IA Nemirovskaya and AM Titova
Shirshov Institute of Oceanology, Russia
Posters & Accepted Abstracts: J Oceanogr Mar Res
The concentrations of suspended particulate matter (SPM) and particulate forms of the organic compounds (hydrocarbons, lipids, and chlorophyll a) were determined in the surface water layer and aerosols of the Atlantic Ocean in February-May 2012, 2014 and 2015 and the Indian Ocean in December 2015-February 2016 and January-March 2017. The route of the vessel covered tropical, subtropical, and moderate zones in the humid and arid regions of the oceans. Suspensions and organic matter were assayed by routine methods used in oceanology. It was stated that the distribution of concentrations of the studied components is mainly affected by the location of frontal zones and seasonal variability. Circumcontinental zonality is manifested in the increase of aerosol concentrations in coastal regions: the shores of South America â?? because of the streams of Patagonia, and the coasts of Europe, from humid regions and industrial centers (in the Atlantic Ocean) and Malacca, Bab-El-Mandeb straits and Suez channel (in the Indian Ocean). However, the highest increase of the concentration of aerosols was influenced by the migration from arid zones of the African deserts in the middle Atlantic and of the Arabian Peninsula in the Gulf of Aden and the Red Sea. The last led to increasing of SPM concentrations in the surface waters in arid zones. However, in surface waters, the distribution of SPM and organic compounds is also affected by the water productivity and the flow of hydrocarbons from the oil pollution. The lowest concentrations of suspended matter were observed in the central waters of the Indian Ocean and Mediterranean Sea. The occasional sharp increase of hydrocarbon concentrations caused by anthropogenic pollution was registered at local parts of water areas in the east of the Atlantic Ocean.
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