Assessing the impact of changes in climate and CO2 on potential carbon sequestration in agricultural soils

Atul K. Jain, Tristram O. West, Xiaojuan Yang, Wilfred M. Post

Research output: Contribution to journalArticlepeer-review

Abstract

Changes in soil management can potentially increase the accumulation of soil organic carbon (SOC), thereby sequestering CO2 from the atmosphere. However, the amount of carbon sequestered in soils can be augmented or lessened due to changes in climate and atmospheric CO2 concentration. The purpose of this paper is to study the influence of climate and CO2 feedbacks on soil carbon sequestration using a terrestrial carbon cycle model. Model simulations consist of observed adoption rates of no-tillage practices on croplands in the U.S. and Canada between 1981 - 2000. Model results indicate potential sequestration rates between 0.4-0.6 MgC/ha/yr in the Midwestern U.S. with decreasing rates towards the western, dryer regions of the U.S. It is estimated here that changes in climate and CO2 between 1981 - 2000 could be responsible for an additional soil carbon sequestration of 42 Tg. This is 5% of the soil carbon estimated to be potentially sequestered as the result of conversion to no-tillage in the U.S. and Canada.

Original languageEnglish (US)
Article numberL19711
Pages (from-to)1-4
Number of pages4
JournalGeophysical Research Letters
Volume32
Issue number19
DOIs
StatePublished - Oct 16 2005

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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