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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Biosphere/atmosphere interactions
  • Biogeosciences: Ecosystems, structure and dynamics
  • Biogeosciences: Climate dynamics
  • Atmospheric Processes: Boundary layer processes
  • Atmospheric Processes: Land/atmosphere interactions

Abstract

Boreal ecosystems sequestered more carbon in warmer years

Jing M. Chen

Department of Geography, University of Toronto, Canada

Baozhang Chen

Department of Geography, University of Toronto, Canada

Kaz Higuchi

Meteorological Service of Canada, Toronto, Canada

Jane Liu

Department of Physics, University of Toronto, Toronto, Canada

Douglas Chan

Meteorological Service of Canada, Toronto, Canada

Douglas Worthy

Meteorological Service of Canada, Toronto, Canada

Pieter Tans

CMDL/NOAA, Boulder, Colorado, USA

Andy Black

Department of Soil Science, University of British Columbia, Vancouver, Canada

A 13-year (1990–1996, 1999–2004), hourly air CO2 record measured on a 40 m tower in northern Canada is analyzed against interpolated marine boundary layer CO2 data representing the free troposphere above the tower. In warmer years, the planetary boundary layer was more depleted with CO2, suggesting that the land area (103–104 km2) upwind of the tower sequestered more carbon. After using a novel approach to derive the photosynthetic flux from the air CO2 diurnal variation pattern, it is confirmed that boreal ecosystem photosynthesis increased more than ecosystem respiration in warmer years.

Received 5 February 2005; accepted 13 April 2005; published 19 May 2006.

Citation: Chen, J. M., B. Chen, K. Higuchi, J. Liu, D. Chan, D. Worthy, P. Tans, and A. Black (2006), Boreal ecosystems sequestered more carbon in warmer years, Geophys. Res. Lett., 33, L10803, doi:10.1029/2006GL025919.

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