| Compound-specific carbon isotope compositions of individual long-chain n-alkanes in severe Asian dust episodes in the North China coast in 2002 |
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| 作者姓名： | GUO Zhigang LI Juyuan FENG Jialiang FANG Ming YANG Zuosheng |
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| 作者单位： | [1]College of Marine Geosciences, Ocean University of China, Qingdao 266003, China [2]Institute of Geology, Shengli Oil-field Company, Petrochemical Corporation of China, Dongying 257015, China [3]Institute for Environment and Sustainable Development, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon,Hong Kong, China |
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| 基金项目： | Acknowledgements The authors greatly thank anonymous reviewers for their constructive suggestions on this paper and Dr. Sheng, L. F. of 0cean University of China for her help in collecting the samples. This work was supported by the National Natural Science Foundation of China （Grant Nos： 40276016, 90211022）. |
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| 摘 要： | Asian dust storms originating from the arid regions of central and eastern Asia and from the Loess Plateau in China frequently occur in spring 1,2]. Driven by the East Asian monsoon, Asian dust can be transported to northern Pacific Ocean2―8]. Asian du…
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| 关 键 词： | 亚洲尘暴 华北地区 碳同位素 GC-MS GC-IRMS |
| 收稿时间： | 2005-08-17 |
| 修稿时间： | 2005-08-172005-09-27 |
Compound-specific carbon isotope compositions of individual long-chain n-alkanes in severe Asian dust episodes in the North China coast in 2002 |
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| GUO Zhigang LI Juyuan FENG Jialiang FANG Ming YANG Zuosheng.Compound-specific carbon isotope compositions of individual long-chain n-alkanes in severe Asian dust episodes in the North China coast in 2002[J].Chinese Science Bulletin,2006,51(17):2133-2140. |
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| Authors: | Zhigang Guo Juyuan Li Jialiang Feng Ming Fang Zuosheng Yang |
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| Institution: | (1) College of Marine Geosciences, Ocean University of China, Qingdao, 266003, China;(2) Institute of Geology, Shengli Oil-field Company, Petrochemical Corporation of China, Dongying, 257015, China;(3) Institute for Environment and Sustainable Development, Hong Kong, University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China |
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| Abstract: | The molecular compositions and compound-specific carbon isotope compositions of individual long-chain n-alkanes of atmospheric aerosols collected during two severe Asian dust episodes in Qingdao in spring of 2002 were analyzed
using gas chromatography/mass spectrometry (GC/MS) and gas chromatography/isotope ratio mass spectrometry (GC/IRMS). Typical
plant wax n-alkanes (C29 and C31) had lower δ13C values than those from anthropogenic (engine exhaust) sources (C21-C23). The average δ13C value of plant wax n-alkane C29 in non-dust episode periods was −30.5‰ (−30.3‰–−31.9‰), while −31.3‰ (−31.1‰–−31.5‰) in dust episode periods; for C31, it was −31.4‰ (−31.1‰–−33.0‰) in non-dust episode periods, and −31.7‰ (−31.3‰–−32.6‰) in dust episode periods. Plant wax
in the dust episode samples was mainly from herbaceous plants via long-range transport, while local plant wax was mainly from
deciduous plants and woody plants. In North China coast, 83.3% of the plant wax in the severe dust episode samples was from
C3 plants while 80.0% for the non-dust samples, indicating that plant wax transported to the northwestern Pacific Ocean by airborne
dust from East Asia was mainly from C3 plants. The results suggest that the molecular and molecular-isotopic compositions of individual long-chain n-alkanes can, as an effective indicator, identify the terrestrial organic components in the dust from East Asia and sediments
in the northwest Pacific Ocean. |
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| Keywords: | Asian dust storm plant wax compound-specific carbon isotope composition of individual n-alkanes C3 plants North China coast |
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