The Sea, Journal of the Korean Society of Oceanography    Vol.9   No.3   pp.111-118  . Year.2004  
Observations on the Coastal Ocean Response to Typhoon Maemi at the East Sea Real-time Ocean Buoy

Sung Hyun Nam, Jae Yul Yun, Kuh Kim

OCEAN Laboratory/RIO, School of Earth and Environmental Sciences, Seoul National University
An ocean buoy was deployed 10 km off Donghae city, Korea at a depth of 130 m to measure meteorological (air pressure, air temperature, wind speed, wind gust, wind direction, relative humidity) and oceanographic data (water properties and currents in the whole column) in real-time. The buoy recorded a maximum wind gust of 25 m/s (10 minutes'average speed of 20 m/s) and a minimum air pressure of 980 hPa when the eye of typhoon Maemi passed by near the Uljin city, Korea at 03:00 on 13 September 2003. The wave height reached maximum of 9 m with the significant wave height of 4 m at 04:00 (1 hour after the passage of Maemi). The currents measured near the surface reached up to about 100 cm/s at 13:00 (10 hours after the passage of Maemi). The mixed layer (high temperature and low salinity) thickness, which was accompanied by strong southward current, gradually increased from 20 m to 40 m during the 10 hours. A simple two layer model for the response to an impulsive alongshore wind over an uniformly sloping bottom developed by Csanady (1984) showed reasonable estimates of alongshore and offshore currents and interface displacement for the condition of typhoon Maemi at the buoy position (x=8.15 km) during the 10 hours.

[Keyword] Typhoon, Maemi, Buoy, Two Layer Model, Response To Impulsive Alongshore Wind, Uniformly Sloping Bottom

[Fig, Table]

[Reference]
파랑-해양순환 접합모델을 이용한 폭풍해일 에 대한 파랑과 조석의 영향 연구
  - 문일주, 오임상
  - 한국기상학회지    36(5)   563-574 p   Year.2003
Observations of the response of thermocline currents to a Hurricane
  - Brink, K.H.
  - J. Phys. Oceanogr.    19   1017-1022 p   Year.1989
Circulation in the coastal ocean
  - Csanady, G.T.
  - D. Reidel publishing company      0-0 p   Year.1984
A three-dimensional numerical study of effects of Typhoon on oceanographic conditions in the Korea Strait
  - Hong, C.H.
  - J. Kor. Soc. Oceanogr.    34   73-85 p   Year.1999
The upper ocean response to North Atlantic Hurricanes and tropical storms, 1997-2001
  - Kwon, Y.O. and S.C. Riser
  - J. Geophys. Res.      0-0 p   Year.2003
Ocean response to Typhoon Rusa in the south sea of Korea and in the East China Sea
  - Lee, D.K. and P. Niler
  - J. Kor. Soc. Oceanogr.    38   60-67 p   Year.2003
Development of ESROB (East Sea Real-time Ocean Buoy)
  - Nam, S.H., K.W. Kim, H.R. Kim, C.B. Cho, S.J. Lyu, Y.G. Kim, K. Kim
  - PICES (North Pacific Marine Science Organization) Scientific Report Series for the MONITOR workshop in 11th annual meeting      0-0 p   Year.2003
2-5 day band coastal ocean variability in winter of 1997-98 and 2000-01 off the Donghae city
  - Nam, S.H., K. Kim
  - Korea, Proc. Spring Meeting Kor. Soc. Oceanogr      0-0 p   Year.2002
Observation of temperature and velocity from a surface buoy moored in the Shikoku Basin (OMLET-88)-An oceanic response to Typhoon
  - Taira, K., S. Kitagawa, H. Otobe, T. Asai
  - J. Oceanogr.    49   397-406 p   Year.1993