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contributor authorKusunoki, Kenichi
contributor authorMurakami, Masataka
contributor authorOrikasa, Narihiro
contributor authorHoshimoto, Mizuho
contributor authorTanaka, Yoshinobu
contributor authorYamada, Yoshinori
contributor authorMizuno, Hakaru
contributor authorHamazu, Kyosuke
contributor authorWatanabe, Hideyuki
date accessioned2017-06-09T17:26:45Z
date available2017-06-09T17:26:45Z
date copyright2005/04/01
date issued2005
identifier issn0027-0644
identifier otherams-85422.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4228868
description abstractOn 25 February 1999, due to a winter monsoon after a cyclonic storm, orographic snow clouds formed under conditions of weak cold advection on the western side of the central mountain range of Japan. In this study, the Ka-band Doppler radar and vehicle-mounted microwave radiometer and 2D-Grey imaging probe were used to obtain unique datasets for analyzing the spatial distributions of microphysical structures of the snow clouds at the windward slope. The liquid water path, number concentration of snow particles (0.1?6.4 mm diameter), and precipitation rate were found to be correlated with altitude. The greater concentration of larger particles tended to appear up the slope. The echo top was at about 2.5 km (?30 dBZ), and the relatively strong echo region (>?3 dBZ) appeared at 5 km up the slope and extended nearly parallel to the slope. According to the echo pattern, the ice water path increased with terrain height and reached the maximum intensity at about 14 km up the slope. These observations provide indirect evidence that terrain-induced updrafts lead to the generation and growth of supercooled cloud droplets and indicate that the riming process plays an important role in the growth of snow particles at higher altitudes. In this paper, it is confirmed that the abundance of supercooled liquid water (SLW) during intensified monsoon flow is due to larger water production rates caused by higher vertical velocities induced by topography. Furthermore, it can be shown that small-scale terrains enhance localized updrafts embedded within the larger-scale flow and have noticeable impact on SLW cloud distribution.
publisherAmerican Meteorological Society
titleObservations of Quasi-Stationary and Shallow Orographic Snow Clouds: Spatial Distributions of Supercooled Liquid Water and Snow Particles
typeJournal Paper
journal volume133
journal issue4
journal titleMonthly Weather Review
identifier doi10.1175/MWR2874.1
journal fristpage743
journal lastpage751
treeMonthly Weather Review:;2005:;volume( 133 ):;issue: 004
contenttypeFulltext


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