An Analysis of Low-level Stability in the Heavy Snowfall Event Observed in the Yeongdong Region

Lee, Jinhwa; Eun, Seung-Hee; Kim, Byung-Gon; Han, Sang-Ok

doi:10.14191/atmos.2012.22.2.209

Cited by 14 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their results suggest the warm SST anomalies in the East Sea result in heavy snowfall as the lower part of the air mass becomes warmer, which increases thermal instability, and moisture. The role of low-level instability by cold air outbreak and warm ocean in heavy snowfall were also highlighted by Lee et al (2012). The strong surface heat fluxes produced by the East Sea are also known to be an important contributor to heavy snowfall in this region (Lee et al, 2018).…”

Section: Air-sea Interactionmentioning

confidence: 99%

“…CC BY 4.0 License. orography), 3) thermodynamic instability in a low level over the East Sea cause the snow by air-mass transformation, resulting from cold and dry air brought by a cold-air outbreak over the warm ocean (Lee et al, 2012;Lee and Xue, 2013;Nam et al, 2014), 4) updraft occurs in the steep orographic ascent region (or coastal area due to orographic blocking or damming) by an orographic effect in unblocked condition, leading to production of supercooled liquid water and growth by riming (Medina and Houze Jr, 2003;Rotunno and Houze, 2007), and 5) both aggregation and riming processes are facilitated by a turbulent cell in a directional shear layer (Houze and Medina, 2005).…”

Section: Warm Lowmentioning

confidence: 99%

See 1 more Smart Citation

Impact of wind pattern and complex topography on snow microphysics during ICE-POP 2018

Kim¹,

Bang²,

Chang³

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Snowfall in north-eastern part of South Korea is the result of complex snowfall mechanisms due to a highly-contrasting terrain combined with nearby warm waters and three synoptic pressure patterns. All these factors together create unique combinations, whose disentangling can provide new insights into the microphysics of snow in the planet. This study focuses on the impact of wind flow and topography on the microphysics drawing of twenty snowfall events during the ICE-POP 2018 (International Collaborative Experiment for Pyeongchang 2018 Olympic and Paralympic winter games) field campaign in the Gangwon region. The vertical structure of precipitation and size distribution characteristics are investigated with collocated MRR (Micro Rain Radar) and PARSIVEL (PARticle SIze VELocity) disdrometers installed across the mountain range. The results indicate that wind shear and embedded turbulence were the cause of the riming process dominating the mountainous region. As the strength of these processes weaken from the mountainous region to the coastal region, riming became less significant and gave way to aggregation. This study specifically analyzes the microphysical characteristics under three major synoptic patterns: air-sea interaction, cold low, and warm low. Air–sea interaction pattern is characterized by more frequent snowfall and vertically deeper precipitation systems in the windward side, resulting in significant aggregation in the coastal region, with riming featuring as a primary growth mechanism in both mountainous and coastal regions. The cold low pattern is characterized by a higher snowfall rate and vertically deep systems in mountainous region, with the precipitation system becoming shallower in the coastal region and strong turbulence being found in the layer below 2 km in the mountainous upstream region (linked with dominant aggregation). The warm low pattern features the deepest system: precipitation here is enhanced by the seeder–feeder mechanism with two different precipitation systems divided by the transition zone (easterly below and westerly above). Overall, it is found that strong shear and turbulence in the transition zone is a likely reason for the dominant riming process in mountainous region, with aggregation being important in both mountainous and coastal regions.

show abstract

Section: Air-sea Interactionmentioning

confidence: 99%

Section: Warm Lowmentioning

confidence: 99%

Impact of wind pattern and complex topography on snow microphysics during ICE-POP 2018

Kim¹,

Bang²,

Chang³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Further we examined cloudlayer impacts on temperature and humidity differences for the analysis of both sensors' performance among various weather conditions, and also compared daytime and nighttime profiles to understand temporal dependence of meteorological sensors. The overall results showed that there are small but consistent biases in both temperature and humidity between different manufactured sensors, which could eventually secure reliable precisions of both sensors, irrespec- (Durre et al, 2006;Lee et al, 2012;Nam et al, 2014;Seo et al, 2015). 이와 같이 라디오존데는 기상연구에 있어서 기초적인 자료로써 중요한 부분을 차지하고 있지만, 같은 지점에서 관측 하는 라디오존데 일지라도 라디오존데 센서가 변경되 면 입력자료가 변경되어 다양한 모델의 결과에 오차 를 유발할 수 있다 (Eskridge et al, 2003).…”

Section: )unclassified

Intercomparison between Temperature and Humidity Sensors of Radiosonde by Different Manufacturers in the ESSAY (Experiment on Snow Storms At Yeongdong) Campaign

wonseok¹,

Eun²,

Kim³

et al. 2016

Atmosphere

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been suggested that heavy snowfall is linked to enhanced temperature difference (Δ T ) between 850 hPa and SST since convective clouds develop well over the sea with high ΔT (colder atmosphere over warmer sea) (Cho and Kwon, ; Lee et al, ; Nam et al, ; Song et al, ). When the northerly or the northwesterly sea surface wind (SSW) blows from the Eurasian continent, dense condensation on the mountainous landmass and the resultant precipitation by cumulus convection of humid air mass delivered from the ES can trigger heavy snowfall in the ES side of Japan.…”

Section: Introductionmentioning

confidence: 99%

Interannual variability of winter precipitation linked to upper ocean heat content off the east coast of Korea

Park

Nam

2017

Intl Journal of Climatology

View full text Add to dashboard Cite

We present a link between highly variable winter precipitation (e.g. occasional heavy snow) in the mountainous cities along the east coast of Korea and upper ocean heat content (OHC) in the western part of the East Sea (Japan Sea). After removing annual climatological cycle, OHC (as well as sea surface temperature, SST) variability coherent with the winter sea surface wind (SSW) is extracted using maximum covariance analysis (MCA). The first‐mode MCA pattern, explaining 68% of the total covariance, indicates that the stronger westerly (easterly) winter SSW links to larger (smaller) OHC in the upper 400 m or higher (lower) SST of the western part of the sea. Time series of the first‐mode MCA are comparable to winter precipitation variability at three local cities along the coast (Gangneung, Donghae, and Uljin) with significantly high correlation coefficients (0.84, 0.68, and 0.56, respectively). The links between OHC and SSW and between SSW and precipitation are discussed because zonal contrast of OHC drives zonal tilt of northerly monsoonal wind in winter by canonical turbulent momentum exchange within the marine planetary boundary layer (MPBL). The momentum exchange within the MPBL yields the interannual variability of SSW and thus, winter precipitation in the coastal cities.

show abstract

An Analysis of Low-level Stability in the Heavy Snowfall Event Observed in the Yeongdong Region

Cited by 14 publications

References 1 publication

Impact of wind pattern and complex topography on snow microphysics during ICE-POP 2018

Impact of wind pattern and complex topography on snow microphysics during ICE-POP 2018

Intercomparison between Temperature and Humidity Sensors of Radiosonde by Different Manufacturers in the ESSAY (Experiment on Snow Storms At Yeongdong) Campaign

Interannual variability of winter precipitation linked to upper ocean heat content off the east coast of Korea

Contact Info

Product

Resources

About