FastFind »   Lastname: doi:10.1029/ Year: | Advanced Search  

AGU: Geophysical Research Letters

 

Keywords

  • intra-seasonal oscillation
  • Madden-Julian Oscillation
  • tropospheric ozone
  • Ozone Monitoring Instrument
  • Microwave Limb Sounder

Index Terms

  • Atmospheric Composition and Structure: Troposphere: composition and chemistry
  • Atmospheric Composition and Structure: Troposphere: constituent transport and chemistry
  • Atmospheric Processes: Boundary layer processes
  • Atmospheric Processes: Convective processes
  • Atmospheric Processes: Ocean/atmosphere interactions

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L17804, 5 PP., 2007
doi:10.1029/2007GL030965

Intra-seasonal variability in tropospheric ozone and water vapor in the tropics

J. R. Ziemke

Goddard Earth Sciences and Technology, University of Maryland Baltimore County, Baltimore, Maryland, USA

S. Chandra

Goddard Earth Sciences and Technology, University of Maryland Baltimore County, Baltimore, Maryland, USA

M. R. Schoeberl

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

L. Froidevaux

NASA Jet Propulsion Laboratory, Pasadena, California, USA

W. G. Read

NASA Jet Propulsion Laboratory, Pasadena, California, USA

P. F. Levelt

Royal Dutch Meteorological Institute, De Bilt, Netherlands

P. K. Bhartia

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Nearly two years of tropospheric O3 and H2O data from the Aura Ozone Monitoring Instrument (OMI) and Microwave Limb Sounder (MLS) instruments are analyzed to study the characteristics of intra-seasonal oscillation (ISO) of 20–100 day periods. The analysis shows the presence of ISO signals in O3 and H2O throughout much of the tropics including the north Atlantic not shown in previous studies. ISO variability west of the dateline appears as a manifestation of eastward propagation of the Madden-Julian Oscillation (MJO). Time series of tropospheric O3 and H2O are negatively correlated throughout much of the tropics, and mostly over ocean. This suggests lofting of air from convection as a basic driving mechanism, with convection transporting low amounts of O3 and high amounts of H2O upwards from the boundary layer. ISO/MJO related changes in O3 and H2O are a major source of variability and often exceed 25% of background concentrations.

Received 11 June 2007; accepted 1 August 2007; published 5 September 2007.

Citation: Ziemke, J. R., S. Chandra, M. R. Schoeberl, L. Froidevaux, W. G. Read, P. F. Levelt, and P. K. Bhartia (2007), Intra-seasonal variability in tropospheric ozone and water vapor in the tropics, Geophys. Res. Lett., 34, L17804, doi:10.1029/2007GL030965.

Cited By

Please wait one moment ...