Simulation of the Decadal Permafrost Distribution on the Qinghai-Tibet Plateau (China) over the Past 50 Years

2012 ◽  
Vol 23 (4) ◽  
pp. 292-300 ◽  
Author(s):  
Cheng Weiming ◽  
Zhao Shangmin ◽  
Zhou Chenghu ◽  
Chen Xi
Keyword(s):  
Tibet Plateau ◽  
The Past ◽  
Qinghai Tibet Plateau

scholarly journals A High–Resolution Accumulation Record of Arsenic and Mercury after the First Industrial Revolution from a Peatland in Zoige, Qinghai–Tibet Plateau

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1241
Author(s):  
Xuhui Chen ◽  
Qianqian Su ◽  
Huai Chen ◽  
Dan Xue
Keyword(s):  
Industrial Development ◽  
Industrial Revolution ◽  
Tibet Plateau ◽  
Anthropogenic Emissions ◽  
Accumulation Rates ◽  
Future Studies ◽  
210Pb And 137Cs ◽  
The Past ◽  
Peat Profile ◽  
Qinghai Tibet Plateau

The impacts of human activities on Zoige peatlands are poorly documented. We determined the concentrations and accumulation rates of As and Hg in a 210Pb-dated peat profile collected from this area and analyzed the correlations between accumulation rates of both As and Hg and other physicochemical properties. To reconstruct recent conditions of As and Hg, we analyzed peat sediments of Re’er Dam peatland in Zoige using 210Pb and 137Cs dating technologies. The concentrations of total As (86.38 to 174.21μg kg−1) and Hg (7.30 to 32.13 μg kg−1) in the peat profile clearly increased after the first industrial revolution. From AD 1824 to AD 2010, the average accumulation rates were 129.77 μg m−2 yr−1 for As and 18.24 μg m−2 yr−1 for Hg. Based on our results, anthropogenic emissions significantly affected the atmospheric fluxes of As and Hg throughout the past 200 years, and As was also likely to be affected by other factors than atmospheric deposition, which needs further identification by future studies. The historical variations in As and Hg concentrations in Re’er Dam peatland in Zoige mirror the industrial development of China.

scholarly journals Sedimentary succession and recognition marks of lacustrine gravel beach-bars, a case study from the Qinghai Lake, China

2020 ◽  
Vol 12 (1) ◽  
pp. 59-70
Author(s):  
Biao Peng ◽  
Jichang Han ◽  
Xiao Xie ◽  
Luyao Wang
Keyword(s):  
Tibet Plateau ◽  
Qinghai Lake ◽  
Lake Qinghai ◽  
The Past ◽  
Sedimentary Succession ◽  
Plane View ◽  
Qinghai Tibet Plateau ◽  
Gravel Beach ◽  
Beach Bar

AbstractThe present is the key to the past. Based on the dissection of modern beach-bars in the Qinghai Lake, Qinghai-Tibet Plateau, China, including two profiles parallelly to the shoreline, two profiles vertically to the shoreline and one plane-view profile, the sedimentary succession and recognition marks of lacustrine gravel beach-bars have been summarized. Vertically, the lacustrine gravel beach-bars develop with the “ABC” succession. The A interval, the B interval, and the C interval respectively correspond with the gravelly sand facies, the well-sorted gravel facies, and the graded sand facies. The lacustrine gravel beach-bars is composed of several combinations of the “ABC” succession, such as “ABAB”, “ABCABC”, “BCBC”. The main recognition marks of lacustrine gravel beach-bars is the following: the bottom contact is distinct and with the “ABC” succession; and the lacustrine beach-bars develop the swash bedding and sheet-like parallelly to the lakeshore. These viewpoints have significant contributions to the reconstruction of paleoenvironments and paleoshorelines and to the reservoir interpretation within lacustrine beach-bar clastic bodies.

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