TY - JOUR
T1 - Vertical Viscosity Coefficient Increased for High-Resolution Modeling of the Tsushima/Korea Strait
AU - Hirose, Naoki
AU - Liu, Tianran
AU - Takayama, Katsumi
AU - Uehara, Katsuto
AU - Taneda, Takeshi
AU - Kim, Young Ho
N1 - Funding Information:
Acknowledgments. All model calculations were performed using NEC’s SX-ACE vector supercomputers at Kyushu University and Tohoku University. Several figures were made by using Grid Analysis and Display System (GrADS). The authors thank Dr. Menemenlis for suggesting the keyword ‘‘recycle’’ for the present approximation of Green’s functions. In-situ CTD data in the southeastern area were obtained by the project for Marine fisheries stock assessment and evaluation for Japanese waters of the Fisheries Agency of Japan. We are also grateful to Korea Ocean Data Center, National Institute of Fisheries Science for providing serial CTD data in the north-western area. The raw sounding data for detailed bathymetry are appreciated to Japan Oceanographic Data Center, Japan Agency for Marine-Earth Science and Technology, and National Oceanic and Atmospheric Administration. This work was mainly supported by Grant-in-Aid for Scientific Research (16H02226), and by Research and Technological Guidance Division, Fisheries Agency of Japan. This study was also supported by research program on development of innovative technology grants from the Project of Bio-oriented Technology Research Advancement Institution.
Publisher Copyright:
© 2021 American Meteorological Society.
PY - 2021/6
Y1 - 2021/6
N2 - This study clarifies the necessity of an extraordinary large coefficient of vertical viscosity for dynamical ocean modeling in a shallow and narrow strait with complex bathymetry. Sensitivity experiments and objective analyses imply that background momentum viscosity is on the order of 100 cm2 s21, while tracer diffusivity estimates are on the order of 0.1 cm2 s21 . The physical interpretation of these estimates is also discussed in the last part of this paper. To obtain reliable solutions, this study introduces cyclic application of the dynamical response to each parameter to minimize the number of long-term sensitivity experiments. The recycling Green’s function method yields weaker bottom friction and enhanced latent heat flux simultaneously with the increased viscosity in high-resolution modeling of the Tsushima/Korea Strait.
AB - This study clarifies the necessity of an extraordinary large coefficient of vertical viscosity for dynamical ocean modeling in a shallow and narrow strait with complex bathymetry. Sensitivity experiments and objective analyses imply that background momentum viscosity is on the order of 100 cm2 s21, while tracer diffusivity estimates are on the order of 0.1 cm2 s21 . The physical interpretation of these estimates is also discussed in the last part of this paper. To obtain reliable solutions, this study introduces cyclic application of the dynamical response to each parameter to minimize the number of long-term sensitivity experiments. The recycling Green’s function method yields weaker bottom friction and enhanced latent heat flux simultaneously with the increased viscosity in high-resolution modeling of the Tsushima/Korea Strait.
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U2 - 10.1175/JTECH-D-20-0156.1
DO - 10.1175/JTECH-D-20-0156.1
M3 - Article
AN - SCOPUS:85126462723
SN - 0739-0572
VL - 38
SP - 1205
EP - 1215
JO - Journal of Atmospheric and Oceanic Technology
JF - Journal of Atmospheric and Oceanic Technology
IS - 6
ER -