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Characteristics of Precipitation over the East Coast of Korea Based on the Special Observation during the Winter Season of 2012

2012년 특별관측 자료를 이용한 동해안 겨울철 강수 특성 분석

  • Received : 2013.12.23
  • Accepted : 2014.02.05
  • Published : 2014.02.28

Abstract

The special observation using Radiosonde was performed to investigate precipitation events over the east coast of Korea during the winter season from 5 January to 29 February 2012. This analysis focused on the various indices to describe the characteristics of the atmospheric instability. Equivalent Potential Temperature (EPT) from surface (1000 hPa) to middle level (near 750 hPa) was increased when the precipitation occurred and these levels (1000~750 hPa) had moisture enough to cause the instability of atmosphere. The temporal evolution of Convective Available Potential Energy (CAPE) appeared to be enhanced when the precipitation fell. Similar behavior was also observed for the temporal evolution of Storm Relative Helicity (SRH), indicating that it had a higher value during the precipitation events. To understand a detailed structure of atmospheric condition for the formation of precipitation, the surface remote sensing data and Automatic Weather System (AWS) data were analyzed. We calculated the Total Precipitable Water FLUX (TPWFLUX) using TPW and wind vector. TPWFLUX and precipitation amount showed a statistically significant relationship in the north easterly winds. The result suggested that understanding of the dynamical processes such as wind direction be important to comprehend precipitation phenomenon in the east coast of Korea.

Keywords

rainfall events;snowfall events;special observation;unstability;tpwflux

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Cited by

  1. Quality Evaluation of Wind Vectors from UHF Wind Profiler using Radiosonde Measurements vol.24, pp.1, 2015, https://doi.org/10.5322/JESI.2015.24.1.133
  2. A Case Study on the Impact of Ground-based Glaciogenic Seeding on Winter Orographic Clouds at Daegwallyeong vol.36, pp.4, 2015, https://doi.org/10.5467/JKESS.2015.36.4.301
  3. Interannual variability of winter precipitation linked to upper ocean heat content off the east coast of Korea pp.08998418, 2017, https://doi.org/10.1002/joc.5354
  4. Case Study of Ground-Based Glaciogenic Seeding of Clouds over the Pyeongchang Region vol.2018, pp.1687-9317, 2018, https://doi.org/10.1155/2018/9465923

Acknowledgement

Supported by : 국립기상연구소