[A-OS19] Physical Oceanography (General)

[AOS19-P04] Meridional heat transport in the North Pacific subtropical gyre -Analysis by ARMOR 3D-

*Yukina Fukaumi¹, Kazuyuki Uehara¹ (1.The Graduate School of Marine Science and Technology of Tokai University)

Keywords:heat transport, Subtropical gyre

To clarify heat transports of the ocean interior is very important to understand the climate variability, because thermal inertia in the Ocean is larger than that of the atmosphere. In this study, we report the north-south ocean heat transports using ARMOR3D which are ocean three dimensional dataset and are based by in situ observations. First of all, we computed relative geostrophic velocities setting the reference level as the deepest layer from 3D-temperature and salinity fields. We then computed the volume transports and heat transports from these relative velocities. And we also computed the same two transports using the absolute geostrophic velocities in ARMOR3D. The northward relative volume and heat transports across the 25N-latitude line as one-year average in 2018 were calculated to be 57.2 Sv and 1.8 PW, respectivey. The northward absolute transports were 126.3 Sv and 2.8 PW. At the time of our presentaion on the day, we will discuss time variabilities of each transports of each ocean basins.