日本地球惑星科学連合2018年大会

講演情報

[EJ] ポスター発表

セッション記号 A (大気水圏科学) » A-OS 海洋科学・海洋環境

[A-OS14] 陸域と海洋をつなぐ水循環の素過程

2018年5月22日(火) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:木田 新一郎(九州大学・応用力学研究所)、山崎 大(東京大学生産技術研究所)、三寺 史夫(北海道大学低温科学研究所、共同)、山敷 庸亮(京都大学大学院総合生存学館)

[AOS14-P04] Potential impacts of the freshwater flux from the Kamchatka Peninsula on the dense shelf water formation in the Sea of Okhotsk

*三寺 史夫1 (1.北海道大学低温科学研究所)

キーワード:カムチャツカ半島、大気-陸域-海洋連関、淡水輸送

Dense Shelf Water (DSW) in the Sea of Okhotsk forms over the northern continental shelf. DSW entrains a lot of materials, such as dissolved oxygen, CO2 and iron, from the continental shelf region and carries them to the North Pacific through the intermediate layer. The overturning circulation associated with DSW is controlled by salinity. One of primary controlling factors of salinity is brine rejection when sea ice forms. Another controlling factor is salinity of the surface inflow to the continental shelf region from the North Pacific Ocean. In this project, we focus on the latter, with a special attention to the effects of freshwater flux from the Kamchatka Peninsula. We found in a previous study that the precipitation over the Kamchatka Peninsula is significantly correlated with the DSW salinity, where the precipitation can explain one-third of the variability of DSW salinity. We aim to quantify the effects of this freshwater process throughout atmosphere, land and ocean. In this poster presentation, results of a numerical experiment on the DSW overturn in the presence or absence of the riverine freshwater flux from the Kamchatka Peninsula are discussed.