Host: Abstracts of Annual Meeting of the Geochemical Society of Japan
Name : Abstracts of Annual Meeting of the Geochemical Society of Japan
Number : 69
Date : September 05, 2022 - September 16, 2022
Pages 162-
Material exchange between the atmosphere and the ocean takes place through the surface of the ocean. On the other hand, when phytoplankton-derived substances accumulate on the surface of the ocean due to the bloom, this exchange rate is considered to decrease. Transparent exopolymer particles (TEP) are mainly formed from dissolved poly-saccharides in which phytoplankton exudes to the outside of the cell, and their specific density is lighter than that of seawater, so they rise toward the ocean surface. Since TEP may be accumulated on the ocean surface in the spring Oyashio region, we participated in the Shunyou-Maru (SY1905) cruise in this study, and investigated the phytoplankton abundance (Chl. a) and TEP of the ocean surface micro layer (SML) and surface water. It was revealed that the concentration of Chl. a and TEP in the Oyashio region were 1.1–3.1 times and 1.7–8.8 times higher in SML than in the surface water collected in the bucket, respectively. From the results of the culture experiment conducted on the deck of the ship, it was considered that the TEP accumulated in SML was supplied from the surface layer of the ocean.
