双波长水体颗粒体散射函数测量仪研制与测量

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中图分类号：P714 文献标志码：A 文章编号：1002-4026（2025）06-0001-09

开放科学（资源服务）标志码（OSID）

Development of a dual-wavelength instrument for measuring the volume

scattering function of aquatic particles

TAO Bangyi'， HAN Chang1，²，LI Yunzhou³ * ，PAN Yaorui1，4，LI Changpeng1，4，MAO Zhihua1，2

（1.State Key Laboratory of Satelite Ocean Environment Dynamics，Second Institute of Oceanography，Ministry of Natural Resources， Hangzhou 3100l2， China;2. School of Oceanography， Shanghai Jiao Tong University， Shanghai 200030，China;3.State KeyLaboratoryof Physical Oceanography，Institute of Oceanographic Instrumentation， Qilu University of Technology （Shandong Academy of Sciences）， Qingdao 266061， China; 4.Ocean College，Zhejiang University，Zhoushan 316021，China）

Abstract：Thevolume scatering function（VSF）of aquatic particles is oneof the most important inherent optica properties of water.However，a VSF measurement instrument in China that can cover multiple wavelengths and a wide angular range remains to be investigated. Herein，we developed a dual-wavelength （ 488nm and 532nm ）aquaticparticle VSF measurement system that integrates dual-periscope optical configuration with arotating detector.This system enables VSF measurements across a scattering angle range of 1.5∘～178.5∘ for both wavelengths. According to the optical configurationandradiativetransferprinciplesof thesystem，baselinecorrction，angularcalibration，andamplitude calibration experiments were conducted on the system. The measurement results for 3μm polystyrene standard particles agreed wellwith the Mie scatering theoretical values，demonstrating theVSF measurementaccuracyof the system.The system was usedtoperformdual-wavelength VSF measurements of natural seawater particles from theEast China Sea and South China Seaand toanalyze the diferences in VSF characteristics between the two wavelengths.The measured VSFs canprovidea basisforVSFparameterizationintheradiative transfermodels.Inadion，asymmetry factors were calculated from the measureddatatoanalyze the diferences in scattring characteristics between the two wavelengths from the volume scattering perspective.

Key words ：ocean optics；volume scatering function； scattering phase function；asymmetry factor；aquatic particle optical properties of water； scattering measurement

海洋主被动光学遥感领域中，水体颗粒体散射函数（VSF）是极其重要的固有光学量（IOP）之一[1-2]，它在水体光学辐射传输过程中发挥着主导作用。（剩余10544字）