globalchange  > 气候变化与战略
DOI: 10.1029/2019JC015663
Title:
Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires
Author: Xiao H.-W.; Luo L.; Zhu R.-G.; Guo W.; Long A.-M.; Wu J.-F.; Xiao H.-Y.
Source Publication: Journal of Geophysical Research: Oceans
ISSN: 21699275
Publishing Year: 2020
Volume: 125, Issue:2
Language: 英语
Scopus Keyword: air-soil interaction ; biogeochemical cycle ; forest fire ; marine ecosystem ; nitrogen cycle ; nitrogen isotope ; oligotrophic environment ; primary production ; wet deposition ; Pacific Ocean ; South China Sea ; Southeast Asia
English Abstract: Atmospheric reactive nitrogen deposition is an important process in the nitrogen cycle of natural ecosystems, especially in oligotrophic oceans. Increased land-based atmospheric nitrogen deposition over the ocean changes the stoichiometric balance of marine ecosystems; this causes changes in ecosystem functions and biogeochemical cycles. Current studies have shown that atmospheric reactive nitrogen is mainly derived from land-based human activities, such as the use of fertilizers, combustion of fossil fuels, and forest fires. Forest fires can provide a vast amount of reactive nitrogen and other nutrients over short time scales and may greatly influence marine ecosystems. Here, we document a large change in nitrogen concentration and primary productivity in upper levels of the South China Sea (SCS), coincident with Indonesian forest fires between August and September of 2012. Using back trajectories, fire spot maps, geographical distributions of the smoke, vertical distributions of the depolarization ratio, and nitrogen isotope values of nitrate in rainwater, we found that the change in nitrogen could be attributed to the forest fires. Our results show that the SCS received about 180 Gg of N as wet deposition during the sampling period. This atmospheric nitrogen deposition caused high primary productivity (40.679 ± 15.852 mg C·m−2·hr−1) in the upper levels of the SCS, which tripled values recorded in other years. This suggests that high nitrogen levels as well as other nutrients derived from tropical Asian forest fires are of great importance to the marine ecosystem of the SCS and also likely affect global marine biogeochemical cycles. ©2020. American Geophysical Union. All Rights Reserved.
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被引频次[WOS]:1   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/159875
Appears in Collections:气候变化与战略

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Affiliation: Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang, China; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; School of Earth Science, University of Chinese Academy of Sciences, Beijing, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China

Recommended Citation:
Xiao H.-W.,Luo L.,Zhu R.-G.,et al. Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires[J]. Journal of Geophysical Research: Oceans,2020-01-01,125(2)
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