VARIABILITY OF BIO-OPTICAL CHARACTERISTICS IN ECOSYSTEMS OF PETER THE GREAT BAY (SEA OF JAPAN)-Reference-Cited by-同舟云学术

VARIABILITY OF BIO-OPTICAL CHARACTERISTICS IN ECOSYSTEMS OF PETER THE GREAT BAY (SEA OF JAPAN)

Published:2017-10-12 Issue: Volume: Page:
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Container-title:Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI)
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Author:

Shtraikhert Elena¹,Shtraikhert Elena¹,Zakharkov Sergey¹,Zakharkov Sergey¹

Affiliation:

1. V.I. Il’ichev Pacific Oceanological Institute

Abstract

Variability of the bio-optical characteristics may be as indicator of changes in the functioning of ecosystems, for example the eutrophication, the organic matter pollution and the hypoxia of water body. In this work we study according to data, obtained by means of the satellite MODIS-Aqua spectroradiometer, the variability of bio-optical characteristics (concentration and fluorescence of chlorophyll-a (Cchl and Fchl), coefficients of light absorption by detritus and yellow substance (adg) and light backscattering by suspended particles of mineral and biological origin (bbp)) along sections extending from the shelf (Amur and Ussuri Bays) toward the seaward area of Peter the Great Bay from January to December of 2007, 2008, 2013, 2014. Features of the seasonal Cchl satellite variability along the selected sections were shown. It is noticed that the highest Cchl satellite values are characteristic for the Amur Bay, usually from place of confluence of the Razdolnaya River from late May - June to August – September. Separate cases of increased values of bbp in area, which stretches from the Vladivostok coast, were revealed. In the first case, the area of the increased values of bbp corresponded to area, having the Fchl values close to zero, and in second case – to area with the increased Fchl. Possible, the first case can be caused by the increase in content of the mineral origin suspension because of some building works, and the second case is due to the discharge of water by reservoirs. It is noticed that the increased values of bio-optical characteristics except Fchl are characteristic for the scenarios with the increased wind speed and after the atmospheric precipitation. Increased Fchl values are characteristic at the sufficient rainfall, contributing to rising of the rivers level, or the increase of wind speed to about 8 m/s and above.

Publisher

Academus Publishing

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