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WeiLong,ZhangFangqiu,GaoChangjun,CaiJian,YiXiaoqing
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Characteristics of radiation fluxes of casuarina coastal shelterbelt inZhanjiang, Guangdong province
Wei Long,Zhang Fangqiu,Gao Changjun,Cai Jian,Yi Xiaoqing
(Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization / Guangdong Academy of Forestry, Guangzhou,)
Abstract:
Casuarina shelterbelt is a typical forest eco- system in tropical and south subtropical coastal zone and island of China. Solar radiation is an important fac- tor for forest carbon sequestration and microclimate for- mation. Based on the radiation data of a typical Casuari- na equisetifolia shelter forest in Zhanjiang, Guangdong province, from January to December 2010, the radiation flux characteristics were analyzed. The results showed that: (1) Gross short-wave radiation (K↓) and Net radi- ation (R n ) in 2010 were 5 537.42 and 6 027.17 MJ·m - 2 , of which 62.72% and 61.73% in monsoon respectively. (2) The short-wave reflectivity of the ecosystem changes mainly within the range of 8% to 15% throughout the year. (3) Effective long-wave radiation (L n ) was negative throughout the year. It showed that the air temperature is higher than canopy surface temperature all the year round. This is helpful to the water vapor condensation on the plant surface. And it is a major water source of the coastal and island ecosystem.
Key words:  Coastal island · Casuarina · Chelterbelt · Radiation flux · Short-wave reflectivity

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