pCO_2 distribution and CO_2 flux on the inner continental shelf of the East China Sea during summer 2011

IOCAS-IR

	pCO_2 distribution and CO_2 flux on the inner continental shelf of the East China Sea during summer 2011
	Qu BX(曲宝晓); Song JM(宋金明); Li XG(李学刚); Yuan HM(袁华茂); Li N(李宁); Ma QX(马清霞)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2013-09-15
出版年	2013
卷号	v.31 期号:05 页码:156-165
文献类型	CNKI期刊论文
摘要	Measurements of pH,total alkalinity(TA),partial pressure of CO2(pCO2) and air-sea CO2 flux(FCO2) were conducted for the inner continental shelf of the East China Sea(ECS) during August 2011.Variations in pCO2 distribution and FCO2 magnitude during the construction of the Three Gorges Dam(TGD)(2003-2009),and the potential effects of the TGD on the air-sea CO2 exchange were examined.Results showed that the ECS acts as an overall CO2 sink during summer,with pCO2 ranging from 107 to 585 μatm and an average FCO2 of-6.39 mmol/(m2·d).Low pCO2(<350 μatm) levels were observed at the central shelf(28°-32°N,123°-125.5°E) where most CO2-absorption occurred.High pCO2(>420 μatm) levels were found in the Changjiang estuary and Hangzhou Bay which acted as the main CO2 source.A negative relationship between pCO2 and salinity(R2=0.722 0) in the estuary zone indicated the predominant effect of the Changjiang Diluted Water(CDW) on the seawater CO2 system,whereas a positive relationship(R2=0.744 8) in the offshore zone revealed the influence of the Taiwan Current Warm Water(TCWW).Together with the historical data,our results indicated that the CO2 sink has shown a shift southwest while FCO2 exhibited dramatic fluctuation during the construction of the TGD,which is located in the middle reaches of the Changjiang.These variations probably reflect fluctuation in the Changjiang runoff,nutrient import,phytoplankton productivity,and sediment input,which are likely to have been caused by the operations of the TGD.Nevertheless,the potential influence of the TGD on the CO2 flux in the ECS is worthy of further study.
关键词	carbon dioxide exchange flux continental shelf East China Sea Three Gorges Dam
CNKI专辑号	A;B;
CNKI专辑名称	基础科学;工程科技Ⅰ辑;
CNKI专题号	B027;
CNKI专题名称	环境科学与资源利用;
分类号	X831
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Basic Research Program of China(973 Program)(No.2010CB951802) ; the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA05030402) ; the Natural Science Foundation of China for Creative Research Groups(No.41121064) ; the National Natural Science Foundation of China(No.40906056) ; the Public Science and Technology Research Funds Projects of Ocean(No.200905012-9)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/190737
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanography,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	Qu BX,Song JM,Li XG,et al. pCO_2 distribution and CO_2 flux on the inner continental shelf of the East China Sea during summer 2011. 2013.