冬季洱海水体叶绿素α丰度变化分析

Analysis of chlorophyll α abundance in winter boiling seawater

叶绿素α丰度的高低反映了水体营养物质的富集状况,是湖泊水质监测的一项重要指标,对湖泊生态环境变化具有重要的指示意义。本文选取对环境变化响应比较敏感的高原断陷湖泊——洱海为研究对象,采用遥感光谱信息增强的方法,分析1990-2016年间8个年份洱海冬季叶绿素α的丰度时空变化,并结合同期反演的湖面温度,探讨洱海水体叶绿素α丰度变化与湖面温度的相关性。研究发现,洱海水体叶绿素α丰度对温度比较敏感,低温区的水体叶绿素α丰度较低、高温区的水体叶绿素α丰度较高,二者成正相关。

The abundance of chlorophyll α refects the enrichment status of nutrients in water body. It is an important indicator of lake water quality monitoring and has important signifcance for the change of lake ecological environment. Taking the Bohai Sea as a research object, which is sensitive to environmental changes, we use remote sensing spectral information enhancement methods to analyze the temporal and spatial changes of chlorophyll abundance in Bohai Sea during the eight years from 1990 to 2016, and combine the same time inversion. The temperature of the lake surface was used to investigate the correlation between the change of chlorophyll abundance and the surface temperature of the lake. The study found that the abundance of chlorophyll α in Bohai Seawater was sensitive to temperature. The abundance of chlorophyll α in water was low in high-temperature area, and the abundance of chlorophyll α in water was high in high-temperature area. There was a positive correlation between them.