DOI: 10.1002/jgrd.50181
论文题名: The contributions of chemistry and transport to low arctic ozone in March 2011 derived from Aura MLS observations
作者: Strahan S.E. ; Douglass A.R. ; Newman P.A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1563
结束页码: 1576
语种: 英语
英文关键词: arctic vortex
; ozone loss
; stratospheric ozone
; transport
Scopus关键词: Atmospherics
; Ozone
; Ozone layer
; Upper atmosphere
; Chemistry and transport models
; Heterogeneous chemical reaction
; Heterogeneous chemistry
; Lowermost stratosphere
; Microwave limb sounder
; Ozone loss
; Stratospheric ozone
; transport
; Vortex flow
; arctic environment
; climatology
; flow modeling
; heterogeneity
; ozone
; seasonal variation
; simulation
; stratosphere
; transport process
; vortex
英文摘要: Stratospheric and total columns of Arctic O3 (63-90 oN) in late March 2011 averaged 320 and 349 DU, respectively, 50-100 DU lower than any of the previous 6 years. We use Aura Microwave Limb Sounder (MLS) O3 observations to quantify the roles of chemistry and transport and find there are two major reasons for low O3 in March 2011: heterogeneous chemical loss and a late final warming that delayed the resupply of O3 until April. Daily vortex-averaged partial columns in the lowermost stratosphere (p > 133 hPa) and middle stratosphere (p < 29 hPa) are largely unaffected by local heterogeneous chemistry, according to model calculations. Very weak transport into the vortex between late January and late March contributes to the observed low ozone. The lower stratospheric (LS) column (133-29 hPa, ∼370-550 K) is affected by both heterogeneous chemistry and transport. Because MLS N2 O data show strong isolation of the vortex, we estimate the contribution of vertical transport to LS O3 using the descent of vortex N2 O profiles. Simulations with the Global Modeling Initiative (GMI) chemistry and transport model (CTM) with and without heterogeneous chemical reactions show 73 DU vortex averaged O3 loss; the loss derived from MLS O3 is 84 ± 12 DU. The GMI simulation reproduces the observed O3 and N2 O with little error and demonstrates credible transport and chemistry. Without heterogeneous chemical loss, March 2011 vortex O3 would have been at least 40 DU lower than climatology due to the late final warming that did not resupply O3 until mid-April. Key PointsWe calculate 84 DU ozone loss inside the March 2011 Arctic vortex from MLS dataThe GMI model reproduces MLS O3 and N2O and calculates a 73 DU lossMarch ozone is lower than usual in part because ozone resupply occurred in April ©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/63955
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: Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Code 614, Greenbelt, MD 20771, United States
Recommended Citation:
Strahan S.E.,Douglass A.R.,Newman P.A.. The contributions of chemistry and transport to low arctic ozone in March 2011 derived from Aura MLS observations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)