刘剑,李俊生,申茜,宋阳.昆明湖水体悬浮颗粒物与有色可溶性有机物光谱吸收特性研究[J].环境科学学报,2015,35(4):1089-1096
昆明湖水体悬浮颗粒物与有色可溶性有机物光谱吸收特性研究
- Spectral absorption features of suspended particulate and colored dissolved organic matter in Kunming Lake
- 基金项目：高分重大科技专项"环境保护遥感动态监测信息服务系统"(No.05-Y30B02-9001-13/15-5)
- 李俊生
- 中国科学院遥感与数字地球研究所, 数字地球重点实验室, 北京 100094
- 申茜
- 中国科学院遥感与数字地球研究所, 数字地球重点实验室, 北京 100094
- 宋阳
- University of Wisconsin, Wisconsin, USA
- 摘要：基于2011年9月23日在北京颐和园昆明湖测量的10个采样点的水体各组分吸收系数光谱,分析了秋季昆明湖悬浮颗粒物、非藻类颗粒物、藻类颗粒物及有色可溶性有机物(CDOM)的光谱吸收特性.结果表明,水体总吸收当中,藻类颗粒物贡献率最大,CDOM次之,非藻类颗粒物贡献率最低,这表明藻类颗粒物是秋季昆明湖水体中最主要的水体组分.秋季昆明湖南部藻类颗粒物吸收系数与叶绿素a浓度均大于北部,这可能是因为昆明湖水由北侧流入从南侧流出,且北京秋季盛行北风导致的.未发现CDOM与叶绿素a浓度间具有显著的相关关系,可能与藻类空间分布不均匀、并且受CDOM外源影响有关系.
- Abstract：Based on the data collected on September 23, 2011 at 10 sampling sites in Kunming Lake, Summer Palace, Beijing, the spectral absorption features of particulate matter, non-algal particulate matter, algal particulate matter and colored dissolved organic matter (CDOM) were analyzed. The results showed that: The descending order of contribution on the total water absorption spectra was: algal particulate matter, CDOM, and non-algal particulate matter, which indicated that the algal particulate matter was a major component in Kunming Lake during autumn season. The absorption coefficients of algal particulate matter in southern lake were higher than those in northern lake, which was probably caused by the water flow direction from north to south in the lake, or the wind direction from north to south in Beijing. No significant correlation was observed between CDOM and chlorophyll-a concentration. Possible reasons included non-uniform distribution of algal particulate matter and the CDOM influenced by some external sources.
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