Influence of global warming and human activity on mercury accumulation patterns in wetlands across the Qinghai-Tibet Plateau  

作　　者：Xinbin Feng Xun Wang Longyu Jia Wei Yuan Meng Lu Nantao Liu Fei Wu Xinyuan Cai Feiyue Wang Che-Jen Lin 

机构地区：[1]State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Ecology and Environmental Science,Yunnan University,Kunming 650091,China [4]Centre for Earth Observation Science,and Department of Environment and Geography,University of Manitoba,Winnipeg,MB R3T 2N2,Canada [5]Center for Advances in Water and Air Quality,Lamar University,Beaumont,TX 77710,USA

出　　处：《National Science Review》2025年第1期74-84,共11页国家科学评论(英文版)

基　　金：supported by the National Natural Science Foundation of China(42122053 and 32160288);the Guizhou Provincial Science and Technology Project(CXTD[2023]023);the Second Tibetan Plateau Scientific Expedition and Research(STEP)program(2019QZKK0308).

摘　　要：Wetlands in the Qinghai-Tibet Plateau are a unique and fragile ecosystem undergoing rapid changes.We show two unique patterns of mercury(Hg)accumulation in wetland sediments.One is the‘surface peak’in monsoon-controlled regions and the other is the‘subsurface peak’in westerly-controlled regions.The former is attributed to the combined effects of increasing anthropogenic emissions and climate-induced changes in the cryosphere and wetland hydrology in the last 100−150 years.The climate changes in westerly-controlled regions in the last 50−70 years led to a fluctuation in hydrology and Hg peak in the sediment subsurface.The increase in legacy Hg input from soil erosion has largely enhanced the Hg accumulation rate in wetlands since the 1950s,especially in the proglacial wetlands.We highlight that accelerated glacier melting and permafrost thawing caused by global warming have altered geomorphology and hydrology,and affected Hg transport and accumulation in wetlands.

关 键 词：mercury pollution WETLAND Tibetan Plateau ISOTOPES sediment 

分 类 号：X51[环境科学与工程—环境工程]