[1]陈景玲,张冬,王谦*,等. 荆条孤立冠层天空开度与太阳辐射透射率关系研究[J].西北林学院学报,2014,29(05):19-25.[doi:doi:10.3969/j.issn.1001-7461.2014.05.04]
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 荆条孤立冠层天空开度与太阳辐射透射率关系研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年05期
页码:
19-25
栏目:
出版日期:
2014-09-30

文章信息/Info

Title:
 Solar Radiation Transmittance of Isolated Vervain Family Canopy Using Canopy Analyzer
文章编号:
1001-7461(2014)05-0019-07
作者:
 陈景玲; 张冬; 王谦*; 吴明作; 赵勇
 （河南农业大学，河南 郑州 450002）
Author(s):
 CHEN Jing-ling;  ZHANG Dong;  WANG Qian*;  WU Ming-zuo;  ZHAO Yong
 (Henan Agricultural University, Zhengzhou, Henan 450002, China)
关键词:
 ; 荆条灌丛; 孤立冠层; DIFN; 太阳辐射; 透射率
Keywords:
 ; vervain family;  isolated canopy;  DIFN;  solar radiation;  transmittance rate
分类号:
S718.45
DOI:
doi:10.3969/j.issn.1001-7461.2014.05.04
文献标志码:
A
摘要:
 为寻求用植物冠层分析仪（PCA）确定荆条灌丛孤立冠层太阳辐射的透射率，分别选择阴天和晴天条件，实测荆条灌丛下和裸地对照的太阳总辐射和散射辐射，以确定冠层的总辐射、散射辐射、直接辐射透射率。同时对荆条灌丛孤立冠层进行冠层分析，确定全部冠层的天空开度DIFN总，以及-80°~+80°不同方位角方向的天空开度DIFN总。以便对比分析冠层分析的天空开度与实测太阳辐射透射率的关系。结果表明，散射辐射透射率与冠层开度DIFN总相关极为显著，相关系数接近于1；用DIFN总计算的冠层下散射辐射比实测值低估了36.8%；太阳直接辐射所在方位的PCA冠层分析的DIFN直与冠层下直接辐射的透过率关系密切，在-80°~+80°方位角范围内都呈抛物线型变化，-80°~0°范围内关系极为密切，而20°~+80°范围内DIFN直偏低。PCA冠层分析确定的冠层天空开度DIFN总可以用来确定冠层下的散射辐射；不同方位角的天空开度DIFN直可以表达冠层下的太阳直接辐射透射率，这对解决冠层下太阳直接辐射无法测定的问题很有意义。
Abstract:
 For the purpose of searching for the route of determining the solar radiation transmittance rate through canopy analyzing by using plant canopy analyzer, PCA, the paper measured the total solar radiation and scattering radiation under vervain family canopy and over bare land under overcast and clear weather to determine the transmittance rates of total solar radiation, scattering solar radiation and direct solar radiation. At the same time the paper analyzed the vervain family canopy to determine diffusion non-interceptance (DIFN), divided as DIFNtotal and DIFNdirect at -80°~+80°different solar radiation directions to analyze the relation between DIFN derived from canopy analyzing and solar radiation transmittance rates actually measured. The results showed that the transmittance rate of diffusion light had close relation with DIFNtotal, the correlation coefficient almost equal to 1. The diffusion light intensity calculated by DIFNtotal was 36.8% underestimated compared with those actually measured. There were close relations between the DIFNdirect at solar direct radiation direction analyzed by PCA and direct solar radiation transmittance rate, all of them changed according to parabolic curve at -80°~+80°azimuth angle. At -80°~0°azimuth angle, the DIFNdirect was almost the same to the direct solar radiation transmittance rate, and at 20°~+80°azimuth angle, DIFNdirect  was lower. It was concluded that DIFNtotal measured by PCA could be used to determine diffusion radiation under vervain family canopy. DIFNdirect of different azimuth angles could be used to express direct solar radiation transmittance rate. This is meaningful to solve the problem that the direct solar radiation under plant canopy can not be measured by instrument.

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备注/Memo

备注/Memo:
 收稿日期：2013-11-05修回日期：2013-11-24
基金项目：国家自然科学基金“基于气候空间上限列线的栓皮栎幼苗高温叠加干旱胁迫机制研究”（31370621）；国家自然科学基金“番茄叶片低温胁迫气象指标的气候空间列线研究”（31071321）。
作者简介：陈景玲，女，副教授，研究方向：植物生态。E-mail: chenjingling5@163.com
*通信作者：王谦，男，副教授，博士，研究方向：植物生态。E-mail: wangqianhau@163.com
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