| 北部湾后向散射系数的时空分布与变化分析 |
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| 引用本文： | 王浩宏,刘大召.北部湾后向散射系数的时空分布与变化分析[J].海洋技术,2020,39(3):1-7. |
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| 作者姓名： | 王浩宏 刘大召 |
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| 作者单位： | 广东海洋大学电子与信息工程学院,广东 湛江 524088;广东海洋大学电子与信息工程学院,广东 湛江 524088;南海资源大数据中心南方海洋科学与工程广东省实验室(湛江),广东 湛江 524002 |
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| 基金项目： | 南方海洋科学与工程广东省实验室(湛江)资助项目;国家级大学生创新创业训练计划项目 |
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| 摘 要： | 后向散射系数是固有光学量中散射系数的重要组成部分,在海洋水色遥感反演中具有重要的作用。本文对比分析了北部湾2017年冬季和2018年夏季41个站位点所测得的数据,得到后向散射系数的空间分布以及后向散射系数与悬浮泥沙之间的关系,主要获得如下结论:(1)后向散射系数光谱曲线呈现平缓减少趋势,各个波段的后向散射系数的光谱模型呈乘幂形式;(2)北部湾后向散射系数空间分布特征受潮汐洋流的控制,表现为近岸高值、离岸低值的特征,与黄海、东海等海域后向散射系数空间分布相类似,而且冬季高值区域分布比夏季大;(3)后向散射系数与悬浮泥沙质量浓度相关性较好,其判定系数R2=0.69,可建立与悬浮泥沙质量浓度的关系模型。
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| 关 键 词： | 北部湾 后向散射系数 时空分布 悬浮泥沙质量浓度 |
Spatio-temporal Distribution and Variation Analysis of Backscattering Coefficient in Beibu Gulf |
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| WANG Hao-hong,LIU Da-zhao.Spatio-temporal Distribution and Variation Analysis of Backscattering Coefficient in Beibu Gulf[J].Ocean Technology,2020,39(3):1-7. |
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| Authors: | WANG Hao-hong LIU Da-zhao |
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| Institution: | (School of Electronics and Information Engineering,Guang Dong Ocean University,Zhanjiang 524088,Guangdong Province,China;Marine Resources Big Data Center of South China Sea,Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang),Zhanjiang 524002,Guangdong Province,China) |
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| Abstract: | Backscattering coefficient is an important part of intrinsic optical quantity,and plays an important role in ocean color remote sensing inversion.The spatial distribution of backscattering coefficient and the relationship between backscattering coefficient and suspended sediment were obtained by comparing and analyzing the data measured at 41 stations in Beibu Gulf in winter of 2017 and summer of 2018.The main conclusions are as follows:(1)the spectral curve of backscattering coefficient shows a gentle decreasing trend,and the spectral model of backscattering coefficient in each band is in the form of power;(2)Beibu Gulf The spatial distribution of backscattering coefficient is controlled by tidal current,which is characterized by high value near shore and low value offshore,which is similar to the spatial distribution of backscattering coefficient in Yellow Sea,East China Sea and so on.Besides,the distribution of high value area in winter is larger than that in summer;(3)There is a good correlation coefficient between backscattering coefficient and suspended sediment mass concentration,and its coefficient of determination R2=0.69,the relationship model between backscattering coefficient and suspended sediment mass concentration can be established. |
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| Keywords: | Beibu Gulf backscattering coefficient spatial and temporal distribution suspended sediment mass concentration |
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