Asymmetric Day/Night Tght Temperature Elevation: Growth lmplications for Yellow-Poplar and Loblolly Pine Using Simulation Modeling

摘要

Using the TREGRO simulation model we examined the relative impact of asymmetric and symmetric elevations of dayight temperatures on 3 yr biomass gain of yellow-poplar (Liriodendron tulipifera L.) and loblolly pine (Pinus taeda L.). Temperature elevation scenarios used were: (1) an asymmetric 0.3 deg C/0.9 deg C increase in dayight temperature (T + 0.3/0.9) as observed since the turn of the century; (2) a symmetric 4 deg C elevation during both day and night periods (T + 4) as predicted by general circulation models; and (3) an asymmetric 2 deg C elevation of dayight temperature (T + 2/6).