Characteristics of wet dissolved carbon deposition in a semi-arid catchment at the Loess Plateau, China

doi:10.5194/bg-15-3345-2018

	Characteristics of wet dissolved carbon deposition in a semi-arid catchment at the Loess Plateau, China
	Xinhui, E (Xinhui, E.)1,3; Wang, LH (Wang, Linhua)1; Yen, H (Yen, Haw 2; Chen, LD (Chen, Liding)1,3; Wang, YF (Wang, Yafeng)1,3,4
刊名	BIOGEOSCIENCES
	2018-06-06
卷号	15 期号:11 页码:3345-3356
关键词	ORGANIC-CARBON ATMOSPHERIC DEPOSITION TIBETAN PLATEAU BULK DEPOSITION HUBBARD-BROOK COASTAL TOWN PRECIPITATION RAINWATER FLUX MATTER
ISSN号	1726-4170
DOI	10.5194/bg-15-3345-2018
英文摘要	Wet dissolved carbon deposition is a critical node of the global carbon cycle, but little is known about dissolved organic and inorganic carbon (DOC and DIC) concentrations and fluxes in the semi-arid areas of the Loess Plateau Region (LPR). In this study, we measured variations in DOC and DIC concentrations in rainfalls at Yangjuangou Ecological Restoration and Soil and Water Observatory. Rainwater samples were collected in 16 rainfall events from July to September and the event-based, monthly concentrations and fluxes of DOC and DIC were quantified. The results showed that the event-based concentrations and fluxes of DOC and DIC were highly variable, ranging from 0.56 to 28.71 mg CL-1 and from 3.47 to 17.49 mg CL-1, respectively. The corresponding event-based fluxes ranged from 0.21-258.36 mg Cm-2 and from 4.12 to 42.32 mg Cm-2. The monthly concentrations of DOC and DIC were 24.62 and 4.30 (July), 3.58 and 10.52 (August), and 1.01 and 5.89 (September) mg CL-1, respectively. Thus, the monthly deposition fluxes of DOC and DIC were 541.64/94.60, 131.03/385.03, and 44.44/259.16 mg Cm-2 for July, August, and September, respectively. In addition, the concentrations of DOC and DIC for the concentrated rainfall season (July-September) in the studied catchment were 7.06 and 7.00 mg CL-1, respectively. The estimated annual wet dissolved carbon depositions were 1.91 and 1.89 g Cm-2 yr(-1) for DOC and DIC, respectively. The results of this study suggest the variation in concentrations and fluxes of DOC and DIC and explore that these variation may be related to the dissolved carbon source and the rainfall characteristics during the concentrated rainfall season in the semi-arid catchment of the LPR. Furthermore, these results also suggest that dissolved carbon may be an important external input of carbon into terrestrial ecosystems.
WOS研究方向	Environmental Sciences & Ecology ; Geology
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000434354700001
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8632]
专题	青藏高原研究所_图书馆
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China; 2.Texas A&M Univ, Texas A&M Agrilife Res, Blackland Res & Extens Ctr, Temple, TX 76502 USA; 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
推荐引用方式 GB/T 7714	Xinhui, E ,Wang, LH ,Yen, H (Yen, Haw,et al. Characteristics of wet dissolved carbon deposition in a semi-arid catchment at the Loess Plateau, China[J]. BIOGEOSCIENCES,2018,15(11):3345-3356.
APA	Xinhui, E ,Wang, LH ,Yen, H ,Chen, LD ,&Wang, YF .(2018).Characteristics of wet dissolved carbon deposition in a semi-arid catchment at the Loess Plateau, China.BIOGEOSCIENCES,15(11),3345-3356.
MLA	Xinhui, E ,et al."Characteristics of wet dissolved carbon deposition in a semi-arid catchment at the Loess Plateau, China".BIOGEOSCIENCES 15.11(2018):3345-3356.