A systematic examination of the relationships between CDOM and DOC in inland waters in China

	A systematic examination of the relationships between CDOM and DOC in inland waters in China
	K. S. Song, Y. Zhao, Z. D. Wen, C. Fang and Y. X. Shang
刊名	Hydrology and Earth System Sciences
	2017
卷号	21 期号:10 页码:5127-5141
通讯作者	宋开山
中文摘要	Chromophoric dissolved organic matter (CDOM) plays a vital role in the biogeochemical cycle in aquatic ecosystems. The relationship between CDOM and dissolved organic carbon (DOC) has been investigated, and this significant relationship lays the foundation for the estimation of DOC using remotely sensed imagery data. The current study examined samples from freshwater lakes, saline lakes, rivers and streams, urban water bodies, and ice-covered lakes in China for tracking the variation of the relationships between DOC and CDOM. The regression model slopes for DOC vs. a CDOM (275) ranged from extremely low 0.33 (highly saline lakes) to 1.03 (urban waters) and 3.01 (river waters). The low values were observed in saline lake waters and waters from semi-arid or arid regions, where strong photobleaching is expected due to less cloud cover, longer water residence time, and daylight hours. In contrast, high values were found in waters developed in wetlands or forest in Northeast China, where more organic matter was transported from catchment to waters. The study also demonstrated that closer relationships between CDOM and DOC were revealed when a CDOM (275) were sorted by the ratio of a CDOM. 250/ aCDOM (365), which is a measure for the CDOM absorption with respect to its composition, and the determination of coefficient of the regression models ranged from 0.79 to 0.98 for different groups of waters. Our results indicate the relationships between CDOM and DOC are variable for different inland waters; thus, models for DOC estimation through linking with CDOM absorption need to be tailored according to water types.
WOS记录号	WOS:000412743600002
内容类型	期刊论文
源URL	[http://ir.iga.ac.cn/handle/131322/7562]
专题	东北地理与农业生态研究所_湿地与全球变化学科组_期刊论文
推荐引用方式 GB/T 7714	K. S. Song, Y. Zhao, Z. D. Wen, C. Fang and Y. X. Shang. A systematic examination of the relationships between CDOM and DOC in inland waters in China[J]. Hydrology and Earth System Sciences,2017,21(10):5127-5141.
APA	K. S. Song, Y. Zhao, Z. D. Wen, C. Fang and Y. X. Shang.(2017).A systematic examination of the relationships between CDOM and DOC in inland waters in China.Hydrology and Earth System Sciences,21(10),5127-5141.
MLA	K. S. Song, Y. Zhao, Z. D. Wen, C. Fang and Y. X. Shang."A systematic examination of the relationships between CDOM and DOC in inland waters in China".Hydrology and Earth System Sciences 21.10(2017):5127-5141.