. And between 11 500 a BP and 8 500 a BP, the climate got warmer, and was characterized by dry and wet, and dust falls led to the formation of Transitional loess layer L_t. During 8 500 a BP to 3 100 a BP, Yunxian basin experienced its warmest period with a warm and humid climate during Holocene, and dust falls led to the formation of S₀. During the late Holocene, namely 3 100 a BP, the climate was deteriorating very quickly. It turned from warm to cold, and precipitation began to decline.

Key words： loess-paleosol sequence; weathering degree; climate change; Liaowadian

Cite this article

Cui Tianyu , Pang Jiangli , Huang Chunchang , Zha Xiaochun , Zhou Yali , Wu Shuaihu , Yang Jianchao . Pedogenic Characteristics of Liaowadian Holocene Loess Profile in the Upper Hanjiang River Valley of China and Its Response to Climate Change[J]. Journal of Desert Research, 2015 , 35(3) : 610 -615 . DOI: 10.7522/j.issn.1000-694X.2014.00150

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