摘要
水体透明度(Z_(sd))是评价水质状况的重要光学参数。本文针对南黄海海域,面向MODIS传感器校正了Z_(sd)遥感反演模型,进而利用MODIS近20年(2002-2020年)数据分析了南黄海Z_(sd)的时空变化特征及其驱动力,结果显示:建立的Z_(sd)反演模型具有良好的精度(决定系数为0.91,均方根误差为1.69 m,平均相对误差绝对值为25.1%);南黄海Z_(sd)在空间上呈现外海高近岸低的特点、在时间上呈现冬低夏高的季节变化特征,近20年来南黄海中部、南黄海南部、长江口的Z_(sd)均在缓慢增加,而江苏近岸的Z_(sd)呈现出缓慢降低趋势;Z_(sd)受悬浮颗粒物浓度的负向驱动,其影响最大;此外,海表温度和光照强度对Z_(sd)都呈正向驱动,而风速呈负向驱动。
Water transparency (Z_(sd)) is an important optical parameter for evaluating water quality.This paper tuned a remote sensing model for estimating Z_(sd) from MODIS (moderate resolution imaging spectroradiometer) data in the South Yellow Sea.This model was then used to analyze the spatial and temporal variations of Z_(sd) in the South Yellow Sea based long-term MODIS data in the past 20 years (2002-2020),and their driving factors were examined The results show that the Z_(sd) estimation model has good accuracy with R2,root mean square error and mean absolute percent error values of 0.91,1.69 m and 25.1%,respectively.The Z_(sd) levels are generally high in the offshore but low in the coastal area.Meanwhile,Z_(sd) indicates high values in summer but low values in winter.In the past 20years,Z_(sd) in the central South Yellow Sea,the southern South Yellow Sea and the Changjiang River Estuary showed slowly increase trends,while Z_(sd) in the Jiangsu coast was decreasing slowly.In general,the Z_(sd) is negatively driven by the concentration of suspended particulate matter,of which the influence is the greatest.In addition,sea surface temperature and solar radiation have positive driving effects on Z_(sd),while wind speed has negative driving effect.
作者
叶晗
史玥双
梁涵玮
毛颖
周振宇
郑秀蕊
王胜强
孙德勇
Ye Han;Shi Yueshuang;Liang Hanwei;Mao Ying;Zhou Zhenyu;Zheng Xiurui;Wang Shengqiang;Sun Deyong(School of Marine Sciences,Nanjing University of Information Science&Technology,Nanjing 210044,China;Key Laboratory of Coastal Zone Exploitation and Protection,Ministry of Natural Resources,Nanjing 210024,China;School of Geographic Sciences,Nanjing University of Information Science&Technology,Nanjing 210044,China;Meteorological Disasters Defending Technique Centre of Fujian Province,Fuzhou 350005,China;Changwang School of Honors,Nanjing University of Information Science&Technology,Nanjing 210044,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2022年第3期128-136,共9页
基金
国家自然科学基金(42176181,42176179,42106176)
自然资源部海岸带开发与保护重点实验室开放基金(2019CZEPK07)
遥感科学国家重点实验室开放基金(OFSLRSS202103)
江苏省自然科学基金(BK20211289,BK20210667)
大学生创新创业训练计划(202010300189)。
