Spatial and temporal variability of the marine originated matters along the transect route from Zhongshan Station to Dome A, Eastern Antarctica

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• 作者：Chuanjin LiCunde XiaoGuitao ShiMinghu DingDahe QinJiawen Ren
• 会议时间：2014-10-01
• 作者单位：Chuanjin Li,Dahe Qin,Jiawen Ren(The State Key Laboratory of the Cryospheric Sciences, the Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China)Cunde Xiao,Minghu Ding(The State Key Laboratory of the Cryospheric Sciences, the Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China;Climate System Institute, Chinese Academy of Meteorological Sciences, Beijing 100081, China)Guitao Shi(Polar Research Institute of China, Shanghai, 200136, China)
• 母体文献：第一届中国大地测量和地球物理学学术大会论文集
• 会议名称：第一届中国大地测量和地球物理学学术大会
• 会议地点：北京
• 主办单位：中国测绘学会
• 语种：chi

摘要

Spatiotemporal distribution pattern of the marine originated matters on Antarctica ice sheet was useful to study the variations of sources regions,transporting mechanisms and post-depositional influences.Sea salt ions (Na+,Cl-,Mg2+),sulfur components (nssSO42- and MSA) and stable water isotopes (δD and δ18O) from surface and snow pit samples collected along the transect route from Zhongshan Station to Dome A during the austral summer in 2012-2013 were presented.General decreasing trend of the accumulation,sea salt ions and sulfur components accompanying with the increase of the distance from the coast and elevation were detected.However,different sources of the marine components,transporting pathways and post-depositional influences were responsible for their different spatial distribution pattern.Seasonal variations of the marine ions at the coastal snow pit with higher sea salt ion concentrations in winter and lower in summer and the opposite style for the sulfur compounds were found.Sea ice area surrounded Antarctica was the main source region for the sea salt deposition and the open sea water for the sulfur compounds.No significant variation trend of the marine originated components was detected during the past 3 decades.Several elevated deposition of sea salt ions were associated with lower temperature (δD and δ18O) or intensified wind field.Opposite distribution pattern for sulfur concentrations from sea salt ions were also detected and this was associated through the change of the sea ice extent surrounded.