Canopy temperature variability in a tropical rainforest, subtropical evergreen forest, and savanna forest in Southwest China
Canopy temperature variability in a tropical rainforest, subtropical evergreen forest, and savanna forest in Southwest China
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中国西南热带雨林、亚热带常绿森林和稀树草原森林冠层温度变化
DOI：
10.3832/ifor2223-010
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发表时间：
2017-06
期刊：
影响因子：
--
通讯作者：
Liu Yuntong
中科院分区：
文献类型：
--
作者：
Song Qinghai;Zhang Yiping;Sha Liqing;Deng Xiaobao;Deng Yun;Wu Chuansheng;Lu Zhiyun;Chen Aiguo;Zhang Shubin;Li Peiguang;Zhou Wenjun;Liu Yuntong
摘要：利用红外测温法测量冠层温度（Tc）已被广泛用于评估植物水分状况。在这里，我们评估了中国西南部原始热带雨林（TRF）、亚热带常绿阔叶林（STF）和山谷稀树草原森林（SAF）的Tc及其控制因素。我们发现 TRF 干季和湿季之间的 Tc 和气温 (Ta) 之间的差异高达 2.2 °C。然而，STF 干季和湿季的冠层与空气温差 (Tc-Ta) 仅 0.3 °C。太阳辐射（SR）是这三个地点干季和湿季 Tc-Ta 变化的主导因素。冠层叶子的加热增加可能是由于低气孔导度导致低蒸腾冷却的结果。 TRF 中 Tc-Ta 的变化对气孔关闭程度高度敏感。 Tc-Ta的变化受气候控制，但植物固有的性状，如气孔导度，也发挥了重要的控制作用。
Abstract: Canopy temperature (Tc) measurements with infrared thermometry have been widely used to assess plant water status. Here, we evaluated Tc and its controlling factors in a primary tropical rainforest (TRF), subtropical evergreen broad-leaved forest (STF) and valley savanna forest (SAF) in southwestern China. We found differences between Tc and air temperature (Ta) of as much as 2.2 °C between the dry and wet seasons in the TRF. However, the canopy-to-air temperature difference (Tc-Ta) was only 0.3 °C between the dry and wet seasons in the STF. Solar radiation (SR) was the dominant factor in Tc-Ta variations during the dry and wet seasons at the three sites. The increased heating in the canopy leaves was likely the result of low stomatal conductance leading to low transpiration cooling. Changes in Tc-Ta in the TRF were highly sensitive to the degree of stomatal closure. The change in Tc-Ta was controlled by the climate, but inherent plant traits, such as stomatal conductance, also played an important controlling role.
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干旱胁迫对季节性热带雨林自组织的影响
影响因子：
3.1
作者：
宋清海
通讯作者：
宋清海
DOI：
10.1017/cbo9780511845727.012
发表时间：
2013
期刊：
--
影响因子：
--
作者：
H. Jones
通讯作者：
H. Jones
影响因子：
5.2
作者：
C. Nevison;N. Mahowald;R. Weiss;R. Prinn
通讯作者：
C. Nevison;N. Mahowald;R. Weiss;R. Prinn
DOI：
10.1016/b978-0-408-04767-8.50021-9
发表时间：
1990
期刊：
--
影响因子：
--
作者：
G. Campbell;J. Norman;M. Steven;J. Clark
通讯作者：
G. Campbell;J. Norman;M. Steven;J. Clark
影响因子：
6.7
作者：
S. Jackson
通讯作者：
S. Jackson