Accelerating net terrestrial carbon uptake during the warming hiatus due to reduced respiration

Ashley Ballantyne (), William Smith, William Anderegg, Pekka Kauppi, Jorge Sarmiento, Pieter Tans, Elena Shevliakova, Yude Pan, Benjamin Poulter, Alessandro Anav, Pierre Friedlingstein, Richard Houghton and Steven Running
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Ashley Ballantyne: University of Montana
William Smith: School of Natural Resources and the Environment, University of Arizona
William Anderegg: University of Utah
Pekka Kauppi: University of Helsinki
Jorge Sarmiento: Princeton University
Pieter Tans: NOAA ESRL
Elena Shevliakova: Geophysical Fluids Dynamics Laboratory
Yude Pan: US Department of Agriculture Forest Service
Benjamin Poulter: NASA Goddard Space Flight Center
Alessandro Anav: College of Engineering, Mathematics and Physical Sciences, University of Exeter
Pierre Friedlingstein: College of Engineering, Mathematics and Physical Sciences, University of Exeter
Richard Houghton: Woods Hole Research Center
Steven Running: University of Montana

Nature Climate Change, 2017, vol. 7, issue 2, 148-152

Abstract: Abstract The recent ‘warming hiatus’ presents an excellent opportunity to investigate climate sensitivity of carbon cycle processes. Here we combine satellite and atmospheric observations to show that the rate of net biome productivity (NBP) has significantly accelerated from −0.007 ± 0.065 PgC yr−2 over the warming period (1982 to 1998) to 0.119 ± 0.071 PgC yr−2 over the warming hiatus (1998–2012). This acceleration in NBP is not due to increased primary productivity, but rather reduced respiration that is correlated (r = 0.58; P = 0.0007) and sensitive (γ = 4.05 to 9.40 PgC yr−1 per °C) to land temperatures. Global land models do not fully capture this apparent reduced respiration over the warming hiatus; however, an empirical model including soil temperature and moisture observations better captures the reduced respiration.

Date: 2017
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DOI: 10.1038/nclimate3204

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