TY - JOUR
T1 - Wind-driven intensification of the Tsushima Warm Current along the Japanese coast detected by sea level difference in the summer monsoon of 2013
AU - Takikawa, Tetsutaro
AU - Watanabe, Toshiteru
AU - Senjyu, Tomoharu
AU - Morimoto, Akihiko
N1 - Funding Information:
We sincerely thank the captain and crew of training vessel Tenyo-maru of the National Fisheries University for deployment of ADCPs, and Fisheries Cooperative Association of Utsu, Yamaguchi Prefecture Sea Farming Public Corporation of Nagato, Hagi Shipping Co., Ltd. for the sea level observations of Omijima and Mishima Islands. This work was supported in part by the Collaborative Research Program of RIAM, Kyushu University. We express our sincerest thanks to Professor Naoki Hirose of RIAM, Kyushu University for his helpful comments and support. We also wish to thank JODC, IPSC, JMA, and NOAA's NCDC for providing the data, and Mr. Michiyoshi Ishibashi and Mr. Kei Yufu of RIAM, Kyushu University, and Dr. Noriyuki Okei of the Ishikawa Prefecture Fisheries Research Center, Japan for technical support and maintenance of Hegura's tidal station. This work was partly supported by JSPS KAKENHI Grant Number JP25247076. Two anonymous reviewers provided comments that helped improve the manuscript.
Funding Information:
We sincerely thank the captain and crew of training vessel Tenyo-maru of the National Fisheries University for deployment of ADCPs, and Fisheries Cooperative Association of Utsu, Yamaguchi Prefecture Sea Farming Public Corporation of Nagato, Hagi Shipping Co., Ltd. for the sea level observations of Omijima and Mishima Islands. This work was supported in part by the Collaborative Research Program of RIAM, Kyushu University. We express our sincerest thanks to Professor Naoki Hirose of RIAM, Kyushu University for his helpful comments and support. We also wish to thank JODC, IPSC, JMA, and NOAA’s NCDC for providing the data, and Mr. Michiyoshi Ishibashi and Mr. Kei Yufu of RIAM, Kyushu University, and Dr. Noriyuki Okei of the Ishikawa Prefecture Fisheries Research Center, Japan for technical support and maintenance of Hegura's tidal station. This work was partly supported by JSPS KAKENHI Grant Number JP25247076 . Two anonymous reviewers provided comments that helped improve the manuscript.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/7/1
Y1 - 2017/7/1
N2 - This study found an unusually large variation in the coastal sea level difference (SLD) in the southwestern Japan Sea from July to October 2013. The time and horizontal scales were about 4 months and 1000 km along the coast, respectively. During the exceptionally hot summer of 2013, strong monsoon winds blew through the Tsushima Straits into the southwestern Japan Sea, because the North Pacific High was located farther west than average. The southwesterly winds averaged 7 m s−1 parallel to the coast in July 2013, resulting in Ekman transport toward the coast. The most noticeable SLD was measured between Omijima and Mishima, normal to the 250 km rectilinear coastal line. The velocity of the first branch of the Tsushima Warm Current increased to about 50 cm s−1 between Omijima and Mishima from late July to early August. Although the SLD seemed to simultaneously increase and decrease along the Japanese coast with large time scale, the variation in coastal SLD propagated along the Japanese coast, reaching Niigata-nishi in the eastern Japan Sea. The propagation speed in the wide continental shelf of the southern Japan Sea was much higher than that in the narrow eastern shelf, which was consistent with the behavior of continental shelf waves.
AB - This study found an unusually large variation in the coastal sea level difference (SLD) in the southwestern Japan Sea from July to October 2013. The time and horizontal scales were about 4 months and 1000 km along the coast, respectively. During the exceptionally hot summer of 2013, strong monsoon winds blew through the Tsushima Straits into the southwestern Japan Sea, because the North Pacific High was located farther west than average. The southwesterly winds averaged 7 m s−1 parallel to the coast in July 2013, resulting in Ekman transport toward the coast. The most noticeable SLD was measured between Omijima and Mishima, normal to the 250 km rectilinear coastal line. The velocity of the first branch of the Tsushima Warm Current increased to about 50 cm s−1 between Omijima and Mishima from late July to early August. Although the SLD seemed to simultaneously increase and decrease along the Japanese coast with large time scale, the variation in coastal SLD propagated along the Japanese coast, reaching Niigata-nishi in the eastern Japan Sea. The propagation speed in the wide continental shelf of the southern Japan Sea was much higher than that in the narrow eastern shelf, which was consistent with the behavior of continental shelf waves.
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U2 - 10.1016/j.csr.2016.06.004
DO - 10.1016/j.csr.2016.06.004
M3 - Article
AN - SCOPUS:84977602652
SN - 0278-4343
VL - 143
SP - 271
EP - 277
JO - Continental Shelf Research
JF - Continental Shelf Research
ER -