Carbon dynamics and community production in the Mississippi River plume

CORC > 厦门大学 > 海洋环境－已发表论文

	Carbon dynamics and community production in the Mississippi River plume
	Guo, Xianghui ; Cai, Wei-Jun ; Huang, Wei-Jen ; Wang, Yongchen ; Chen, Feizhou ; Murrell, Michael C. ; Lohrenz, Steven E. ; Jiang, Li-Qing ; Dai, Minhan ; Hartmann, Justin ; Lin, Qi ; Culp, Randy ; Dai MH(戴民汉)
刊名	http://dx.doi.org/10.4319/lo.2012.57.1.0001
	2012-01
关键词	GULF-OF-MEXICO LOUISIANA CONTINENTAL-SHELF PARTICULATE ORGANIC-CARBON EAST CHINA SEA OCEAN ACIDIFICATION BIOLOGICAL UPTAKE ATLANTIC-OCEAN ZAIRE ESTUARY WATER CO2
英文摘要	National Aeronautics and Space Administration (NASA) [NNS04AB84H, NNG05GD22G]; National Science Foundation (NSF) Division of Ocean Sciences [(OCE)-0752110, OCE-0752254]; NASA [NNX10AU06G]; Natural Science Foundation of China (NSFC) [40928006]; Dissolved inorganic carbon (DIC), total alkalinity (TAlk), pH, and dissolved oxygen (DO) were determined in the Mississippi River plume during five cruises conducted in the spring, summer, and fall. In contrast to many other large rivers, both DIC and TAlk were higher in river water than in seawater. Substantial losses of DIC, relative to TAlk, occurred within the plume, particularly at intermediate salinities. DIC removal was accompanied by high DO, high pH, and nutrient depletion, and was attributed to high phytoplankton production. As a result, the carbonate saturation in the plume became much higher than in ocean and river waters. A mixing model was used to determine DIC removal. We provide evidence that the use of a two-end-member (river and ocean) mixing model was valid during late summer and fall (low discharge period). However, for other periods we used salinity and TAlk to delineate a mixing model that included two river end members and an ocean end member. Net community production rates in the plume, estimated using a box model, peaked in the summer and were among the highest reported to date for large river plumes. In the summer and fall, biological production in the river plume consumed a majority of the available nutrients, whereas during the spring only a small fraction of the available nutrients were consumed in the plume. Biological production was the dominant process influencing pH and carbonate saturation state along the river-ocean gradient, whereas physicochemical dynamics of mixing played an important role in controlling the TAlk and DIC distributions of this large river plume.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/60253]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Guo, Xianghui,Cai, Wei-Jun,Huang, Wei-Jen,et al. Carbon dynamics and community production in the Mississippi River plume[J]. http://dx.doi.org/10.4319/lo.2012.57.1.0001,2012.
APA	Guo, Xianghui.,Cai, Wei-Jun.,Huang, Wei-Jen.,Wang, Yongchen.,Chen, Feizhou.,...&戴民汉.(2012).Carbon dynamics and community production in the Mississippi River plume.http://dx.doi.org/10.4319/lo.2012.57.1.0001.
MLA	Guo, Xianghui,et al."Carbon dynamics and community production in the Mississippi River plume".http://dx.doi.org/10.4319/lo.2012.57.1.0001 (2012).