Arid
DOI10.1006/jare.1999.0608
The influence of subtropical cold fronts on the surface energy balance of a semi-arid site
Beringer, J; Tapper, NJ
通讯作者Beringer, J
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
出版年2000
卷号44期号:4页码:437-450
英文摘要

The passage of subtropical cold fronts through central Australia produces the only significant mesoscale meteorological features in the region. The interaction of these cold fronts with the surface energy balance strongly affects the local weather and climate. The surface energy balance was measured at a semi-arid site in Alice Springs, central Australia, to determine how it was influenced by the passage of subtropical cold fronts. Both Bowen ratio and eddy correlation methods were used. The daytime energy balance of the site showed high net radiation that was partitioned into 75% sensible heat flux and 25% soil heat flux with little or no latent heat flux. At night there was a large net radiative loss that was balanced primarily by a loss of heat from the soil. The cold fronts predominately passed through Alice Springs at night and showed a strong surface signature. The fronts brought moister air resulting in higher water vapour pressures during their passage. The nocturnal boundary layer was often disturbed as the front passed, resulting in warm, moist air being mixed down toward the land surface. Mixing decreased the soil heat flux and increased latent heat fluxes toward the surface. Moisture that accumulated at the surface at these times was often evaporated after a return to drier conditions. During the daytime, surface signatures in soil and sensible heat fluxes were less distinct due to the strong convective mixing. Latent heat fluxes followed a similar trend to the nocturnal case. (C) 2000 Academic Press.


英文关键词surface energy exchange climate dynamics subtropical cold fronts boundary layer central Australia Alice Springs semi-arid regions
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000087113100006
WOS关键词LOWER ATMOSPHERE ; MORNING GLORY ; DESERT ; FLUXES ; WAVES
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/139247
作者单位(1)Monash Univ, Dept Geog & Environm Sci, Melbourne, Vic 3004, Australia
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GB/T 7714
Beringer, J,Tapper, NJ. The influence of subtropical cold fronts on the surface energy balance of a semi-arid site[J],2000,44(4):437-450.
APA Beringer, J,&Tapper, NJ.(2000).The influence of subtropical cold fronts on the surface energy balance of a semi-arid site.JOURNAL OF ARID ENVIRONMENTS,44(4),437-450.
MLA Beringer, J,et al."The influence of subtropical cold fronts on the surface energy balance of a semi-arid site".JOURNAL OF ARID ENVIRONMENTS 44.4(2000):437-450.
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