Atmospheric Input of Silica in Crimea and Factors Affecting it

A. V. Varenik, M. A. Myslina*, D. V. Tarasevich

Marine Hydrophysical Institute of RAS, Sevastopol, Russia

* e-mail: myslina@mhi-ras.ru

Abstract

Silica is one of the main nutrients (N, P, Si) and is a part of a large number of natural minerals, so it is constantly present in natural waters. It is mainly present as salts of silicic acid (silica). Atmospheric precipitation can be an important additional source of silica in the ecosystem. The purpose of this work is to estimate the silica content in the atmospheric precipitation based on long-term data, analyze the spatial and temporal variability of this content, and identify possible factors influencing the atmospheric silica input. The paper presents the results of continuous monitoring of silica input with the atmospheric precipitation in the Crimean coastal region in 2015–2021. Precipitation samples were collected in Sevastopol and Katsiveli in two types of samplers: a perma-nently open one to collect total (dry + wet) atmospheric precipitation and a wet-only one. It is shown that in the inter-annual dynamics of silica flux with the atmospheric precipitation in the both sampling points, the maximum input amount of this nutrient was determined in 2017–2018. The main factors influencing the amount of silica input with the atmospheric precipitation were determined. One of the main factors influencing the silica concentration in precipitation is the intensity of dust transport.

Keywords

silica, sampling, atmospheric precipitation, Crimea, dust atmospheric precipitation, long-term changes

Acknowledgments

The work was carried out under state assignment of FSBSI FRC MHI of RAS on the subject FNNN-2021-0005 “Coastal research”. The authors are grateful to the staff of the Sevastopol Marine Hydrometeorological Station and the Black Sea hydrophysical sub-satellite test site FSBSI FRC MHI of RAS for collecting the atmospheric precipitation samples and preparing them for transportation to the Marine Biogeochemistry Department of the FSBSI FRC MHI of RAS for chemical analysis.

For citation

Varenik, A.V., Myslina, M.A. and Tarasevich, D.V., 2023. Atmospheric Input of Silica in Crimea and Factors Affecting it. Ecological Safety of Coastal and Shelf Zones of Sea, (1), pp. 77–90. doi:10.29039/2413-5577-2023-1-77-90

DOI

10.29039/2413-5577-2023-1-77-90

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