Contribution of Semi-Arid Forests to the Climate System
Top Cited Papers
- 22 January 2010
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 327 (5964), 451-454
- https://doi.org/10.1126/science.1179998
Abstract
The Long and Short of It: Semi-arid forests cover close to 18% of Earth's land surface. If climate change were to stimulate carbon accumulation in these areas, resulting changes in the forests could both promote climate cooling and warming: On one hand, forest growth would draw CO 2 from the atmosphere, providing a cooling effect on climate; on the other, as forests grew and became more dense, their albedo would decrease, which would warm climate. Rotenberg and Yakir (p. 451 ; see the Perspective by Schimel ) now report that a shift in peak photosynthetic activities from summer to early spring would, indeed, cause carbon accumulation by the forests, but that a suppression of reflected longwave radiation effect would complement the better-known (shortwave) albedo effect, doubling the amount of potential warming. Several decades of carbon accumulation would thus be necessary to counteract these radiative changes.Keywords
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