DOI: 10.1002/jgrd.50221
论文题名: Decadal time series of tropospheric abundance of N<inf>2</inf>O isotopomers and isotopologues in the Northern Hemisphere obtained by the long-term observation at Hateruma Island, Japan
作者: Toyoda S. ; Kuroki N. ; Yoshida N. ; Ishijima K. ; Tohjima Y. ; Machida T.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3369
结束页码: 3381
语种: 英语
英文关键词: isotopomer ratios
; mass spectrometry
; secular trend
; temporal variation
; troposphere
Scopus关键词: Atmospheric chemistry
; Light sources
; Mass spectrometry
; Mixing
; Nitrogen
; Nitrogen oxides
; Time series
; Troposphere
; Atmospheric nitrous oxide
; isotopomer ratios
; Long-term observations
; Nitrogen isotope ratio
; Nitrous oxide
; Oxygen isotope ratios
; Secular trend
; Temporal variation
; Isotopes
; air sampling
; atmospheric pollution
; decadal variation
; long-term change
; mass spectrometry
; nitrogen isotope
; nitrogen oxides
; Northern Hemisphere
; time series
; troposphere
; Hateruma
; Japan
; Okinawa [Ryukyu Islands]
; Ryukyu Islands
; Sakishima Islands
; Yaeyama Islands
英文摘要: Decadal time series and short-term temporal variations in mixing ratio of atmospheric nitrous oxide (N2 O) and abundance of its isotopomers (14N15N16O and 15N 14N16O) and isotopologue (14N 14N18O) relative to 14N14N 16O have been observed for the first time in the Northern Hemisphere at Hateruma Island (HAT), Japan during 1999-2010 by monthly air sampling. Results show that the bulk nitrogen isotope ratio δ15N bulk decreased at the rate of -0.023 ± 0.006‰ yr -1, although the N2 O mixing ratio increased at the rate of about 0.7 nmol mol-1 yr-1 (ppb yr-1) during the period. Isotope budget calculation with the δ15N bulk trend supports the earlier estimates showing that the isotopically light sources such as agriculture and industry contribute to the increase of atmospheric N2 O. However, the rate of decrease of δ15Nbulk is slightly smaller in magnitude than the rates obtained virtually for the 20th century from firn air in polar regions and surface air in the Southern Hemisphere (Tasmania and Antarctica), which suggests greater contribution of 15 N-enriched N2 O sources in recent years or in the extra-polar Northern Hemisphere. In contrast, the oxygen isotope ratio (δ18O) and intramolecular 15N site preference (SP, difference between isotope ratios at central and terminal nitrogen atoms) of N2 O showed no significant trends, contrary to previous reports. Results show that no significant seasonal variation exists in δ15Nbulk, δ18O, and SP of N 2 O at HAT in the past decade within the limits of our sampling frequency and analytical precision. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63810
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Environmental Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan; Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, Yokohama, Japan; Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; National Institute for Environmental Studies, Tsukuba, Japan
Recommended Citation:
Toyoda S.,Kuroki N.,Yoshida N.,et al. Decadal time series of tropospheric abundance of N<inf>2</inf>O isotopomers and isotopologues in the Northern Hemisphere obtained by the long-term observation at Hateruma Island, Japan[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)