title: Coastal and inland water monitoring using a portable hyperspectral laser fluorometer.
abstract: The potential for a ship-mounted laser fluorometer to provide rapid, non-intrusively measurements in both coastal and lake conditions are investigated. The instrument consists of a high pulse repetition frequency (10-kHz) microchip laser for fluorescence excitation, a broadband hyperspectral micro spectrometer for spectral detection, and a confocal reflective fluorescent probe for signal collection; it weighs only about 1.7kg. Chlorophyll a (chl-a) and colored dissolved organic matter (CDOM) measured by the new instrument were observed to agree well with those measured by traditional time-consuming laboratory methods in Hangzhou Bay seawater and Qiandao Lake inland water. Subsequently, laser fluorescence distribution and characteristics of chl-a and CDOM in these regions were analyzed, which will improve our understanding of biogeochemical processes in these optically complex aquatic systems. The portable system is promising for water environment monitoring, especially in coastal and inland water.
authors.affiliation: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China. Electronic address: chenp@sio.org.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China.
authors.forename: Delu
authors.initials: D
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China.
authors.forename: Tianyu
authors.initials: T
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Mao
authors.affiliation: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China.
authors.forename: Yiwei
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002734:Chlorophyll / Q000032:analysis*; D000077194:Chlorophyll A; D004784:Environmental Monitoring; D060106:Lakes; D007834:Lasers; D008027:Light; D012767:Ships; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D014873:Water Pollutants; D002734:Chlorophyll; D000077194:Chlorophyll A
keywords: Chlorophyll a; Dissolved organic matter; Fluorescence spectroscopy; Hangzhou Bay; Lasers; Qiandao Lake