DOI: 10.1016/j.atmosenv.2014.09.077
Scopus记录号: 2-s2.0-84907970839
论文题名: UV-induced N2O emission from plants
作者: Bruhn D ; , Albert K ; R ; , Mikkelsen T ; N ; , Ambus P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 99 起始页码: 206
结束页码: 214
语种: 英语
英文关键词: Epicuticular wax
; Greenhouse gas
; Nitrous oxide
; Plant
; Ultra violet radiation
; Vegetation
Scopus关键词: Vegetation
; Epicuticular waxes
; Nitrous oxide
; Plant
; Ultra violet
; Greenhouse gases
; nitrous oxide
; oxygen
; atmospheric pollution
; grass
; greenhouse gas
; nitrous oxide
; ozone
; stratosphere
; ultraviolet radiation
; wax
; abiotic stress
; Article
; controlled study
; darkness
; field emission
; grass
; laboratory test
; leaf surface
; nitrous oxide emission
; nonhuman
; oxygen concentration
; plant environment interaction
; radiation response
; solar radiation
; sunlight
; terrestrial species
; ultraviolet A radiation
; ultraviolet B radiation
; ultraviolet radiation
; vegetation
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Nitrous oxide (N2O) is an important long-lived greenhouse gas and precursor of stratospheric ozone-depleting mono-nitrogen oxides. The atmospheric concentration of N2O is persistently increasing; however, large uncertainties are associated with the distinct source strengths. Here we investigate for the first time N2O emission from terrestrial vegetation in response to natural solar ultra violet radiation. We conducted field site measurements to investigate N2O atmosphere exchange from grass vegetation exposed to solar irradiance with and without UV-screening. Further laboratory tests were conducted with a range of species to study the controls and possible loci of UV-induced N2O emission from plants.Plants released N2O in response to natural sunlight at rates of c. 20-50nmolm-2h-1, mostly due to the UV component. The emission response to UV-A is of the same magnitude as that to UV-B. Therefore, UV-A is more important than UV-B given the natural UV-spectrum at Earth's surface. Plants also emitted N2O in darkness, although at reduced rates. The emission rate is temperature dependent with a rather high activation energy indicative for an abiotic process. The prevailing zone for the N2O formation appears to be at the very surface of leaves. However, only c. 26% of the UV-induced N2O appears to originate from plant-N. Further, the process is dependent on atmospheric oxygen concentration. Our work demonstrates that ecosystem emission of the important greenhouse gas, N2O, may be up to c. 30% higher than hitherto assumed. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80519
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemical and Biochemical Engineering, Centre for Ecosystems and Environmental Sustainability (ECO), Technical University of Denmark (DTU), Lyngby, Denmark; Centre for Earth, Planetary, Space and Astronomical Research, The Open University, Walton Hall, Milton Keynes, United Kingdom
Recommended Citation:
Bruhn D,, Albert K,R,et al. UV-induced N2O emission from plants[J]. Atmospheric Environment,2014-01-01,99