Numerical Simulations of the Impacts of Land-Cover Change on Cold Fronts in South-West Western Australia

被引：20
|
作者：
Kala, J. [1 ]
Lyons, T. J. [1 ,3 ]
Nair, U. S. [2 ,3 ]
机构：
[1] Murdoch Univ, Sch Environm Sci, Murdoch, WA 6150, Australia
[2] Univ Alabama, Ctr Earth Syst Sci, Natl Space Sci & Technol Ctr, Huntsville, AL 35806 USA
[3] Ctr Excellence Climate Change Woodland & Forest H, Murdoch, WA 6150, Australia
来源：
BOUNDARY-LAYER METEOROLOGY | 2011年 / 138卷 / 01期
基金：
澳大利亚研究理事会; 美国国家科学基金会;
关键词：
Cold fronts; Land-atmosphere interactions; Land-cover change; Regional Atmospheric Modeling System; CLOUD MICROPHYSICS PARAMETERIZATION; OCEAN CLIMATE VARIABILITY; WINTER RAINFALL; SOUTHWESTERN AUSTRALIA; SYDNEY BASIN; AIR-FLOW; IN-SITU; RAMS; VEGETATION; PRECIPITATION;
D O I：
10.1007/s10546-010-9547-3
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The south-west of Western Australia has experienced significant land-cover change as well as a decline in rainfall. Given that most precipitation in the region results from frontal passages, the impact of land-cover change on the dynamics of cold fronts is explored using the Regional Atmospheric Modeling System version 6.0. Frontal simulations are evaluated against high resolution atmospheric soundings, station observations, and gridded rainfall analyses and shown to reproduce the qualitative features of cold fronts. Land-cover change results in a decrease in total frontal precipitation through a decrease in boundary-layer turbulent kinetic energy and vertically integrated moisture convergence, and an increase in wind speed within the lower boundary layer. Such processes contribute to reduced convective rainfall under current vegetation cover.
引用
收藏
页码：121 / 138
页数：18
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