遥感技术在河口颗粒态总磷分布及扩散研究中的应用初探

张霄宇; 林以安; 唐仁友; 潘德炉; 王迪峰; 龚芳

遥感技术在河口颗粒态总磷分布及扩散研究中的应用初探

1.
国家海洋局海洋动力过程与卫星海洋学开放实验室, 浙江, 杭州, 310012;浙江大学, 地球科学系, 浙江, 杭州, 310012
2.
国家海洋局海洋动力过程与卫星海洋学开放实验室, 浙江, 杭州, 310012

基金项目: 国家重点基础研究发展规划资助项目(G199993704);“863”计划资助项目(2003AA131160)

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出版历程
- 收稿日期: 2003-09-04
- 修回日期: 2004-07-28

Preliminary study of concentration distribution of total particulate phosphorus in estuary by remote sensing technology

1.
Key Laboratory of Ocean Dynamic Process and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China;Department of Science of Earth, Zhejiang University, Hangzhou 310012, China
2.
Key Laboratory of Ocean Dynamic Process and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 以美国SeaStar卫星装载的SeaWiFS海洋水色遥感传感器作为遥感数据源,实测了光谱、海表温度、悬浮物含量、透明度、叶绿素浓度、颗粒态总磷含量等,建立了传感器悬浮物含量和颗粒态总磷含量的遥感信息提取模式,结果表明:(1)利用遥感技术估算的海水悬浮物的平均相对偏差为18.1%;(2)悬浮物在遥感图象上的分布和扩散趋势与实际吻合,并且在一定程度上反映了区域内海流运移路径;(3)颗粒态总磷含量在长江河口和杭州湾附近海域较高,由近岸向远岸迅速降低,与实际分布相符;(4)模型主要适用于河口等悬浮物含量高的Ⅱ类水休,对于以浮游植物为主的Ⅰ类水体应另外建立模式.
- 长江口近海 /
- SeaWiFS /
- 模型 /
- 悬浮物 /
- 颗粒态总磷
Abstract: The SeaWiFS loaded on SEASTAR is used as remote sensing data source.With the in-situ data of suspended sedmient concentration (SSC) and total particulate phosphorus(TPP),and inverse regression equation,which suggests the exponential relationship between in-situ suspended sedmient concentration data and in-situ radiance data,is employed:y_SSC=0.382 6exp[4.9748(R₆₇₀/R₅₅₅)],r² =0.9179.Meanwhile the concentration of particulate phosphorus can be obtained by the following algorithm:y_TPP=0.0076_xSSC+0.1599,r²=0.720.So the distributive characteristics of suspended sedmients and particulate phosphorus in the Changjiang River Estuary and nearshore were retrived through satelite data.The result suggests that (1) the retrieved concentration distribution accords with the ground trouth,and reflects the actual transport path of ocean current to some extent;(2) the concentration of TPP declines gradually from inshore to offshore;and (3) the a lgorithm is only applicable for Case Ⅱ water,not for Case Ⅰ water.
- Changjiang Estuary /
- SeaWiFS /
- moldel /
- suspended sedmient /
- total particulate phosphorus

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