To study the latitudinal variation of tropospheric ozone over the eastern Pacific Ocean, we derive ozone in the lower troposphere by subtracting TOMS column ozone over the Andes from the ozone column over the eastern Pacific Ocean. The analysis of tropospheric ozone climatology in conjunction with meteorological and biomass-burning data suggests three latitude bands with different characteristi...

[1] Conflicting interpretations of the spring ozone maximum observed at Bermuda (32 N, 65 W) have fueled the debate on stratospheric influence versus tropospheric production as sources of tropospheric ozone. We use a global three-dimensional (3-D) model of tropospheric ozone-NOx-hydrocarbon chemistry driven by assimilated meteorological observations to reconcile these past interpretations. The ...

Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract The causes of high tropospheric column ozone values over the Tropical Atlantic Ocean during September, October, and November (SON) are investigated by examining lightning during 1998–2001. The cause for high tropospheric column ozone in the hemisphere opp...

Ozone profiles are often used to investigate day-to-day and year-to-year variability in origins of free tropospheric ozone. With this in mind, more than 50 ozonesonde launches were conducted in Beltsville, MD, during the summers of 2004 through 2007. Budgets of free tropospheric ozone were calculated for each ozone profile in the four summers using a laminar identification (LID) method and unus...

Tropical tropospheric ozone derived using Clear-Cloudy Pairs (CCP) of TOMS measurements M. J. Newchurch, D. Sun, J. H. Kim, and X. Liu Atmospheric Science Department, University of Alabama in Huntsville, USA Department of Atmospheric Science, Pusan National University, Korea Received: 8 November 2002 – Accepted: 19 December 2002 – Published: 13 January 2003 Correspondence to: M. J. Newchurch (m...

Introduction Conclusions References

Introduction Conclusions References

This work describes the first method to determine the tropical tropospheric ozone column directly from the Total Ozone Mapping Spectrometer (TOMS) space-borne instrument based on the physical differences in ozonecolumn detection as a function of its scan-angle geometry. Comparisons to tropical ozonesonde observations suggest the accuracy of these retrievals is ;20%. Tropospheric ozone derived f...

[1] The tropospheric ozone residual method is used to derive zonal maps of tropospheric column ozone using concurrent measurements of total column ozone from Nimbus 7 and Earth Probe (EP) Total Ozone Mapping Spectrometer (TOMS) and stratospheric column ozone from the Microwave Limb Sounder (MLS) instrument on the Upper Atmosphere Research Satellite (UARS). Our study shows that the zonal variabi...