Series Lines on Change of Leaf Temperature Difference of Quercus variabilis with Solar Radiation and Wind Speed

doi:10.3969/j.issn.1000-6362.2016.02.011

Abstract

Abstract:

In order to explore the effect of solar radiation, air temperature and wind speed on leaf temperature (LT) of Quercus variabilis, and to determine the consistency of LT and the series lines of Gates climate space, LT and air temperature (Ta) and solar radiation (R) were measured in clear day with the conditions of controlled wind speeds. The relationship between leaf air temperature difference (LATD) and solar radiation at different wind speeds was studied. The series lines of climate space of Quercus variabilis were determined by using Gates theory climate space and graphic method. The results showed LATD of Quercus seedlings increased linearly with the radiation increasing. Canopy temperature depression (CTD) of Quercus variabilis also increased with radiation increasing, but affected by the wind speed. CTD tended to be zero when wind speed was 0.8m·s^-1. CTD of Quercus seedlings changed as R linearly with the radiation increasing and different wind speeds. The linear relationship was series lines and decreased with wind speed increasing. The series lines were in accordance with the upper limits of Gates theory climate space. The upper limit of climate space could be expressed by adding up biological maximum temperature (BMT) and CTD value on series lines with different wind speeds.

Key words: Quercus variabilis, CTD, Solar radiation, Wind speed, Climate space, Series lines

WANG Pei-shu, WANG Wei-hong, CHEN Jing-ling, WANG Qian, LI Guo-huai. Series Lines on Change of Leaf Temperature Difference of Quercus variabilis with Solar Radiation and Wind Speed[J]. Chinese Journal of Agrometeorology, 2016, 37(02): 213-221.

References

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