第35卷，第11期 2015年11月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol. 35 ,No. 11 -pp3247-3254
November, 2015
High-FrequencyObservation of WaterSpectrumand Its ApplicationinMonitoring of DynamicVariationof
Suspended Materials in the Hangzhou Bay
DAI Qian'-2, PAN De-lu' , HE Xian-qiang'", ZHU Qian-kun',
GONGFang'，HUANGHai-qing
1. State Key Laboratory of Satellite Ocean Environment Dynamics , The Second Institute of Oceanography State Oceanic Administration, Hangzhou310012, China
2. Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhejiang Province ,
Marine Fishery Institute of Zhejiang Province , Zhoushan316004 , China
Abstract In situ measurement of water spectrum is the basis of the validation of the ocean color remote sens ing . The traditional method to obtain the water spectrum is based on the shipboard measurement at limited sta tions , which is difficult to meet the requirement of validation of ocean color remote sensing in the highly dy namic coastal waters . To overcome this shortage, continuously observing systems of water spectrum have been developed in the world. However , so far , there are still few high-frequency observation systems of the water spectrum in coastal waters , especially in the highly turbid and high-dynamic waters . Here , we established a high-frequency water-spectrum observing system based on tower in the Hangzhou Bay . The system measures the water spectrum at a step of 3 minutes , which can fully match the satellite observation . In this paper , we primarily developed a data processing method for the tower-based high-frequency water spectrum data , to real ize automatic judgment of clear sky , sun glint , platform shadow , and weak illumination , etc . + and verified the processing results , The results show that the normalized water-leaving radiance spectra obtained through tower observation have relatively high consistency with the shipboard measurement results , with correlation coeffi-cient of more than O .99 , and average relative error of 9. 96% . In addition , the long-term observation capability of the tower-based high-frequency water-spectrum ohserving system was evaluated , and the results show thal although the system has run for one year , the normalized water-leaving radiance obtained by this system have good consistency with the synchronously measurement by Portable spectrometer ASD in respect of spectral shape and value , with correlation coefficient of more than O .90 and average relative error of 6, 48% . Moreo-ver, the water spectra from high-frequency observation by the system can be used to effectively monitor the rapid dynamic variation in concentration of suspended materials with tide . The tow er-based high-frequency wa ter-spectrum observing system provided rich in situ spectral data for the validation of ocean color remote sens ing in turbid waters , especially for validation of the high temporal-resolution geostationary satellite ocean color remote sensing .
KeywordsWater spectrum ; High-frequency observation ; Ocean color remote sensing : Validation ; Suspended material ; Tide
中图分类号：P714.3
文献标识码；A
Received : 2014-07-14 ; accepted : 2014-11-20
D0I:10.3964/i.issn.1000-0593(2015)11-3247-08
Foundation item: National High Technology and Development Program of China(2014 A A123301), Global Change and Air-Sea Interaction Pro-
ject of China(G ASI-03-03-01-01)
Biography : DAI Qian , (1989), Master degree of Marine Fishery Institute of Zhejiang Province
Corresponding author
e-mail : hexianqiang@ sio -org -cn
e-mail : huoyingcomer@ 163 -com