干旱区生态环境知识资源中心(Arid): Urbanization Impacts on Evapotranspiration Across Various Spatio-Temporal Scales

Arid

DOI	10.1029/2021EF002045
	Urbanization Impacts on Evapotranspiration Across Various Spatio-Temporal Scales
	Mazrooei, Amir; Reitz, Meredith; Wang, Dingbao; Sankarasubramanian, A.
通讯作者	Mazrooei, A (corresponding author), Natl Ctr Atmospher Res, Res Applicat Lab, POB 3000, Boulder, CO 80307 USA.
来源期刊	EARTHS FUTURE
EISSN	2328-4277
出版年	2021
卷号	9 期号:8
英文摘要	Urbanization has been shown to locally increase the nighttime temperatures creating urban heat islands, which partly arise due to evapotranspiration (ET) reduction. It is unclear how the direction and magnitude of the change in local ET due to urbanization varies globally across different climatic regimes. This knowledge gap is critical, both for the key role of ET in the energy and water balance accounting for the majority of local precipitation, and for reducing the urban heat island effect. We explore and assess the impacts of urbanization on monthly and mean annual ET across a range of landscapes from local to global spatial scales. Remotely sensed land cover and ET available at 1 km resolution are used to quantify the differences in ET between urban and surrounding non-urban areas across the globe. The observed patterns show that the statistically significant difference between urban and non-urban ET can be estimated to first order as a function of local hydroclimate, with arid regions seeing increased ET, and humid regions showing decreased ET. Cities under cold climates also evaporate more than their non-urban surroundings during the winter, as the urban micro-climate has increased energy availability resulting from human activities. Increased ET in arid cities arises from municipal water withdrawals and increased irrigation during drought conditions. These results can help inform planners to improve the integration of environmental conditions into the design and management of urban landscapes. Plain Language Summary We explore and assess the impacts of urbanization on evapotranspiration (ET) fluxes across a range of landscapes from local to global spatial scales, and monthly to mean annual timescales. Remotely sensed land cover and ET data are used to quantify the differences in ET between urban and surrounding non-urban areas. The observed patterns show the difference between urban and non-urban ET can be estimated to first order as a function of local hydroclimate with arid/humid regions seeing increased/decreased ET due to urbanization at various time scales. Cities under cold climates also evaporate more than its non-urban surroundings during the winter as the urban micro-climate has increased energy availability resulting from human activity. Increased ET in arid cities arises from municipal water withdrawals and increased lawn irrigation during drought conditions further increases the ET from arid urban cities compared to non-urban ET. Comparatively, urbanization results in decreased ET in a humid city and this magnitude substantially varies across the seasons with the spring and summer seasons being higher than the fall season and minimal changes during the winter season due to limited energy availability. This information can help to inform planners for improved environmental conditions in designing urban landscapes
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000688531200005
WOS关键词	URBAN HEAT-ISLAND ; UNITED-STATES ; WATER ; CLIMATE ; ENERGY ; FLUXNET ; PHOENIX ; MODELS ; ALBEDO
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362969
作者单位	[Mazrooei, Amir] Natl Ctr Atmospher Res, Res Applicat Lab, POB 3000, Boulder, CO 80307 USA; [Reitz, Meredith] USGS, Hydrol Remote Sensing Branch, Reston, VA USA; [Wang, Dingbao] Univ Cent Florida, Dept Civil & Environm Engn, Orlando, FL 32816 USA; [Sankarasubramanian, A.] North Carolina State Univ, Dept Civil & Environm Engn, Raleigh, NC USA
推荐引用方式 GB/T 7714	Mazrooei, Amir,Reitz, Meredith,Wang, Dingbao,et al. Urbanization Impacts on Evapotranspiration Across Various Spatio-Temporal Scales[J]. United States Geological Survey,2021,9(8).
APA	Mazrooei, Amir,Reitz, Meredith,Wang, Dingbao,&Sankarasubramanian, A..(2021).Urbanization Impacts on Evapotranspiration Across Various Spatio-Temporal Scales.EARTHS FUTURE,9(8).
MLA	Mazrooei, Amir,et al."Urbanization Impacts on Evapotranspiration Across Various Spatio-Temporal Scales".EARTHS FUTURE 9.8(2021).