胶州湾及青岛近海水中颗粒物散射特性及其分类  

The Scattering Characteristics and Classifications of Particulate Matters in Jiaozhou Bay and Qingdao Coastal Areas

作　　者：刘晓燕 杨倩 陈树果[2] 胡连波 宗芳伊 刘巧君 LIU Xiao-yan;YANG Qian;CHEN Shu-guo;HU Lian-bo;ZONG Fang-yi;LIU Qiao-jun(Institute of Oceanographic Instrumentation,Qilu University of Technology(Shandong Academy of Sciences),Qingdao 266000,China;College of Information Science and Engineering,Ocean University of China,Qingdao 266000,China)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省科学院海洋仪器仪表研究所,山东青岛266000 [2]中国海洋大学信息科学与工程学院,山东青岛266000

出　　处：《光谱学与光谱分析》2020年第10期3102-3107,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41206165);山东省自然科学基金项目(ZR2019PD021,ZR2018QD004);山东省科学院科技发展基金项目[科基合字(2018)第6号]资助。

摘　　要：胶州湾位于山东半岛南部,是黄海西部的一个半封闭海湾,是北温带海湾生态系统的重要代表。由于水体交换能力不足,容纳的污染物总量较大,胶州湾及青岛近海水体富营养化问题突出,对其水质进行实时有效监测意义重大。2014年8月和2015年10月在胶州湾及青岛近海进行了两次海洋光学现场实验,测量海水固有光学性质。利用高光谱吸收衰减仪ac-s测量了海水吸收系数和衰减系数光谱剖面,并计算了海水散射系数光谱剖面;利用后向散射仪BB9(2014年航次)和HS6(2015年航次)测量了海水后向散射系数光谱剖面,并计算了水中颗粒物的后向散射比。利用现场测量数据,建立了悬浮粒子散射系数和后向散射系数光谱模型,以及532 nm处后向散射系数与散射系数的关系模型。利用后向散射比提供的粒子折射率信息分析了胶州湾及青岛近海海域的粒子组成及其空间分布情况。最后分析了悬浮粒子散射特性与浓度SPM的关系。研究结果表明:胶州湾内的散射系数b p和后向散射系数b bp值普遍高于青岛近海,并且胶州湾内越靠近岸边的站位,其值越大,胶州湾内站位的散射系数b p光谱斜率(m=0.56)较青岛近海站位大(m=0.44);胶州湾及青岛近海海域的粒子后向散射系数和散射系数之间存在幂指数回归关系;研究海域的粒子折射率在1.097~1.197之间,粒子组成以无机矿物粒子为主,两次现场实验的结果表明湾口站位(JZ1,QD1和QD7)的折射率变化不大。选取从湾内经湾口到青岛近海的站位组成断面,分析这些站位粒子折射率n p的分布发现,湾内从近岸(JZ9)到湾口(JZ1),粒子折射率逐渐增大,湾内粒子无机成分更多;青岛近海离岸越远(QD7—QD5),粒子折射率逐渐减小,有机粒子的成分增加。JZ6站位为靠近胶州湾大桥的站位点,粒子折射率明显小于大桥两边的站位。后向散射系数与SPM浓度之间存在线性回归和幂指�Jiaozhou Bay,located in the south of Shandong peninsula,is a semi-closed bay in the west of the Yellow Sea.It is an important representative of the north temperate gulf ecosystem.Because there are insufficient exchange capacities of water bodies and a large number of pollutants it contained,the eutrophication of the Jiaozhou Bay and Qingdao coastal water is still a significant problem.Therefore it is of great significance to effectively monitor the water quality of the regions in near-real time.In August 2014 and October 2015,two field experiments of ocean optics were conducted in the Jiaozhou Bay and Qingdao coastal area.The profiles of absorption spectra and attenuation spectra were measured using the high spectral absorption-attenuation meter ac-s,from which the profiles of scattering spectra were obtained.The backscattering meters,BB9 and HS6,were used to measure the profiles of the backscattering spectra in August 2014 and October 2015,respectively.Then the backscattering ratios of particles were calculated.Based on the measurements,the spectral models of scattering coefficients and backscattering coefficients of suspended particulate matters were developed,respectively.Moreover,the relationship model between the backscattering coefficient and scattering coefficient at 532 nm was developed as well.The particle composition and its spatial distribution in the Jiaozhou Bay and Qingdao coast area were analyzed using the refractive index information obtained from the backscatter ratio.Finally,the relationship between the scattering parameters and particle concentrations SPM was analyzed.The results show that the values of the scattering and backscattering coefficients in the Jiaozhou Bay are generally higher than those in the Qingdao coast area.The closer the stations are to the shore in Jiaozhou Bay,the greater the values are.The slope of the scattering spectral(m=0.56)in the Jiaozhou Bay is larger than that in the Qingdao coastal stations(m=0.44).There is a power regression between the backscattering coefficien

关 键 词：二类水体 海洋水色遥感 散射特性 粒子分类 胶州湾及青岛近海 

分 类 号：P733.3[天文地球—物理海洋学]