空间科学学报2023，Vol.43Issue(6)：1069-1080,12.DOI:10.11728/cjss2023.06.2023-0059
基于遥感数据的夏季长江冲淡水年际间扩展规律及其影响因素
Analysing Interannual Variation of Changjiang Diluted Water Spreading and Its Influencing Factors Based on Remote Sensing Observations
摘要
Abstract
Expansion of the Changjiang Diluted Water(CDW)to the outer sea has a significant im-pact on the hydrobiological environment and material cycle in the Yellow Sea and the East China Sea.Based on 17 years of satellite fusion data from 1998 to 2014,this paper studies the inter-annual varia-tions of the CDW spreading to the outer sea in summer,analyzes the influences of runoff and wind field on these changes.The result shows that the expansion path is mainly divided into three types:north-east-north type,northeast type and occasional type,in which northeast type is in the majority.The east-ern boundary of the CDW expansion appears obviously inter-annual variations,and it mainly dis-tributes in the range of 123°E to 126°E.The inter-annual variation of the expansion process is mainly re-flected in the changes of expansion path and the distance of eastern expansion from July to August.The amount of runoff plays an important role in the distance of CDW expansion to the outer sea.When the runoff is large,the diluted water expands farther eastward,while when the runoff is small,the diluted water is limited near the Yangtze River estuary.The diversity of expansion process is obviously affected by wind direction.Southeast wind and east wind promote the expansion of diluted water in the north-east direction,and prevent the expansion in the southeast direction to some extent.Northeast wind pre-vents the expansion to the outer sea,forcing the diluted water staying near the Yangtze River estuary.关键词
空间遥感/长江冲淡水/年际变化Key words
Remote sensing data/Changjiang diluted water/Interannual variation分类
海洋科学引用本文复制引用
胡静雯,王其翔,郭志谦,刘晓燕,吴志宏,董文隆,田林..基于遥感数据的夏季长江冲淡水年际间扩展规律及其影响因素[J].空间科学学报,2023,43(6):1069-1080,12.基金项目
潍坊市卫星遥感智能解译技术重点实验室开放基金资助(SYS202303) （SYS202303）
