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The northeastward current southeast of the Ryukyu Islands in late fall of 2000 estimated by an inverse technique
Author(s) -
Zhu XiaoHua,
Park JaeHun,
Kaneko Ikuo
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl022135
Subject(s) - geology , hydrography , current (fluid) , geodesy , inversion (geology) , seismology , climatology , oceanography , tectonics
The northeastward current (NC) southeast of the Ryukyu Islands is estimated using an inverse technique with hydrographic section data collected in December 2000. The inversion results show the NC flowing over the continental slope with a subsurface maximum velocity of 34 cm s −1 at 270‐dbar depth southeast of Okinawa and 67 cm s −1 at 400‐dbar depth east of Amami‐Ohshima. The NC volume transports are nearly equal at the two lines (∼15 Sv), and their vertical profiles exhibit similar subsurface maximum structure at both lines. These results strongly suggest that the NC off Amami‐Ohshima originates from the NC off Okinawa during our observation period.