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Detecting subsurface phytoplankton layer in Qiandao Lake using shipborne lidar

Authors :
Peng Chen
Delu Pan
Zhenhua Zhang
Zhihua Mao
Liu Hang
Source :
Optics express. 28(1)
Publication Year :
2020

Abstract

Qiandao Lake is located in the northern edge of subtropics, and its water body is thermally stratified in summer. It is of great scientific significance to study the vertical physical and chemical indexes and phytoplankton characteristics of the Qiandao Lake to reveal the aquatic ecosystem structure of the thermally stratified lake. Conventional observation uses in-situ profile instruments, which is time consuming and labor intensive. In recent years, lidar has shown increasing oceanic applications; however, it has not yet been extensively applied in inland water. There are no studies using lidar for detecting subsurface plankton layer in Qiandao Lake. In this study, we investigated the applicability of this technology for identifying subsurface plankton layer. A simple and fast phytoplankton layer detection method was introduced. The lidar-detected layer was found to well correspond with that of the in-situ measured subsurface chlorophyll maximum layer (SCML) and phycocyanin maximum layer. Primary results show that lidar and our detection method are effective for subsurface phytoplankton layer detection. They can serve as a good monitoring tool for studying inland water stratification.

Details

ISSN :
10944087
Volume :
28
Issue :
1
Database :
OpenAIRE
Journal :
Optics express
Accession number :
edsair.doi.dedup.....ee2e2b0154663733d676580c61d53d25