scholarly journals Variation of Winter Monsoon Intensity on the Loess Plateau, Central China during the Last 130,000 Years: Evidence from Grain Size Distribution.

1992 ◽  
Vol 31 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Jule Xiao ◽  
Hongbo Zheng ◽  
Hua Zhao
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Loess Plateau ◽  
Winter Monsoon ◽  
Central China ◽  
The Loess Plateau ◽  
Monsoon Intensity ◽  
Plateau Central

Grain Size of Quartz as an Indicator of Winter Monsoon Strength on the Loess Plateau of Central China during the Last 130,000 Yr

1995 ◽  
Vol 43 (1) ◽  
pp. 22-29 ◽  
Author(s):  
Jule Xiao ◽  
Stephen C. Porter ◽  
Zhisheng An ◽  
Hisao Kumai ◽  
Shusaku Yoshikawa
Keyword(s):  
Grain Size ◽  
Magnetic Susceptibility ◽  
Loess Plateau ◽  
Winter Monsoon ◽  
Central China ◽  
Atmospheric Conditions ◽  
Dust Transport ◽  
Chinese Loess ◽  
Weathering Processes ◽  
Monsoon Strength

AbstractThe Chinese loess-paleosol sequence constitutes an important record of variations in Asian monsoon climate over the past 2.4 myr. Magnetic susceptibility of loess and paleosols has been used as a proxy for summer monsoon intensity, while median grain size has been regarded as a measure of the strength of winter monsoon winds that were responsible for most of the dust transport. However, median grain size is only an approximate index of winter monsoon strength because both paleosols and loess have been modified, to various degrees, by weathering processes that have produced pedogenic clay. The quartz component of loess and paleosols is largely unaffected by weathering processes and therefore constitutes a more reliable proxy index of monsoon wind strength. Median grain size (Qmd) and maximum grain size (Qmax) values of monomineralic quartz isolated from the loess-paleosol section at Luochuan in the central Loess Plateau are characterized by two main intervals during the last ca. 130,000 yr when these parameters were significantly greater than 9 and 85 μm, respectively, and three main intervals when they were lower. The data imply that the winter monsoon weakened during the intervals with low Qmd and Qmax values, which coincide with marine oxygen isotope stages 5, 3, and 1, and was strongest ca. 67,000 and 20,000 yr ago during isotope stages 4 and 2. However, both quartz grainsize records display second-order high-frequency, high-amplitude variations, which are lacking in the magnetic susceptibility record, that imply rapid and significant changes in atmospheric conditions that affect dust transport and deposition.

An EPR study on mollusk shells from loess-paleosol sequences in the Loess Plateau, central China

2005 ◽  
Vol 39 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Xuefen Sheng ◽  
Jun Chen ◽  
Junfeng Ji ◽  
Yunxia Sui
Keyword(s):  
Loess Plateau ◽  
Central China ◽  
The Loess Plateau ◽  
Mollusk Shells ◽  
Plateau Central

scholarly journals Magnetic grain-size distribution of the enhanced component in the loess-palaeosol sequences in the western Loess Plateau of China

2001 ◽  
Vol 145 (2) ◽  
pp. 499-504 ◽  
Author(s):  
Toshiaki Mishima ◽  
Masayuki Torii ◽  
Hitoshi Fukusawa ◽  
Yugo Ono ◽  
Xiao-Min Fang ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Loess Plateau ◽  
Western Loess Plateau
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