scholarly journals Role of submonthly disturbance and 40-50 day ISO on the extreme rainfall event associated with Typhoon Morakot (2009) in Southern Taiwan

2010 ◽  
Vol 37 (8) ◽  
Author(s):  
Chi-Cherng Hong ◽  
Ming-Ying Lee ◽  
Huang-Hsiung Hsu ◽  
Jui-Ling Kuo
Keyword(s):  
Extreme Rainfall ◽  
Rainfall Event ◽  
Extreme Rainfall Event ◽  
Typhoon Morakot ◽  
Southern Taiwan

scholarly journals Numerical Simulations of the 2013 Alberta Flood: Dynamics, Thermodynamics, and the Role of Orography

2017 ◽  
Vol 145 (8) ◽  
pp. 3049-3072 ◽  
Author(s):  
Shawn M. Milrad ◽  
Kelly Lombardo ◽  
Eyad H. Atallah ◽  
John R. Gyakum
Keyword(s):  
Extreme Rainfall ◽  
Rainfall Event ◽  
Extreme Rainfall Event ◽  
Canadian History ◽  
Mesoscale Dynamics ◽  
Physical Mechanisms ◽  
Long Duration ◽  
Surface Cyclone ◽  
Flood Dynamics

The 19–21 June 2013 Alberta flood was the second costliest ($6 billion CAD) natural disaster in Canadian history, trailing only the 2016 Fort McMurray, Alberta, Canada, wildfires. One of the primary drivers was an extreme rainfall event that resulted in 75–150 mm of precipitation in the foothills west of Calgary, Canada. Here, the mesoscale dynamics and thermodynamics that contributed to the extreme rainfall event are elucidated through high-resolution numerical model simulations. In addition, terrain reduction model sensitivity experiments using Gaussian smoothing techniques quantify the importance of orography in producing the extreme rainfall event. It is suggested that the extreme rainfall event was initially characterized by the formation of a surface cyclone on the eastern side of the Canadian Rockies due to quasigeostrophic (QG) mechanisms. Orographic processes and diabatic heating feedbacks maintained the surface cyclone throughout the event, extending the duration of both easterly upslope flow and QG forcing for ascent in the flood region. The long-duration ascent and associated condensational heat release in the flood region vertically redistributed potential vorticity, anchoring and further extending the duration of the surface cyclone, upslope flow, and the rainfall. Although the magnitudes of ascent and precipitation were smaller in 10% and 25% reduced terrain simulations, only a terrain reduction of greater than 25% drastically altered the location and magnitude of the heaviest precipitation and the associated physical mechanisms.

scholarly journals Elucidating the role of vegetation in the initiation of rainfall-induced shallow landslides: Insights from an extreme rainfall event in the Colorado Front Range

2016 ◽  
Vol 43 (17) ◽  
pp. 9084-9092 ◽  
Author(s):  
Luke A. McGuire ◽  
Francis K. Rengers ◽  
Jason W. Kean ◽  
Jeffrey A. Coe ◽  
Benjamin B. Mirus ◽  
...  
Keyword(s):  
Extreme Rainfall ◽  
Shallow Landslides ◽  
Rainfall Event ◽  
Colorado Front Range ◽  
Extreme Rainfall Event ◽  
Front Range
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