Intrastorm Variability of the Inland and Orographic Enhancement of a Sea-Effect Snowstorm in the Hokuriku Region of Japan
Intrastorm Variability of the Inland and Orographic Enhancement of a Sea-Effect Snowstorm in the Hokuriku Region of Japan
复制标题
日本北陆地区海效暴风雪的内陆暴雨内变率和地形增强
DOI:
10.1175/mwr-d-19-0390.1
复制
发表时间:
2020
影响因子:
3.2
通讯作者:
Yamaguchi, Satoru
中科院分区:
文献类型:
--
作者:
Veals, Peter G.;Steenburgh, W. James;Nakai, Sento;Yamaguchi, Satoru
A prolonged period of winter monsoonal flow brought heavy sea-effect snowfall to the Hokuriku region along the west coast of the Japanese island of Honshu from 2 to 7 February 2010. Snowfall in some locations exceeded 140 cm, but the distribution within the event was highly variable. We examine the factors contributing to these variations using data from a Japan Meteorological Agency (JMA) C-band surveillance radar, JMA soundings, surface precipitation observations, and a Weather Research and Forecasting (WRF) Model simulation. There were three distinct periods during the event. Period 1 featured relatively weak flow with precipitation confined mainly to the coast and lowlands. Precipitation maxima were located where the flow ascended: 1) over terrain-blocked air, 2) at the foot of a high flow-normal barrier, or 3) relatively unimpeded over the lower mountain ranges. Flow strengthened during period 2, yielding stronger vertical velocities over the terrain with precipitation maxima shifting inland and to higher elevation. The flow strengthened further in period 3, with the precipitation maxima shifting higher in elevation and into the lee, with almost no precipitation falling in the lowlands. Thus, greater inland penetration and enhancement of precipitation occurred as the flow speed increased, but additional factors such as the subcloud sublimation of hydrometeors and the convective instability also contribute to differences between periods 2 and 3. These results illustrate the importance of incident flow strength in modulating the distribution and enhancement of snowfall in global lake- and sea-effect regions.
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DOI:
10.1029/2018jd029586
发表时间:
2019
期刊:
Journal of Geophysical Research: Atmospheres
影响因子:
--
作者:
West, Tyler K.;Steenburgh, W. James;Mace, Gerald G.
通讯作者:
Mace, Gerald G.
影响因子:
3.1
作者:
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影响因子:
8.9
作者:
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通讯作者:
U. Germann
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
W. J. Steenburgh
通讯作者:
W. J. Steenburgh
影响因子:
27.7
作者:
P. Baines
通讯作者:
P. Baines