气候变化领域集成服务门户(CCPortal): El Niño-Driven Dry Season Flushing Enhances Dissolved Organic Matter Export From a Subtropical Watershed

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DOI	10.1029/2020GL089877
	El Niño-Driven Dry Season Flushing Enhances Dissolved Organic Matter Export From a Subtropical Watershed
	Qu L.; Wu Y.; Li Y.; Stubbins A.; Dahlgren R.A.; Chen N.; Guo W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	The 2015/2016 super El Niño event resulted in a positive precipitation anomaly during dry seasons in the Jiulong River watershed, southeast China. Four years (2014–2017) of high frequency, in situ humic-like fluorescent DOM (FDOMH) data in the Jiulong Estuary were coupled with extrapolation to a freshwater end-member FDOMH concentration and river discharge data to estimate riverine FDOMH export. The wetter El Niño dry season was followed by lower FDOMH export during the subsequent wet season. Furthermore, in the dry season after El Niño reached its strongest phase, a 90–187% increase in FDOMH export occurred. If widespread, this pattern suggests El Niño events may enhance export of FDOMH from south China rivers in dry seasons resulting in seasonal and annual shunting of the terrestrial DOM export, modulating coastal carbon cycling. This study highlights the need to incorporate climate-driven regulation patterns on DOM transport across the land-ocean interface. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Rivers; Tropics; Watersheds; Carbon cycling; Dissolved organic matters; High frequency HF; Jiulong River; Precipitation anomalies; Regulation pattern; River discharge; South China; Drought; carbon cycle; concentration (composition); dissolved organic matter; dry season; El Nino-Southern Oscillation; humic substance; precipitation (climatology); river discharge; subtropical region; China; Fujian; Jiulong Basin; Jiulong Estuary
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169683
作者单位	State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, China; Xiamen Environmental Monitoring Station, Xiamen, China; Dongshan Swire Marine Station, Xiamen University, Xiamen, China; Departments of Marine and Environmental Sciences, Civil and Environmental Engineering, and Chemistry and Chemical Biology, Northeastern University, Boston, MA, United States; Department of Land, Air and Water Resources, University of California, Davis, CA, United States
推荐引用方式 GB/T 7714	Qu L.,Wu Y.,Li Y.,et al. El Niño-Driven Dry Season Flushing Enhances Dissolved Organic Matter Export From a Subtropical Watershed[J],2020,47(19).
APA	Qu L..,Wu Y..,Li Y..,Stubbins A..,Dahlgren R.A..,...&Guo W..(2020).El Niño-Driven Dry Season Flushing Enhances Dissolved Organic Matter Export From a Subtropical Watershed.Geophysical Research Letters,47(19).
MLA	Qu L.,et al."El Niño-Driven Dry Season Flushing Enhances Dissolved Organic Matter Export From a Subtropical Watershed".Geophysical Research Letters 47.19(2020).