Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 1352-2310 |
EISSN | 1873-2844 |
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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