CAJ | 학술논문

依据珠江口及其附近海域2006-2007年4个航次的CTD资料，分析珠江冲淡水的扩展形态和垂向结构，结果表明：表层冲淡水仅在夏季同时向粤西和粤东扩展，其余季节以西向扩展为主，而底层冲淡水全年向西扩展；冲淡水的主体部分大致位于10 m水深之上，但最大厚度在秋季可以超过20 m水深。通过结合同期风、海流、潮汐资料分析发现径流和风是控制冲淡水扩展范围和垂向结构的关键因子，夏季珠江冲淡水的范围最广，其次是春季，冬季最窄；夏季西南季风有利于其向东及向外海扩展，东北季风驱使珠江冲淡水向西扩展并制约冲淡水向外海扩散；粤西的水位梯度全年都驱动沿岸流向西流，而粤东的水位梯度仅在夏季有利于珠江冲淡水东向扩散，相应的粤东沿岸流在夏季指向东北，其余季节均指向西南。
의거주강구급기부근해역2006-2007년4개항차적CTD자료，분석주강충담수적확전형태화수향결구，결과표명：표층충담수부재하계동시향월서화월동확전，기여계절이서향확전위주，이저층충담수전년향서확전；충담수적주체부분대치위우10 m수심지상，단최대후도재추계가이초과20 m수심。통과결합동기풍、해류、조석자료분석발현경류화풍시공제충담수확전범위화수향결구적관건인자，하계주강충담수적범위최엄，기차시춘계，동계최착；하계서남계풍유리우기향동급향외해확전，동북계풍구사주강충담수향서확전병제약충담수향외해확산；월서적수위제도전년도구동연안류향서류，이월동적수위제도부재하계유리우주강충담수동향확산，상응적월동연안류재하계지향동북，기여계절균지향서남。
The Pearl River diluted water (PRDW)plume shape and vertical structure were analyzed based on the CTD data observed in the Pearl River estuary and surrounding sea areas during 2006 to 2007. The results showed that the surface of PRDW expanded both westward and eastward in summer, and expanded mainly westward in other seasons,however,the bottom of PRDW expanded westward for the whole year. The main part of the PRDW located at upper 10 m,and the maximum thickness could exceed 20 m in autumn. According to the wind, current and tide data in the corresponding period, the key factors for PRDW plume range and vertical structure were analyzed, which were mainly affected by river discharge and wind. The plume size was largest in summer,medium in autumn, while it was smallest in winter. The southwest monsoon was conducive to the eastward and offshore expansion of PRDW, while the northeast monsoon drove PRDW to expand westward and constrained the offshore expansion. The sea level gradient along the west coast of Guangdong province drove the long shore current flow westward for the whole year, however, the sea level gradient along east coast was only favorable to eastward expansion of PRDW in summer, and the long shore current flowed northeastward in summer and southeast in other seasons.