海洋通报
海洋通報
해양통보
MARINE SCIENCE BULLETIN
2014年
5期
533-540
,共8页
王腾%刘广鹏%朱礼鑫%高磊%李道季
王騰%劉廣鵬%硃禮鑫%高磊%李道季
왕등%류엄붕%주례흠%고뢰%리도계
长江口%冬季%夏季%溶解有机碳(DOC)
長江口%鼕季%夏季%溶解有機碳(DOC)
장강구%동계%하계%용해유궤탄(DOC)
Yangtze Estuary%winter%summer%dissolved organic carbon (DOC)
根据2013年1月与8月两个航次测得的数据分析了长江口邻近海域溶解有机碳（DOC）在冬、夏两个季节的含量、分布以及影响因素。结果表明，冬季表、底层DOC浓度范围分别介于35.85~145.11μM和33.60~110.52μM之间，平均值分别为79.15μM与68.99μM；夏季表、底层DOC浓度范围分别为63.48~213.65μM和44.69~123.34μM，平均浓度值分别为100.49μM与61.56μM。由于冬、夏两个季节长江冲淡水径流量、现场浮游植物生物量以及流场状况等控制因素的不同，导致两个季节DOC分布特征具有一定区别。水平分布上，整体都表现出从近岸到外海逐渐降低的趋势；垂直分布上，冬季表底层浓度差距很小，夏季浓度由表层向底层不断降低。长江冲淡水输送是该区域DOC的主要来源，相对于冬季，夏季生物活动过程中的释放对表层水体DOC的浓度具有较大的贡献。
根據2013年1月與8月兩箇航次測得的數據分析瞭長江口鄰近海域溶解有機碳（DOC）在鼕、夏兩箇季節的含量、分佈以及影響因素。結果錶明，鼕季錶、底層DOC濃度範圍分彆介于35.85~145.11μM和33.60~110.52μM之間，平均值分彆為79.15μM與68.99μM；夏季錶、底層DOC濃度範圍分彆為63.48~213.65μM和44.69~123.34μM，平均濃度值分彆為100.49μM與61.56μM。由于鼕、夏兩箇季節長江遲淡水徑流量、現場浮遊植物生物量以及流場狀況等控製因素的不同，導緻兩箇季節DOC分佈特徵具有一定區彆。水平分佈上，整體都錶現齣從近岸到外海逐漸降低的趨勢；垂直分佈上，鼕季錶底層濃度差距很小，夏季濃度由錶層嚮底層不斷降低。長江遲淡水輸送是該區域DOC的主要來源，相對于鼕季，夏季生物活動過程中的釋放對錶層水體DOC的濃度具有較大的貢獻。
근거2013년1월여8월량개항차측득적수거분석료장강구린근해역용해유궤탄（DOC）재동、하량개계절적함량、분포이급영향인소。결과표명，동계표、저층DOC농도범위분별개우35.85~145.11μM화33.60~110.52μM지간，평균치분별위79.15μM여68.99μM；하계표、저층DOC농도범위분별위63.48~213.65μM화44.69~123.34μM，평균농도치분별위100.49μM여61.56μM。유우동、하량개계절장강충담수경류량、현장부유식물생물량이급류장상황등공제인소적불동，도치량개계절DOC분포특정구유일정구별。수평분포상，정체도표현출종근안도외해축점강저적추세；수직분포상，동계표저층농도차거흔소，하계농도유표층향저층불단강저。장강충담수수송시해구역DOC적주요래원，상대우동계，하계생물활동과정중적석방대표층수체DOC적농도구유교대적공헌。
Based on data from two cruises that were carried out in the adjacent sea area of the Yangtze Estuary in January and August, 2013, the concentration and distribution of the Dissolved Organic Carbon ( DOC) , as well as its influencing factors were analyzed. The results showed that the concentration of DOC was 35.85~145.11μM in the surface water, 33.60~110.52 μM in the bottom water in winter, respectively, and the mean values were 79.15 and 68.99 μM, respectively. And in summer, the concentration of DOC was 63.48~213.65 μM in the surface water, 44.69~123.34μM in the bottom water, respectively, and the mean values were 100.49 and 61.56μM, respectively. And the DOC had different distribution characteristics that were caused by different controlling factors ( Changjiang diluted water, phytoplankton biomass and currents) in the two seasons. The concentration of DOC was higher in the nearshore water than that in the offshore water in both seasons. As to the vertical distribution, there was little difference between the surface and bottom waters in winter, while the DOC concentration decreased gradually from the surface water to the bottom water in summer. Compared with that in winter, the biological effects were important to the surface DOC concentration in summer.
