DOI: 10.1002/jgrd.50832
论文题名: Interannual fluctuations in the seasonal cycle of nitrous oxide and chlorofluorocarbons due to the Brewer-Dobson circulation
作者: Simmonds P.G. ; Manning A.J. ; Athanassiadou M. ; Scaife A.A. ; Derwent R.G. ; O'Doherty S. ; Harth C.M. ; Weiss R.F. ; Dutton G.S. ; Hall B.D. ; Sweeney C. ; Elkins J.W.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10694
结束页码: 10706
语种: 英语
Scopus关键词: Chlorofluorocarbons
; Correlation methods
; Digital storage
; Mixing
; Nitrogen oxides
; Troposphere
; Brewer-Dobson circulation
; Interannual fluctuations
; Interannual variability
; Long-term observations
; Pearson correlation coefficients
; Stratosphere-troposphere exchange
; Stratospheric circulations
; Tropospheric seasonal cycles
; Upper atmosphere
; annual variation
; CFC
; chlorinated hydrocarbon
; mass transport
; monitoring
; nitrous oxide
; Northern Hemisphere
; prediction
; satellite data
; seasonal variation
; stratosphere
; trace gas
; troposphere
; Alaska
; Barrow
; California
; Connacht
; County Galway
; Ireland
; Mace Head
; Trinidad Head
; United States
英文摘要: The tropospheric seasonal cycles of N2 O, CFC-11 (CCl 3 F), and CFC-12 (CCl2 F2 ) are influenced by atmospheric dynamics. The interannually varying summertime minima in mole fractions of these trace gases have been attributed to interannual variations in mixing of stratospheric air (depleted in CFCs and N2 O) with tropospheric air with a few months lag. The amount of wave activity that drives the stratospheric circulation and influences the winter stratospheric jet and subsequent mass transport across the tropopause appears to be the primary cause of this interannual variability. We relate the observed seasonal minima of species at three Northern Hemisphere sites (Mace Head, Ireland; Trinidad Head, U.S.; and Barrow, Alaska) with the behavior of the winter stratospheric jet. As a result, a good correlation is obtained between zonal winds in winter at 10 hPa, 58°N-68°N, and the detrended seasonal minima in the stratosphere-influenced tracers. For these three tracers, individual Pearson correlation coefficients (r) between 0.51 and 0.71 were found, with overall correlations of between 0.67 and 0.77 when "composite species" were considered. Finally, we note that the long-term observations of CFCs and N 2 O in the troposphere provide an independent monitoring method complementary to satellite data. Furthermore, they could provide a useful observational measure of the strength of stratosphere-troposphere exchange and, thus, could be used to monitor any long-term trend in the Brewer-Dobson circulation which is predicted by climate models to increase over the coming decades. Key Points Relates atmospheric dynamics (STE) with N2O and CFC tracers species Inter-annually varying summertime minima and mixing of stratospheric air Prediction of changes in Brewer Donson circulation ©2013. American Geophysical Union. All Rights Reserved.
资助项目: NAG-12099
; NAG1-1805
; NAG5-3974
; NAGW-732
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63233
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: Atmospheric Chemistry Research Group, University of Bristol, Bristol BS8 1TH, United Kingdom; Met Office, Exeter, United Kingdom; Rdscientific, Newbury, United Kingdom; Scripps Institution of Oceanography, University of California, San Diego, San Diego CA, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder CO, United States; NOAA Earth System Research Laboratory, Boulder CO, United States
Recommended Citation:
Simmonds P.G.,Manning A.J.,Athanassiadou M.,et al. Interannual fluctuations in the seasonal cycle of nitrous oxide and chlorofluorocarbons due to the Brewer-Dobson circulation[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)