Biotic and abiotic controls on CO2 partial pressure and CO2 emission in the Tigris River, Turkey

doi:10.1016/j.chemgeo.2016.12.003

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 生态过程与重建研究中心

	Biotic and abiotic controls on CO2 partial pressure and CO2 emission in the Tigris River, Turkey
	Varol, Memet 1; Li, Siyue2
刊名	CHEMICAL GEOLOGY
	2017-01-20
卷号	449 页码:182-193
关键词	Riverine carbon flux CO2 degassing Partial pressure of CO2 (pCO(2)) Dissolved inorganic carbon Biotic and abiotic factors Tigris River
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2016.12.003
通讯作者	Varol, M (reprint author), Inonu Univ, Dept Basic Aquat Sci, Fac Fisheries, Malatya, Turkey.
英文摘要	Rivers act not only as vectors from the terrestrial biosphere to the ocean but also as significant sources of CO2 to the atmosphere, which plays a key role in the global carbon cycle. In this study, dissolved inorganic carbon (DIC) and carbon dioxide partial pressure (pCO(2)) in the Tigris River were investigated. The alkalinity concentrations of the Tigris River ranged from 1718 to 4995 mu q/L with an average of 3064 mu q/L (median: 2877 mu eq/L), 23 times the global median value of 1256 mu eq/L Higher alkalinity values occurred in autumn and winter months that were due to carbonate rock weathering, pCO(2) values varied from 95.6 to 16,001.8 mu atm with a total average of 1277 +/- 1883 mu atm. >80% of samples had pCO(2) above atmospheric equilibrium (390 mu atm). The highest levels of pCO(2) occurred at stations Diyarbakir, Bismil and Cizre, which are categorized as polluted stations. The lowest levels of pCO(2) generally occurred in the wet season (October-April) due to dilution effect of rainfall. The estimated water-to-air CO2 degassing flux from the Tigris River was around 39 mol/m(2)/y. Thus, 0.15 Tg C/y as CO2 released from the river to the atmosphere, about 0.6 fold the riverine DIC flux (0.25 Tg C/y). Correlative analyses demonstrated that population density and air temperature increased pCO(2), while slope degree decreased pCO(2). pCO(2) also had positive correlations with COD, NH4-N, PO4-P, SO4, Cl, phytoplankton abundance and number of phytoplankton taxa, while negative correlations with DO saturation and pH. (C) 2016 Elsevier B.V. All rights reserved.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000393001800015
内容类型	期刊论文
源URL	[http://172.16.51.4:88/handle/2HOD01W0/271]
专题	生态过程与重建研究中心
通讯作者	Varol, Memet
作者单位	1.Inonu Univ, Dept Basic Aquat Sci, Fac Fisheries, Malatya, Turkey 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Varol, Memet,Li, Siyue. Biotic and abiotic controls on CO2 partial pressure and CO2 emission in the Tigris River, Turkey[J]. CHEMICAL GEOLOGY,2017,449:182-193.
APA	Varol, Memet,&Li, Siyue.(2017).Biotic and abiotic controls on CO2 partial pressure and CO2 emission in the Tigris River, Turkey.CHEMICAL GEOLOGY,449,182-193.
MLA	Varol, Memet,et al."Biotic and abiotic controls on CO2 partial pressure and CO2 emission in the Tigris River, Turkey".CHEMICAL GEOLOGY 449(2017):182-193.