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Topographical effect of the Antarctic Peninsula on a strong wind event

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Topographical effect of the Antarctic Peninsula on a strong wind event
Other Titles
남극반도 지형이 세종기지 강풍에 미치는 영향 연구
Kwon, Hataek
Kim, Seong-Joong
Kim, Sang-Woo
Kim, Sinu
Environmental Sciences & EcologyPhysical GeographyGeology
downslope windstormKing Sejong Stationpolar WRFtopography
Issue Date
Kwon, Hataek, et al. 2021. "Topographical effect of the Antarctic Peninsula on a strong wind event". ANTARCTIC SCIENCE, 33(6): 674-684.
The topographical effect on a strong wind event that occurred on 7 January 2013 at King Sejong Station (KSJ), Antarctica, was investigated using the Polar Weather Research and Forecasting (WRF) model. Numerical experiments applying three different terrain heights of the Antarctic Peninsula (AP) were performed to quantitatively estimate the topographical effect on the selected strong wind event. The experiment employing original AP topography successfully represented the observed features in the strong wind event, both in terms of peak wind speed (by similar to 94%; similar to 19.7 m/s) and abrupt transitions of wind speed. In contrast, the experiment with a flattened terrain height significantly underestimated the peak wind speeds (by similar to 51%; similar to 10.4 m/s) of the observations. An absence of AP topography failed to simulate both a strong discontinuity of sea-level pressure fields around the east coast of the AP and a strong south-easterly wind over the AP. As a result, the observed downslope windstorm, driven by a flow overriding a barrier, was not formed at the western side of the AP, resulting in no further enhancement of the wind at KSJ. This result demonstrates that the topography of the AP played a critical role in driving the strong wind event at KSJ on 7 January 2013, accounting for similar to 50% of the total wind speed.
King Sejong Station
Appears in Collections  
2021-2021, Understanding of Antarctic climate and environment and assessments of global influence (21-21) / Kim, Seong-Joong (PE21030)
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