4.3 Article

Effects of different conditions on particle dynamics and properties in West-Estonian coastal areas

期刊

OCEANOLOGIA
卷 64, 期 4, 页码 694-716

出版社

POLISH ACAD SCIENCES INST OCEANOLOGY
DOI: 10.1016/j.oceano.2022.06.006

关键词

Suspended particulate matter; Inherent optical properties; Backscattering ratio; Particle size distribution; Aggregation

资金

  1. European Union [730066]
  2. Estonian Research Council [PUTJD719, PRG302, PSG 10]

向作者/读者索取更多资源

This study used satellite sensors to monitor water in the Baltic Sea and investigated the properties of suspended particulate matter (SPM). The results showed that concentrations, absorption, scattering, and backscattering of SPM varied temporally and spatially, and the spectral backscattering ratio was wavelength-dependent and influenced by particle origin, size distribution, weather conditions, and location.
Satellite sensors are used to monitor water on a large scale. One of the key vari-ables defining the water-leaving signal is suspended particulate matter (SPM) and thus it is important to understand its properties to improve remote sensing algorithms. However, only a few studies investigating the variability of SPM properties (concentration, nature and size) un-der different seasonal, weather and geographical conditions have been carried out in the Baltic Sea. We focused on relatively shallow areas (maximum depth of 10 m) where there is strong sediment transport by rivers and resuspension of the particles by wave action and advection by currents. Eleven field campaigns were conducted using a set of instruments measuring inher-ent optical properties, auxiliary data, and, in Parnu Bay, also particle size distributions. The results showed that the SPM concentrations, particulate absorption, mass-specific particulate scattering, and backscattering varied temporally and spatially from 5.5-19.6 g m-3, 0-5.62 m-1, 0.08-1.45 m 2 g-1, and 0.0009-0.25 m 2 g-1, respectively. The spectral backscattering ra-tio, which in general is considered to be constant in bio-optical remote sensing algorithms, was actually wavelength-dependent and varied between 0.005 and 0.09 depending on the origin of the particles (organic or mineral matter), particle size distribution, weather conditions, and location. In situ particle size measurements in coastal waters of Parnu Bay also showed that resuspended fine clay particles agglomerated into flocs of > 30 mu m in the brackish waters of the Baltic Sea having random shapes and different sizes.(c) 2022 Institute of Oceanology of the Polish Academy of Sciences. Production and host-ing by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ).

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据