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Satellite Image Analysis of Low-Level Stratiform Cloud Related with the Heavy Snowfall Events in the Yeongdong Region
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  • Journal title : Atmosphere
  • Volume 25, Issue 4,  2015, pp.577-589
  • Publisher : Korean Meteorological Society
  • DOI : 10.14191/Atmos.2015.25.4.577
 Title & Authors
Satellite Image Analysis of Low-Level Stratiform Cloud Related with the Heavy Snowfall Events in the Yeongdong Region
Kwon, Tae-Yong; Park, Jun-Young; Choi, Byoung-Cheol; Han, Sang-Ok;
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 Abstract
An unusual long-period and heavy snowfall occurred in the Yeongdong region from 6 to 14 February 2014. This event produced snowfall total of 194.8 cm and the recordbreaking 9-day snowfall duration in the 103-year local record at Gangneung. In this study, satellite-derived cloud-top brightness temperatures from the infrared channel in the atmospheric window () are examined to find out the characteristics of clouds related with this heavy snowfall event. The analysis results reveal that a majority of precipitation is related with the low-level stratiform clouds whose cloud-top brightness temperatures are distributed from -15 to and their standard deviations over the analysis domain (, 37 satellite pixels) are less than . It is also found that in the above temperature range precipitation intensity tends to increase with colder temperature. When the temperatures are warmer than , there is no precipitation or light precipitation. Furthermore this relation is confirmed from the examination of some other heavy snowfall events and light precipitation events which are related with the low-level stratiform clouds. This precipitation-brightness temperature relation may be explained by the combined effect of ice crystal growth processes: the maximum in dendritic ice-crystal growth occurs at about and the activation of ice nuclei begins below temperatures from approximately -7 to , depending on the composition of the ice nuclei.
 Keywords
Yeongdong region;heavy snowfall;low-level stratiform cloud;cloud-top brightness temperature;
 Language
Korean
 Cited by
1.
영동 대설사례의 레이더 강설강도 추정 관계식에 관한 연구,정승필;권태영;박준영;최병철;

대기, 2016. vol.26. 4, pp.509-522 crossref(new window)
1.
A Study on the Radar Reflectivity-Snowfall Rate Relation for Yeongdong Heavy Snowfall Events, Atmosphere, 2016, 26, 4, 509  crossref(new windwow)
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