Spatial distribution of marine chemicals along a transect from Zhongshan Station to the Grove Mountain area, Eastern Antarctica

This study investigates the regional distribution of marine aerosol originated species （Na＋, CI-, nss-SO42- and MSA） in the snow pits （or firn cores） collected along a transect between Zhongshan Station and the Grove Mountain area （450 km inland） on the eastern side of the Lambert Glacier Basin. Con...

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Bibliographic Details
Published in:Science China. Earth sciences 2014-10, Vol.57 (10), p.2366-2373
Main Authors: Qin, Xiang, Li, ChuanJin, Xiao, CunDe, Hou, ShuGui, Ding, MingHu, Ren, JiaWen, Qin, DaHe
Format: Article
Language:English
Subjects:
Atmospheric aerosols
Chemical oceanography
Correlation coefficient
Earth and Environmental Science
Earth Sciences
Firn
Glaciers
Ions
Mountain regions
Research Paper
Spatial distribution
Sulfur
东南极洲
中山站
内陆地区
格罗夫山地区
浓度指数
海洋化工
离子沉积
空间分布
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Summary:This study investigates the regional distribution of marine aerosol originated species （Na＋, CI-, nss-SO42- and MSA） in the snow pits （or firn cores） collected along a transect between Zhongshan Station and the Grove Mountain area （450 km inland） on the eastern side of the Lambert Glacier Basin. Concentrations of Na＋ and Cl- decrease exponentially with distance from the coast to 100 km inland （i.e., 1500 m a.s.1.）. Statistical results demonstrate that distance from the coast inland and elevation af-fect the concentration of sea-salt originated ions in inland areas significantly. Increase of Cl-/Na＋ ratio and higher variability in its standard deviation suggest that there are other sources of ions in addition to sea-salt in inland areas of the Antarctic conti- nent. The concentrations of Na＋ and Cl- from nine sampling sites in the Grove Mountain area are relatively higher than those from sites along CHINARE transect, although all sites are at similar distance inland. This phenomenon indicates that the barri- er effect of the mountain may be the most important factor influencing ion deposition. In addition, nss-SO42- and MSA vary differently, with nss-SO42- decreasing with distance more significantly. This implies that sources and transporting pathways influence the deposition of the two sulfur compounds considerably, being supported by the spatial pattern of correlation coeffi- cients between the nss-SO42- and MSA.
ISSN:1674-7313
1869-1897
DOI:10.1007/s11430-014-4907-3