Organic carbon burial in lakes and reservoirs of the conterminous United States

Environmental Science & Technology
By: , and 

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Abstract

Organic carbon (OC) burial in lacustrine sediments represents an important sink in the global carbon cycle; however, large-scale OC burial rates are poorly constrained, primarily because of the sparseness of available data sets. Here we present an analysis of OC burial rates in water bodies of the conterminous U.S. (CONUS) that takes advantage of recently developed national-scale data sets on reservoir sedimentation rates, sediment OC concentrations, lake OC burial rates, and water body distributions. We relate these data to basin characteristics and land use in a geostatistical analysis to develop an empirical model of OC burial in water bodies of the CONUS. Our results indicate that CONUS water bodies sequester 20.8 (95% CI: 9.4–65.8) Tg C yr–1, and spatial patterns in OC burial are strongly influenced by water body type, size, and abundance; land use; and soil and vegetation characteristics in surrounding areas. Carbon burial is greatest in the central and southeastern regions of the CONUS, where cultivation and an abundance of small water bodies enhance accumulation of sediment and OC in aquatic environments.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Organic carbon burial in lakes and reservoirs of the conterminous United States
Series title Environmental Science & Technology
DOI 10.1021/acs.est.5b00373
Volume 49
Issue 13
Year Published 2015
Language English
Publisher American Chemical Society
Publisher location Easton, PA
Contributing office(s) Colorado Water Science Center, Toxic Substances Hydrology Program, National Research Program - Central Branch
Description 9 p.
First page 7614
Last page 7622
Country United States
Online Only (Y/N) N
Additional Online Files (Y/N) N
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