Actions for CARBON FLUXES IN A MANAGED PINE FOREST UNDER AMBIENT AND ELEVATED CO{sub 2} [electronic resource].

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CARBON FLUXES IN A MANAGED PINE FOREST UNDER AMBIENT AND ELEVATED CO{sub 2} [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
4 pages : digital, PDF file
Additional Creators
Brookhaven National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The primary objective of this study is to estimate CO₂ fluxes (F{sub CO₂}) under ambient and elevated atmospheric CO₂, and varying environmental conditions. Additional objectives are to: (2) quantify canopy conductance and evaluate the hypothesis that canopy conductance will not be altered by elevated atmospheric CO₂ because reduction in leaf conductance is compensated by increased leaf area index, and (3) quantify the effect of elevated CO₂ on aboveground production and apparent allocation of carbon below ground. In order to achieve the primary objective, the authors propose a modification to a methodology proposed earlier which emphasized leaf level measurements. These modifications stem from analysis of measurements performed in 1995--1996 that demonstrate (i) high variability in CO₂ assimilation (A)--internal concentration (C{sub i} relations A-C{sub i} curves) in each level in the canopy for given photosynthetically active radiation (PAR) and soil moisture content (θ) conditions, (ii) the relative independence of the ratio of C{sub i} to atmospheric CO₂ concentration (C{sub i}/C{sub a}) from C{sub a} (different levels within canopy for a wide range of moisture content conditions), (iii) similarity in CO₂ and water vapor flux co-spectra which permits estimation of CO₂ conductances from water vapor conductances for canopy trees, and (iv) the good correlation (r=0.94) between scaled 15-tree stem flux measurements and eddy correlation water vapor flux on a daily time step.
Report Numbers
E 1.99:bnl--66095
E 1.99: kp120202
kp120202
bnl--66095
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Note
Published through SciTech Connect.
11/09/1998.
"bnl--66095"
" kp120202"
"KP120202"
HSIEH,C.I.; SCHAFER,K.; OREN,R.; KATUL,G.
Funding Information
AC02-98CH10886
AS423EBID
View MARC record | catkey: 13802572