Spatial patterns and environmental controls of particulate organic carbon in surface waters in the conterminous United States.
Qichun Yang, Xuesong Zhang, Xingya Xu, Ghassem R Asrar, Richard A Smith, Jhih-Shyang Shih, Shuiwang Duan
The Science of The Total Environment | Published : 2016
Carbon cycling in inland waters has been identified as an important, but poorly constrained component of the global carbon cycle. In this study, we compile and analyze particulate organic carbon (POC) concentration data from 1145 U.S. Geological Survey (USGS) gauge stations to investigate the spatial variability and environmental controls of POC concentration. We observe substantial spatial variability in POC concentration (1.43 ± 2.56 mg C/L, mean ± one standard deviation), with the Upper Mississippi River basin and the Piedmont region in the eastern U.S. having the highest POC concentration. Further, we employ generalized linear models (GLMs) to analyze the impacts of sediment transport an..View full abstract