Measuring the salinity of the Clyde Sea from remotely sensed ocean colour
Measuring the salinity of the Clyde Sea from remotely sensed ocean colour
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DOI：
10.1016/s0272-7714(02)00399-2
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发表时间：
2003-07-01
影响因子：
2.8
通讯作者：
Bowers, DG
中科院分区：
文献类型：
--
作者：
Binding, CE;Bowers, DG
本文介绍了一种新的方法，从遥感海洋颜色的表面盐度。该方法是基于两个重要的观测光学特性的淡水影响（ROFI）的地区。第一种是一种溶解有机物（黄色物质）在浓度较高时对海洋颜色的强烈影响。二是盐分与淡水径流中的黄色物质关系密切。在本文中，这些关系证明了克莱德海，苏格兰，并适用于SeaWiFS图像的黄色物质和表面盐度的推导。在这项研究中证明的经验关系，允许令人满意的预测黄色物质和盐度在克莱德海从遥感海洋颜色。均方根在盐度为16至34的范围内，黄色物质和盐度的观测参数与预测参数之间的差异分别为0.19 m（-1）和1.1。根据卫星检索的海洋颜色绘制的盐度图确定了迄今为止仅通过现场仪器观测到的表面盐度分布特征。例如，本研究中得出的盐度分布表明，克莱德盆地存在一个逆环流，这是由来自克莱德河的淡水输入和来自北海峡的更多盐水入侵共同驱动的。克莱德海的深水运动已有很好的文献记载（Proc. R. Soc. 90 B（1986）67），然而，地表水的剩余循环仍然不确定。因此，获得本文所介绍的盐度天气图的能力为进一步了解陆架海和沿海动力学提供了巨大的潜力。(C)2003 Elsevier Science B. V.保留所有权利。
This paper describes a novel method of deriving surface salinity from remotely sensed ocean colour. The method is based on two important observations of optical properties in regions of freshwater influence (ROFI). The first is the strong effect that a form of dissolved organic matter (yellow substance) has on ocean colour when present in relatively high concentrations. The second is the close relationship between salinity and yellow substance originating from fresh water runoff. In this paper these relationships are demonstrated for the Clyde Sea, Scotland, and applied to SeaWiFS imagery for the derivation of yellow substance and surface salinity. The empirical relationships demonstrated in this study allow the satisfactory prediction of yellow substance and salinity in the Clyde Sea from remotely sensed ocean colour. The r.m.s. difference between the observed and predicted parameters are 0.19 m(-1) and 1.1 for yellow substance and salinity, respectively, over a range of salinity from 16 to 34.Salinity maps created from the satellite-retrieved ocean colour identify features in the surface salinity distribution that to date have only been observed by in situ instrumentation. For example, the salinity distribution derived in this study is suggestive of an anticlockwise circulation in the Clyde Basin, driven both by the input of fresh water from the River Clyde and the intrusion of more saline water from the North Channel. The movement of deep water in the Clyde Sea has been well documented (Proc. R. Soc. Edinb. 90B (1986) 67), however, the residual circulation of surface water remains uncertain. The ability to obtain synoptic views of salinity such as those presented in this paper therefore provides great potential in furthering the understanding of Shelf Sea and coastal dynamics. (C) 2003 Elsevier Science B.V. All rights reserved.