Arid
DOI10.1016/j.atmosenv.2010.09.049
Toward understanding the behavior of carbon dioxide and surface energy fluxes in the urbanized semi-arid Salt Lake Valley, Utah, USA
Ramamurthy, Prathap; Pardyjak, Eric R.
通讯作者Pardyjak, Eric R.
来源期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
出版年2011
卷号45期号:1页码:73-84
英文摘要

This paper describes the Salt Lake Valley urban flux study that was designed to understand the role of vegetation and urbanization on CO2 and surface energy fluxes over surfaces typical of urbanized and pre-urbanized land cover in the semi-arid Salt Lake Valley. The eddy covariance technique was applied at two different sites with distinct land forms within an urbanizing mountain basin. One site was located in a suburban neighborhood with substantial mature vegetative cover (urban forest), prototypical of many residential neighborhoods in the valley, and the other site was in a pre-urban area. Results indicate that the suburban site was a net sink of CO2 during the midday period in the summer due to photosynthetic activity and was a source of CO2 during the evening and nighttime periods. The pre-urban site was a net source of CO2 with positive fluxes throughout the day. Even though the vegetation at the suburban site sequestered carbon dioxide during the daytime in the summer months, the daily net CO2 flux remained positive (i.e. a net source). In addition, the net CO2 emission at the suburban site was found to be three times greater in the fall than during summer. The vegetative cover around the suburban site also had a significant impact on the partitioning of the surface energy fluxes. During the summer months, the contribution of the latent heat flux was substantially higher at the suburban site, while the sensible heat flux was much larger at the pre-urban site. The general behavior of the energy and CO2 fluxes are consistent with typical climate modification due to urbanization in semi-arid climates (i.e. introduction of an urban forest), but quite different from changes reported in more mesic climates where highly vegetated regions are replaced with urban surfaces. (C) 2010 Elsevier Ltd. All rights reserved.


英文关键词Carbon dioxide fluxes Eddy covariance Semi-arid city Surface energy budget Urban forest
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000285675600007
WOS关键词WATER-VAPOR ; CO2 FLUXES ; ATMOSPHERIC CO2 ; HEAT ; VARIABILITY ; CITY ; ENVIRONMENT ; VEGETATION ; EMISSIONS ; EXCHANGE
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/167242
作者单位Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA
推荐引用方式
GB/T 7714
Ramamurthy, Prathap,Pardyjak, Eric R.. Toward understanding the behavior of carbon dioxide and surface energy fluxes in the urbanized semi-arid Salt Lake Valley, Utah, USA[J],2011,45(1):73-84.
APA Ramamurthy, Prathap,&Pardyjak, Eric R..(2011).Toward understanding the behavior of carbon dioxide and surface energy fluxes in the urbanized semi-arid Salt Lake Valley, Utah, USA.ATMOSPHERIC ENVIRONMENT,45(1),73-84.
MLA Ramamurthy, Prathap,et al."Toward understanding the behavior of carbon dioxide and surface energy fluxes in the urbanized semi-arid Salt Lake Valley, Utah, USA".ATMOSPHERIC ENVIRONMENT 45.1(2011):73-84.
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