| A field investigation in Lake Dianchi was carried out in November, 2009, and a dataset including absorption coefficients and concentration of water components was collected. Absorption properties and its spatial distribution of Lake Dianchi have been systematically analyzed, the results show that: ① Absorption spectral curve of total particles (ap) are similar with that of phytoplankton(aph), which indicates that phytoplankton absorption dominates absorption of total suspended particles; ②Significant relationships are found between aph(440),aph(624) ,aph(675) and concentration of chla, and cyanophyta dominats the quantity of the algae in water columns; ③There are more phytoplankton existed in northern lake than other areas because of higher level of eutrophication. Comparing with other water columns, discrepancies mainly appear as below: ①The mean value of slope of absorption spectral curve of non-algal particles (Sd) in Lake Dianchi is much bigger than that in other case-Ⅱ waters; ② The mean value of slope of absorption spectral curve of chromophoric dissolved organic matter(CDOM) Sg in Lake Dianchi is much smaller than that in other case-Ⅱ waters; ③ Specific absorption of phytoplankton (a*ph) at 440 nm and 675 nm is at intermediate level, and a*ph value is susceptible to different regions, seasons, population structure of phytoplankton and so on. |
