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| Titel |
Explosively developing extratropical cyclone associated with the high wind-waves along the east coast of Korea |
| VerfasserIn |
Ki-Young Heo, Jin-Yong Choi, Kwang-Soon Park |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142276
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| Publikation (Nr.) |
 EGU/EGU2017-5877.pdf |
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| Zusammenfassung |
| An extreme extratropical cyclone struck the northern part of Korea on May 3, 2016 causing
significant damage to property on the land due to extreme winds and abnormal high waves in
coastal area. The meteorological composite fields for the cyclone show a strong surface wind
velocity (up to 45 m s−1) during its mature phase. This study investigated the development
mechanisms of an explosive cyclone through numerical simulation and sensitivity
experiments using the Advanced Research version of the Weather Research and Forecasting
(WRF-ARW) model. The trigger mechanism for the explosive cyclogenesis is the strong
baroclinic instability and temperature advection associated with upper-level cut-off
low and the interaction of potential vorticity (PV) anomalies between the lower-
and upper-level. The efficient placement of the high- and low-level jets forms a
favorable condition for its development and transportation of water vapor and the
instability energy into the cyclone. The sea-state wave simulation of large swell waves
along the eastern coast of the Korean Peninsula is obtained using the wave model
WAVEWATCHIII (WW3) forced by the 10-m above ground level wind field from the
WRF-ARW simulations. The simulation results of WW3 for the significant wave
height were compared against buoy observation data at 1-h intervals. The simulated
significant wave height systematically underestimated by 0.5 m. However, strong
wind field generated by the cyclone is clarified as key features determining the
characteristics of the high waves in terms of the temporal growth and decay patterns. |
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