Recent Changes in Nitrogen Sources and Load Components to Estuaries of the Contiguous United States.

ABSTRACT: Regional Spatially Referenced Regressions on Watershed models were used to update 2002 delivered nitrogen (N) loads to estuaries of the contiguous US for 2011, supplemented by direct estuarine atmospheric deposition from the Community Multiscale Air Quality Model. Median 2011 watershed N yields were greatest for the Puget Trough, Virginian. and Oregon-Washington-Vancouver Coast marine ecoregions (MEs; 13. 7, 11.0, and 9.9 kg N/ha watershed/year, respectively); intermediate for the Floridian, Southern California Bight, and Northern California MEs (4.4-6.3 kg N/ha watershed/year); and lowest for the Northern Gulf of Mexico, Carolinian, and Gulf of Maine MEs (2.4-3.2 kg N/ha watershed/year). Dominant sources varied across marine ecoregions, with direct atmospheric deposition as the dominant s

SUBMITTER: Detenbeck NE 

PROVIDER: S-EPMC7751647 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature