Contrasting Temperature and Precipitation Patterns of Trees in Different Seasons and Responses of Infrared Canopy Temperature in Two Asian Subtropical Forests

doi:10.3390/f10100902

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 生态系统研究网络观测与模拟重点实验室 > CERN水分分中心

	Contrasting Temperature and Precipitation Patterns of Trees in Different Seasons and Responses of Infrared Canopy Temperature in Two Asian Subtropical Forests
	Chen, Zhi 1,3; Yu, Guirui 1,3; Yan, Junhua 2; Wang, Huimin 1,3
刊名	FORESTS
	2019-10-01
卷号	10 期号:10 页码:14
关键词	canopy temperature seasonal variation temperature and precipitation asynchronous environmental sensitivity seasonal drought
DOI	10.3390/f10100902
通讯作者	Chen, Zhi(chenz@igsnrr.ac.cn)
英文摘要	Canopy temperature (Tc), one of the most important plant ecophysiological parameters, has been known to respond rapidly to environmental change. However, how environmental factors-especially the temperature and precipitation pattern-impact Tc has been less discussed for forest stands. In this study, we investigated seasonal variations and responses of the Tc and canopy-to-air temperature difference (Delta T) associated with environmental conditions in two subtropical forests with contrasting temperature and precipitation patterns-Dinghushan (DHS) (temperature and precipitation synchronous site: hot and wet in the summer) and Qianyanzhou (QYZ) (temperature and precipitation asynchronous site: hot and arid in the summer). The results showed that Tc exhibits clear diurnal and seasonal variations above air temperature throughout the day and year, suggesting that the canopy of both DHS and QYZ is typically warmer than ambient air. However, the canopy-warming effect was substantially intensified in QYZ, and the difference of Delta T between dry and wet seasons was small (-0.07 degrees C) in DHS, while it was up to 0.9 degrees C in QYZ. Regression analysis revealed that this resulted from the combined effects of the increased solar radiation and vapor pressure deficit (VPD), but reduced canopy conductance (g(c)) caused by drought in the summer in QYZ. Sensitivity analysis further indicated that the responses of Delta T to VPD and g(c) changes were quite divergent, presenting negative responses to the enhanced VPD and g(c) in QYZ, while there were positive responses in DHS. The high productivity coupled with low transpiration cooling that occurs in a temperature and precipitation synchronous condition mainly contributes to the positive responses of Delta T in DHS. This study reveals the seasonal variations, environmental responses, and underlying causes of Tc under different temperature and precipitation patterns, providing useful information for the regional assessment of plant responses to future climate change.
资助项目	National Key Research and Development Program of China[2016YFA0600103] ; National Key Research and Development Program of China[2016YFA0600104] ; National Natural Science Foundation of China[31600347] ; National Natural Science Foundation of China[41671045] ; National Natural Science Foundation of China[41501381] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19020302]
WOS关键词	CONIFEROUS PLANTATION ; STOMATAL CONDUCTANCE ; CARBON-DIOXIDE ; USE EFFICIENCY ; ECOSYSTEMS ; DROUGHT ; TRANSPIRATION ; VARIABILITY ; VEGETATION ; EXCHANGE
WOS研究方向	Forestry
语种	英语
出版者	MDPI
WOS记录号	WOS:000498395600079
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130310]
专题	地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心
通讯作者	Chen, Zhi
作者单位	1.Chinese Acad Sci, Synth Res Ctr, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling,Chine, Beijing 100101, Peoples R China 2.Chinese Acad Sci, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zhi,Yu, Guirui,Yan, Junhua,et al. Contrasting Temperature and Precipitation Patterns of Trees in Different Seasons and Responses of Infrared Canopy Temperature in Two Asian Subtropical Forests[J]. FORESTS,2019,10(10):14.
APA	Chen, Zhi,Yu, Guirui,Yan, Junhua,&Wang, Huimin.(2019).Contrasting Temperature and Precipitation Patterns of Trees in Different Seasons and Responses of Infrared Canopy Temperature in Two Asian Subtropical Forests.FORESTS,10(10),14.
MLA	Chen, Zhi,et al."Contrasting Temperature and Precipitation Patterns of Trees in Different Seasons and Responses of Infrared Canopy Temperature in Two Asian Subtropical Forests".FORESTS 10.10(2019):14.