气候变化领域集成服务门户(CCPortal): Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires

CCPortal

DOI	10.1029/2019JC015663
	Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires
	Xiao H.-W.; Luo L.; Zhu R.-G.; Guo W.; Long A.-M.; Wu J.-F.; Xiao H.-Y.
发表日期	2020
ISSN	21699275
卷号	125 期号:2
英文摘要	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.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186987
作者单位	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
推荐引用方式 GB/T 7714	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],2020,125(2).
APA	Xiao H.-W..,Luo L..,Zhu R.-G..,Guo W..,Long A.-M..,...&Xiao H.-Y..(2020).Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires.Journal of Geophysical Research: Oceans,125(2).
MLA	Xiao H.-W.,et al."Enhanced Primary Production in the Oligotrophic South China Sea Related to Southeast Asian Forest Fires".Journal of Geophysical Research: Oceans 125.2(2020).