DOI: 10.1002/jgrd.50419
论文题名: Atmospheric aerosol properties over the equatorial Indian Ocean and the impact of the Madden-Julian Oscillation
作者: Langley Dewitt H. ; Coffman D.J. ; Schulz K.J. ; Alan Brewer W. ; Bates T.S. ; Quinn P.K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5736
结束页码: 5749
语种: 英语
英文关键词: atmospheric composition
; atmospheric transport
; middle atmosphere
; ozone chemistry
Scopus关键词: Atmospheric aerosols
; Atmospheric composition
; Atmospheric movements
; Atmospheric thermodynamics
; Climatology
; Oceanography
; Atmospheric conditions
; Atmospheric transport
; Continental air mass
; Equatorial Indian Ocean
; Madden-Julian oscillation
; Marine boundary layers
; Middle atmosphere
; Ozone chemistry
; Atmospheric chemistry
; aerosol
; boundary layer
; marine ecosystem
; monsoon
; oceanic convection
; sea salt
; vertical mixing
; Indian Ocean
英文摘要: The chemical, physical, and optical properties of sub- and supermicrometer aerosols over the equatorial Indian Ocean were measured on board the R/V Revelle during the fall 2011 Dynamics of the Madden-Julian Oscillation field campaign. During this time, both the retreating of the Asian monsoon and two Madden-Julian Oscillation (MJO) events were observed. The R/V Revelle was on station (0.1°N and 80.5°E) to measure atmospheric and oceanic conditions between 4 October and 30 October 2011 (Leg 2) and 11 November and 4 December 2011 (Leg 3). Throughout the campaign, background marine atmospheric conditions were usually observed. As the Asian monsoon season retreated over the boreal fall and the general wind direction changed from southerly to northerly transporting, respectively, clean marine and polluted continental air masses, the average submicrometer aerosol mass nearly doubled from Leg 2 to Leg 3 and the aerosol appeared to be more influenced by continental sources. The effect of MJO-associated convection anomalies on aerosols in the remote marine boundary layer (MBL) was measured during November when a complete MJO convection wave moved over the equatorial Indian Ocean and during October when a partial MJO event was observed. MJO-associated convection strongly affected the local aerosol as increased vertical mixing introduced new particles into the MBL, rainout cleared the atmosphere of submicrometer aerosol particles, and high winds enhanced the concentration of sea salt aerosol particles in the local atmosphere. Four stages of MJO-affected aerosol population changes in the remote Indian Ocean are defined. © 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/63701
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: Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, United States; Aix Marseille Univ., Laboratoire Chemie Environnement (LCE), Equipe Instrumentation et Réactivité Atmosphérique (IRAA), 13 331 Marseille, France; Earth System Research Laboratory, NOAA, Boulder, CO, United States
Recommended Citation:
Langley Dewitt H.,Coffman D.J.,Schulz K.J.,et al. Atmospheric aerosol properties over the equatorial Indian Ocean and the impact of the Madden-Julian Oscillation[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)