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Science 31 May 2002:
Vol. 296. no. 5573, pp. 1687 - 1689
DOI: 10.1126/science.1071828
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Reports
Climatic Control of the High-Latitude Vegetation Greening Trend and Pinatubo Effect
Wolfgang Lucht,1*
I. Colin Prentice,2
Ranga B. Myneni,3
Stephen Sitch,1
Pierre Friedlingstein,4
Wolfgang Cramer,1
Philippe Bousquet,4
Wolfgang Buermann,3
Benjamin Smith5
A biogeochemical model of vegetation using observed climate data
predicts the high northern latitude greening trend over the past two
decades observed by satellites and a marked setback in this trend after
the Mount Pinatubo volcano eruption in 1991. The observed trend toward
earlier spring budburst and increased maximum leaf area is produced by
the model as a consequence of biogeochemical vegetation responses
mainly to changes in temperature. The post-Pinatubo decline in
vegetation in 1992-1993 is apparent as the effect of temporary cooling
caused by the eruption. High-latitude CO2 uptake during
these years is predicted as a consequence of the differential response
of heterotrophic respiration and net primary production.
1 Potsdam Institute for Climate Impact
Research, Post Office Box 601203, D-14412 Potsdam, Germany.
2 Max Planck Institute for Biogeochemistry, Post
Office Box 100164, D-07745 Jena, Germany.
3 Department of Geography, Boston University,
Boston, MA 02215, USA.
4 Laboratoire des Sciences du
Climat et de'l Environment, F-91198 Gif-sur-Yvette Cedex, France.
5 Department of Physical Geography and Ecosystems
Analysis, Lund University, S-22362 Lund, Sweden.
*
To whom correspondence should be addressed. E-mail:
Wolfgang.Lucht{at}pik-potsdam.de
Read the Full Text
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