Chromophoric dissolved organic matter export from U.S. rivers

Geophysical Research Letters
By: , and 

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Abstract

Chromophoric dissolved organic matter (CDOM) fluxes and yields from 15 major U.S. rivers draining an assortment of terrestrial biomes are presented. A robust relationship between CDOM and dissolved organic carbon (DOC) loads is established (e.g., a350 versus DOC; r2 = 0.96, p < 0.001). Calculated CDOM yields are also correlated to watershed percent wetland (e.g. a350; r2 = 0.81, p < 0.001) providing a method for the estimation of CDOM export from ungauged watersheds. A large variation in CDOM yields was found across the rivers. The two rivers in the north-eastern U.S. (Androscoggin and Penobscot), the Edisto draining into the South Atlantic Bight, and some rivers draining into the Gulf of Mexico (Atchafalaya and Mobile) exhibit the highest CDOM yields, linked to extensive wetlands in these watersheds. If the Edisto CDOM yield is representative of other rivers draining into the South Atlantic Bight, this would result in a CDOM load equivalent to that of the Mississippi from a region of approximately 10% of the Mississippi watershed, indicating the importance of certain regions with respect to the role of terrigenous CDOM in ocean color budgets.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Chromophoric dissolved organic matter export from U.S. rivers
Series title Geophysical Research Letters
DOI 10.1002/grl.50357
Volume 40
Issue 8
Year Published 2013
Language English
Publisher AGU Publications
Contributing office(s) National Research Program - Central Branch
Description 5 p.
First page 1575
Last page 1579