We present for the first time the characteristics of upper atmospheric horizontal winds over the Korean Peninsula. Winds and their variability are derived using four-year measurements by the Korea Astronomy and Space Science Institute (KASI) meteor radar. A general characteristic of zonal and meridional winds is that they exhibit distinct diurnal and seasonal variations. Their changes indicate sometimes similar or sometimes different periodicities. Both winds are characterized by either semi-diurnal tides (12 hour period) and/or diurnal tides (24 hour period) from 80–100 km. In terms of annual change, the annual variation is the strongest component in both winds, but semi-annual and ter-annual variations are only detected in zonal winds.

1. INTRODUCTION
2. Observation of Horizontal Winds fro mMeteor radar
3. Charact eristics of Hourly HorizontalWinds
4. Charact eristics of Daily Horizontal Winds
5. Summary and Conclusions
ACKNOWLEDGMENTS
REFERENCES

• Hosik Kam(Division of Space Science, Korea Astronomy and Space Science Institute)
• Young-Sil Kwak(Division of Space Science, Korea Astronomy and Space Science Institute, Korea University of Science and Technology) Corresponding author
• Tae-Yong Yang(Division of Space Science, Korea Astronomy and Space Science Institute)
• Yong Ha Kim(Department of Astronomy, Space Science and Geology, Chungnam National University)
• Jeongheon Kim(Division of Space Science, Korea Astronomy and Space Science Institute)
• Jaewook Lee(Division of Space Science, Korea Astronomy and Space Science Institute, Korea University of Science and Technology)
• Seonghwan Choi(Division of Space Science, Korea Astronomy and Space Science Institute)
• Ji-Hye Baek(Division of Space Science, Korea Astronomy and Space Science Institute)