[A-OS09] 海洋混合学：物質循環・気候・生態系の維持と長周期変動の解明

[AOS09-03] CTD取り付け型微細構造観測手法の開発と北太平洋海盆規模乱流分布

*安田 一郎¹、後藤 恭敬²、長澤 真樹¹、李 根淙¹、中野 俊也²、纐纈 慎也³ (1.東京大学大気海洋研究所、2.気象庁、3.海洋研究開発機構)

キーワード：乱流、微細構造観測手法、海洋子午面循環、潮汐混合、北太平洋

A new efficient microstructure measurement with fast-response thermistors attached to CTD as common ship-based observational platforms were elaborated. This revealed cross-Pacific top-bottom turbulence distributions. Vertical distribution of turbulent energy dissipation is found to be proportional with local squared buoyancy frequency N²(representing density vertical gradient) and local internal tide energy generation and dissipation, indicating that main part of energy dissipation of tide-induced turbulence occurs in the main thermocline. These contribute to revising models of tide-induced three-dimensional distribution used in ocean/climate models, which will contribute to reproducing ocean meridional overturning circulation and oceanic heat/material circulation.