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Fig. 1. (a) Surface weather map near Kangnung city (K) at 09:00 LST December 7
(a high pressure in north and a low in south of Korean peninsula; beginning time of
snowfall) and (b) 9, 2002 (a high in west and a low in east; ending time).
a low-pressure system in the south (below Kyusu, Japan) on the weather
map in the north eastern Asia influenced the whole Korean peninsula.
Under such pressure system, north-easterly wind and easterly wind pre-
vailed near the Kangnung city (here, K) in the eastern mountainous coastal
region (Fig. 1).
In Fig. 2, easterly wind near Kangnung city (K) could induce a great
amount of moisture from the East Sea toward Kangnung city and then the
induced moisture further went to the top of mountain, called Taegulyung
of 868 m height (T). 9 - 11 From vertical profiles of wind, air temperature and
relative humidity in Fig. 3, the moisture driven by easterly wind should be
cooled down during its uprising toward the mountain top and saturated.
The saturated water vapors formed a great stratocumulus cloud near the
right-hand side of the mountain top under the influence of westerly wind
in the upwind side confronting an easterly upslope wind along the eastern
slope of the mountain.
The base of the cloud existed near the eastern top of Mt. Taegulyung
at about 600 m and extending to 1.9 km height and spreading toward the
sea near the upper level of 1 km at 12:00 LST and 18:00 LST, December 7,
2002. Thus, Gangwon Regional Meteorological Administration (GRMA)
located in Kangnung city reported the event of snowfall measured at Taeg-
ulyung Meteorological Oce near the top of the mountain at 12:00 LST,
December 7, and six hours later, at 18:00 LST, Kangnung city in the east-
ern basin near the coast had snowfall under the extension of 100% relative
humidity area over the ground of the city (Fig. 3).
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