Abstract
The global effects of the 2004 El Nino on tropospheric ozone and H/sub 2/O based on Aura OMI and MLS measurements are analyzed. Although it was a weak El Nino from a historical perspective, it produced significant changes in these parameters in tropical latitudes. Tropospheric ozone increased by 10-20% over most of the western Pacific region and decreased by about the same amount over the eastern Pacific region. H/sub 2/O in the upper troposphere showed similar changes but with opposite sign. These zonal changes in tropospheric ozone and H/sub 2/O are caused by the eastward shift in the Walker circulation in the tropical pacific region during El Nino. During the 2004 El Nino, biomass burning did not have a significant effect on the ozone budget in the troposphere, unlike the 1997 El Nino. Zonally averaged tropospheric column ozone did not change significantly either globally or over tropical latitudes
| Original language | English |
|---|---|
| Article number | L06802 |
| Pages (from-to) | L06802-1/5 |
| Number of pages | 5 |
| Journal | Geophysical Research Letters |
| Volume | 34 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2007 |