Arid
DOI10.1029/2007JG000523
Soil N2O and NO emissions from an arid, urban ecosystem
Hall, Sharon J.; Huber, David; Grimm, Nancy B.
通讯作者Hall, Sharon J.
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN0148-0227
出版年2008
卷号113期号:G1
英文摘要

We measured soil nitrogen (N) cycling and fluxes of N2O and NO in three land-use types across the metropolitan area of Phoenix, Arizona. Urbanization increased N2O emissions compared to native landscapes, primarily due to the expansion of fertilized and irrigated lawns. Fluxes of N2O from lawns ranged from 18 to 80 mu g N m(-2) h(-1) and were significantly larger than managed xeric landscapes (2.5-22 mu g N m(-2) h(-1)) and remnant desert sites within the urban core (3.7-14 mu g N m(-2) h(-1)). In contrast, average NO fluxes from lawns were not significantly different from native desert when dry (6-80 mu g N m(-2) h(-1) lawn; 5-16 mu g N m(-2) h(-1) desert) and were lower than fluxes from deserts after wetting events. Furthermore, urbanization has significantly altered the temporal dynamics of NO emissions by replacing pulse-driven desert ecosystems with year-round irrigated, managed lawns. Short-term, pulse-driven emissions of NO from wetting of dry desert soils may reach 35% of anthropogenic emissions within a day after summer monsoon storms. If regional O-3 production is NOx-limited during the monsoon season, fluxes from warm, recently wet arid soils may contribute to summer O-3 episodes.


类型Article
语种英语
国家USA
收录类别SCI-E ; SSCI
WOS记录号WOS:000253531900001
WOS关键词NITROGEN-OXIDE EMISSIONS ; NITRIC-OXIDE ; FOREST ECOSYSTEMS ; UNITED-STATES ; LAND-USE ; TROPOSPHERIC CHEMISTRY ; BIOGENIC EMISSIONS ; REACTIVE NITROGEN ; SONORAN DESERT ; GAS EMISSIONS
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向Environmental Sciences & Ecology ; Geology
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/158224
作者单位Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA
推荐引用方式
GB/T 7714
Hall, Sharon J.,Huber, David,Grimm, Nancy B.. Soil N2O and NO emissions from an arid, urban ecosystem[J]. Arizona State University,2008,113(G1).
APA Hall, Sharon J.,Huber, David,&Grimm, Nancy B..(2008).Soil N2O and NO emissions from an arid, urban ecosystem.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,113(G1).
MLA Hall, Sharon J.,et al."Soil N2O and NO emissions from an arid, urban ecosystem".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 113.G1(2008).
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