globalchange  > 科学计划与规划
DOI: 10.1002/2016GL071155
论文题名:
Methane mole fraction and δ13C above and below the trade wind inversion at Ascension Island in air sampled by aerial robotics
作者: Brownlow R.; Lowry D.; Thomas R.M.; Fisher R.E.; France J.L.; Cain M.; Richardson T.S.; Greatwood C.; Freer J.; Pyle J.A.; MacKenzie A.R.; Nisbet E.G.
刊名: Geophysical Research Letters
ISSN: 0094-8400
EISSN: 1944-8131
出版年: 2016
卷: 43, 期:22
起始页码: 11893
结束页码: 11902
语种: 英语
英文关键词: Ascension Island ; global carbon cycle ; greenhouse gas ; methane ; stable carbon isotope ; UAS
Scopus关键词: Boundary layers ; Commerce ; Greenhouse gases ; Sea level ; Ascension Island ; Atmospheric measurement ; Convective systems ; Global carbon cycle ; Marine boundary layers ; Southern Hemisphere ; Stable carbon isotopes ; Unmanned aerial systems ; Methane
英文摘要: Ascension Island is a remote South Atlantic equatorial site, ideal for monitoring tropical background CH4. In September 2014 and July 2015, octocopters were used to collect air samples in Tedlar bags from different heights above and below the well-defined Trade Wind Inversion (TWI), sampling a maximum altitude of 2700 m above mean sea level. Sampling captured both remote air in the marine boundary layer below the TWI and also air masses above the TWI that had been lofted by convective systems in the African tropics. Air above the TWI was characterized by higher CH4, but no distinct shift in δ13C was observed compared to the air below. Back trajectories indicate that lofted CH4 emissions from Southern Hemisphere Africa have bulk δ13CCH4 signatures similar to background, suggesting mixed emissions from wetlands, agriculture, and biomass burning. The campaigns illustrate the usefulness of unmanned aerial system sampling and Ascension's value for atmospheric measurement in an understudied region. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85004147103&doi=10.1002%2f2016GL071155&partnerID=40&md5=d1bf904c01913d9746ff244b2f0b75f9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9363
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Earth Sciences, Royal Holloway, University of London, Egham, United Kingdom

Recommended Citation:
Brownlow R.,Lowry D.,Thomas R.M.,et al. Methane mole fraction and δ13C above and below the trade wind inversion at Ascension Island in air sampled by aerial robotics[J]. Geophysical Research Letters,2016-01-01,43(22).
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