Analysis and model simulation of wind convergence over the Sea of Japan
In the winter, the wind system over the Sea of Japan strongly affects the weather of the Japan islands. In this paper, wind distributions over the Sea of Japan during cold-air outbreaks observed by the NASA scatterometer were analyzed. Strong northwesterly to westerly winds of 15 to 20 m/s were observed off Vladivostok and off the Korea Peninsula, respectively. A weak wind region, in which the wind speed is less than 9 m/s, is seen downwind of the mountains and extends more than 200 km. A strong wind convergence zone was formed in the further lee of the weak wind region. Numerical experiments using a three-dimensional mesoscale model are performed to compare the wind distribution observed by NSCAT. The results show that the simulated winds agree well with those observed by NSCAT except for the intensity of the convergence.
KeywordsNASA scatterometer ocean wind numerical experiment
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- Kang, S-D and Kimura, F., A numerical study on the mechanism of cloud-street formation in the lee of an isolated mountain near a coast, J. Meteor. Soc. Japan, 75(1997), 955–968.Google Scholar
- Kikuchi, Y., Arakawa, S., Kimura, F., Shirasaki, K., and Nagano, Y., Numerical Study on the effect of the land and sea breeze circulation in the Kanto District, J. Meteor. Soc. Japan, 59(1981), 723–738.Google Scholar
- Kimura, F. and Arakawa, S., A numerical experiment of the nocturnal low level jet over the Kanto plain, J. Meteor. Soc. Japan, 61(1983), 841–861.Google Scholar
- Nagata, M., Ikawa, M., Yoshizumi, S. and Yoshida, T., On the formation of a convergent cloud band over the Japan Sea in winter: numerical experiments, J. Meteor. Soc. Japan, 64(1986), 841–855.Google Scholar
- Nagata, M., Further numerical study on the formation of the convergent cloud band over the Japan Sea in winter, J. Meteor. Soc. Japan, 69(1991), 419–428.Google Scholar
- Okabayashi, T and Satomi, M., A study on the snowfall and its original clouds by the meteorological radar and satellite (In Japanese with English abstract), Tenki, 18(1971), 573–581.Google Scholar
- Saito, K., A numerical study of the local downslope wind ’Yamaji-Kase’ in Japan Part 2: Non-linear aspect of the 3-D flow over a mountain range with a col, J. Meteorl. Soc. Japan, 71(1993), 247–271.Google Scholar
- Yagi, S., Muramatsu, T., Uchiyama, T. and Kurokawa, N., Convergent band cloud and Cu-Cb line over Japan Sea affected by topographic feature in the coast of the Asian continent, Tenki, 33(1986), 175–187Google Scholar