TY - JOUR

T1 - Least-squares estimation of bottom topography using horizontal velocity measurements in the Tsushima/Korea Straits

AU - Hirose, Naoki

N1 - Funding Information:
constructive comments. The study is encouraged by Supporting Young Researchers with Fixed-term Appointments of Special Coordination Funds for Promoting Science and Technology and by the Category Seven of MEXT RR2002 Project for Sustainable Coexistence of Human, Nature and the Earth.

PY - 2005/8

Y1 - 2005/8

N2 - Several bathymetric data sets are compared and assessed with constraints of an ocean current model and velocity observations. The root-mean-square (rms) differences among the data sets reach 20 m in the shallow Tsushima/Korea Straits. The numerical experiments to simulate the Tsushima Warm Current are performed using four different topography data sets. The JTOPO1 data (MIRC, 2003) give the smallest rms difference to long-term horizontal velocity observations. Several least-squares combinations of the topography data sets are then sought to minimize the rms difference between the observed and modeled barotropic velocities. Most of the data sets reveal a large bias of 30-60 m at the Western Channel compared to independent sounding depths.

AB - Several bathymetric data sets are compared and assessed with constraints of an ocean current model and velocity observations. The root-mean-square (rms) differences among the data sets reach 20 m in the shallow Tsushima/Korea Straits. The numerical experiments to simulate the Tsushima Warm Current are performed using four different topography data sets. The JTOPO1 data (MIRC, 2003) give the smallest rms difference to long-term horizontal velocity observations. Several least-squares combinations of the topography data sets are then sought to minimize the rms difference between the observed and modeled barotropic velocities. Most of the data sets reveal a large bias of 30-60 m at the Western Channel compared to independent sounding depths.

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U2 - 10.1007/s10872-005-0085-4

DO - 10.1007/s10872-005-0085-4

M3 - Article

AN - SCOPUS:24344491494

SN - 0916-8370

VL - 61

SP - 789

EP - 794

JO - Journal of Oceanography

JF - Journal of Oceanography

IS - 4

ER -