Historical warming reduced due to enhanced land carbon uptake

Elena Shevliakova, Ronald J. Stouffer, Sergey Malyshev, John P. Krasting, George C. Hurtt, Stephen Wilson Pacala

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Previous studies have demonstrated the importance of enhanced vegetation growth under future elevated atmospheric CO2 for 21st century climate warming. Surprisingly no study has completed an analogous assessment for the historical period, during which emissions of greenhouse gases increased rapidly and landuse changes (LUC) dramatically altered terrestrial carbon sources and sinks. Using the Geophysical Fluid Dynamics Laboratory comprehensive Earth System Model ESM2G and a reconstruction of the LUC, we estimate that enhanced vegetation growth has lowered the historical atmospheric CO2 concentration by 85 ppm, avoiding an additional 0.31 ± 0.06 °C warming. We demonstrate that without enhanced vegetation growth the total residual terrestrial carbon flux (i.e., the net land flux minus LUC flux) would be a source of 65-82 Gt of carbon (GtC) to atmosphere instead of the historical residual carbon sink of 186-192 GtC, a carbon saving of 251-274 GtC.

Original languageEnglish (US)
Pages (from-to)16730-16735
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number42
DOIs
StatePublished - Oct 15 2013

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • Carbon sink
  • Climate change
  • Earth system modeling

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