摘要
叶绿素α含量能够在一定程度上反映水质状况,利用遥感的方法监测叶绿素α具有众多优势.通过实测查干湖水体反射光谱和荧光峰特征,分析了2004年5到10月查干湖水的反射谱的荧光峰特征和水质变化的关系.结果表明:1.查干湖水体随着叶绿素α含量的增加,荧光峰位置基本上向长波方向移动,但是并不明显.2.荧光峰位置变化比较适合用于反演叶绿素α含量较高,且范围跨度较大的水体.3.查干湖水体荧光峰高度与叶绿素α具有稳定的响应关系,适合用于叶绿素α定量反演.4.荧光峰高度可以用于查干湖水体叶绿素α定量反演.这些结果为今后利用高光谱遥感技术在查干湖进行叶绿素α含量反演提供了研究和工作基础.
Chlorophyll-or （Chl-α） is a main parameter to determine the trophic state, which is one of the major factors affecting water environment and produces visible changes in the surface of waters. The fluorescence peak features of the reflectance spectrum of water in lake Chagan, Jilin province, and the relevant water quality constituents were studied from May to October in 2004. The peak height and peak position shift of the spectral reflectance were analyzed in detail. The resuits are as follows： 1. A shift of the peak position from about 690nm up to 710nm and an increase of the peak magnitude are observed when chlorophyll-et concentration increased. 2. The peak height has a steady correlation with Chl-α. 3. The peak position shift suits to inverse Chl-et with a higher concentration and a large scale water, but it does not suit to lake Chagan. 4. The peak height can be used in estimating Chl-α in lake Chagan. These results contribute significantly to increase the accuracy of the derivation of chlorophyll values from remote sensing data in lake Chagan.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期355-359,共5页
Journal of Infrared and Millimeter Waves
基金
中国科学院知识创新工程重要方向项目(KZCX3-SW-356)
国家自然科学基金(40401003
40371082)
中国科学院资源环境领域野外台站基金
中国科学院"东北之春"人才培养计划和中国科学院东北振兴科技行动计划重大项目资助
关键词
遥感
荧光峰
查干湖
叶绿素α
高光谱
remote sensing
fluorescence peak
lake Chagan
chlorophyll-α
hyperspectra
