yukio masumoto

Sharing the results of high-resolution ocean general circulation model under a multi-discipline

frame work-a review of OFES activities

Yukio Masumoto

Outline

• Introduction• Model description• OFES runs and outputs• Analyses of physical aspect using OFES results• Analyses of biogeochemical/ecosystem

aspects using OFES results

Introduction

• OFES (OGCM for the Earth Simulator)– Project of Japan Agency for Marine-Earth Science

and Technology (JAMSTEC)– Consider the limitation of high-resolution

modeling effort– Share the invaluable output among physical,

geochemical and ecosystem research

Model description

• Modular Ocean Model version 3 (MOM3) developed at GFDL/NOAA

• 3D primitive eq. in spherical coordinates under Boussinesq and hydrostatic approximation

• 75°S to 75°N, 54 vertical level, etopo2• K-profile parameterization(Large et al. 1994)• CFC- concerned

Model runs and outputs

• 50-year climatological runs applied NCEP/NCAR reanalysis mean from 1950-1998.

• After spin-up, the model is driven by daily mean wind stresses obtain from NCEP/NCAR reanalysis for a period from 1950-2008.

Analyses of physical aspects using OFES result

Zonally coherent zonal current structures

Frontal structure in the Kuroshio/Oyashio Extension

Decadal variations in North Pacific Ocean

Dynamics of recirculation gyre in the Kuroshio extension region

Responses of surfacecurrents to the winds near Hawaiian

islands.

Decadal variations in SSH in the South Pacific Ocean

Heat budget in the upper mixed-layer in the southeastern Indian Ocean.

Effects of eddy variability on the circulation in the northwestern Atlantic Ocean

Structure of cyclonic eddy in the Antarctic Divergence off Adelie Coast

Deep mixed-layer depth in formation regions of subantarctic mode water in the southern ocean

Simulated CFC-11 distributionin the Weddell Sea