南亚热带针阔混交林辐射通量特征 |
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| 出 版 社：北京林业大学学报 |
| 发表时间：2006 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：王旭，周国逸，孙阁，张德强，闫俊华，赵辉 |
| 点 击 率：17115 |
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| 关 键 字：南亚热带,针阔混交林,辐射通量 |
| 摘 要：该文分析了南亚热带针阔混交林各辐射分量：下行短波辐射(Rsb)、上行短波辐射(Rsc)、下行长波辐射(Rld)和上行长波辐射(Rlc)在不同时间尺度上的分布特征和相互关系．结果表明：在日尺度上，各辐射分量日总量的大小顺序为：RL (36．34 MJ／(m ·d))> R Ld(32．43 MJ／(m ·d))》R sd(12．46 MJ／(m ·d))> R s (0．98 MJ／(m ·d))，长波辐射的变异系数(CV)远小于短波辐射，而波长相同时上行辐射的CV小于下行辐射．除R 外，其余3种辐射的月均通量呈单峰形变化．R 与R 在不同季节的日变化均呈规则的单峰曲线，而R 和R 的日均变化则大致呈波浪形．全年系统辐射支出中R 为80．7％ ，R 仅占2．2％ ，R 在辐射平衡中的作用远超过以往强调最多的R 日尺度上，2003年反射率的平均值为8．3％ ．在不同时间尺度上影响目的主要因素是不同的．与旱季相比，雨季两种长波辐射的相关性高，数值也更接近．在较大时间尺度(1个月)上，净辐射(R )与R 相关性最好，而在较小的时间尺度(≤1 d)上，R 与R 相关性最好，故在考察辐射通量间相互关系时，应充分注意尺度效应的影响． |
| 关 键 字(英文)：low subtropical China,coniferous and broadleaved mixed forest,radiation flux |
| 摘 要(英文)：The distribution characteristics and relationship of radiation flux，including downwelling shortwave radiation(Rsd)，upwelling shortwave radiation(Rs )，downwelling longwm e radiation(RI )and upwelling
longwave radiation(RL )of coniferous and broadleaved mixed forests in low subtropical China，were analyzed．The major results were as followings：the average daily radiation flux was Rls(36.34 MJ／(m2·d))> R1d(32.43 MJ／(m2·d))》R (12.46 MJ／(m2·d))> R (0.98 MJ／(m2·d))．The variation coefficient(C') of long wave radiation flux was obviously less than that of shortwave radiation flux．When the waves of radiation were the same。the CV of upwelling was less than that of the downwelling．All of the monthly gross radiation flux fluctuated in single apex in a)'ear，except RI j．The average diurnal processes of R and R s presented peak type curves，however the processes of R l and R l presented wave CUP,／es．In the output of radiation flux in 2003，RI¨ was the largest(80．7％)and the percentage of R、l】was on1)r 2．2％ ．These indicated that RI
was more intportant than R ， ， which was considered as the ／／lost important part of output radiation．The average daily sh0rt radiation reflected that coeficient( )was 8．3％ ．The dominant factors of in diferent temporal scales were varied．In longer temporal—scales as monthly，there existed good correlation between R
and RL ，while there existed good corelation between R and R sd in short temporal—scales(≤1 d)．It seemed that the shorter the temporal—scale was，the better the corelation was．It indicates that it is very important to emphasize the temporal—scale when researching the relationship of the radiation flux． |
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 南亚热带针阔混交林辐射通量特征_2006 北京林业大学学报 王旭.pdf |
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