东海陆架表层水体有机与无机悬浮体的季节分布特征  

Seasonal distributions of organic and inorganic particulate in the surface-layer over the shelf of the East China Sea

作　　者：崔倩芳[1] 潘德炉[2] 白雁[2] 何贤强[2] 

机构地区：[1]南京理工大学计算机科学与技术学院,江苏南京210094 [2]卫星海洋环境动力学国家重点实验室,国家海洋局第二海洋研究所,浙江杭州310012

出　　处：《海洋学研究》2012年第4期55-64,共10页Journal of Marine Sciences

基　　金：国家重点基础研究发展计划资助项目(2009CB421202);国家海洋公益性行业科研专项经费资助项目(200905012);国家自然科学基金资助项目(40706061,40976110);国家高技术研究发展计划资助项目(2007AA12Z137,2008AA09Z104,2007AA092201)

摘　　要：利用2011年春季(5-6月)、2009年夏季(8月)、2010年秋季(11-12月)和2009年冬季(12月-次年1月)4个航次实测的悬浮体质量浓度资料,分析了东海陆架表层水体总悬浮体、有机悬浮体和无机悬浮体质量浓度的季节分布特征。结果表明,东海陆架表层水体总悬浮体质量浓度冬半年高于夏半年,等值线基本平行于岸线,在浙江沿岸29°N附近有一浑水舌向东南方向延伸,常年存在2个高值中心和2个次高值中心。有机悬浮体质量浓度则为夏半年高于冬半年,存在2个高值中心和2个次高值中心,季节变化显著。无机悬浮体质量浓度分布趋势相似于总悬浮体质量浓度,但整体轮廓线向近岸收缩约0.5°,常年存在2个高值中心和1个次高值中心。有机悬浮体占总悬浮体百分比按季节从高到低依次为春季、夏季、冬季和秋季,其中长江口、杭州湾外近海海域和黑潮区为东海有机悬浮体百分含量高值区。Using the data of suspended particulate matter mass concentration measured in four seasonal cruises of spring in May to June 2011, summer in August 2009, autumn from November to December 2010, and winter from December 2009 to January 2010, seasonal distributions of the suspended organic and inorganic matters in the surface-layer over the shelf of the East China Sea （ECS） were analyzed. The results show that the mass concentration of total suspended particulate matter （TSM） is higher in the winter half year than that in the summer half year, and higher inshore than offshore. The isolines are parallel to the shoreline as a whole. There is a turbid water tongue stretching southeastward with notably seasonal variation near 29°N off Zhejiang Province, and there are two centers of high mass concentration near the Changjiang River Estuary and Yushan Islands of Zhejiang Province and two centers of less high mass concentration centered at 32°N, 125°E and 30°N,127°E respectively all the year round. The high TSM mass concentration front （10 mg/L） is usually parallel to the shoreline. It occurs seasonally near the 40-60 m isobath and often separated into two parts in the northern ECS. The less high TSM mass concentration front （3 mg/L） is not parallel to the shoreline because of a turbid water tongue stretching southeastward all the year round at 29 °N. It appears near the 30-40 m isobath in the northern ECS, near the 50-90 m isobaths in the central ECS, and near the 50-80 m isobath in the southern ECS in different seasons. In contrast, the particulate organic matter （POM） mass concentration is higher in the summer half year than that in the winter half year, Like the TSM, there are two centers of high value and two centers of less high value seasonally. The distribution pattern and magnitude of the particulate inorganic matter （PIM） mass concentration is similar to that of TSM, but the contours shrink shoreward by about 0.5°. There are also two high value centers near the Changjiang River Estu

关 键 词：东海陆架 表层水体 总悬浮体 无机悬浮体 有机悬浮体 季节分布 

分 类 号：P734.23[天文地球—海洋化学]