HR: 15:10h
AN: A13H-06 [Abstracts]
TI: ENSO-Induced Enhancement of Tropospheric O3 During Summer over South Asia
AU: * THENGUMTHARA, K
EM: kunhikrishn.thengumthara-1@nasa.gov
AF: NASA LANGLEY RESEARCH CENTER, Chemistry and Dynamics Branch
Mail Stop 483, Hampton, VA 23681-2199, United States
AU: Crawford, J H
EM: james.h.crawford@nasa.gov
AF: NASA LANGLEY RESEARCH CENTER, Chemistry and Dynamics Branch
Mail Stop 483, Hampton, VA 23681-2199, United States
AU: Fishman, J
EM: jack.fishman@nasa.gov
AF: NASA LANGLEY RESEARCH CENTER, Chemistry and Dynamics Branch
Mail Stop 483, Hampton, VA 23681-2199, United States
AU: Mark, L G
EM: lawrence@mpch-mainz.mpg.de
AF: MAX PLANK INSTITUTE FOR CHEMISTRY, Joh.-Joachim-Becher-Weg 27, Mainz, D-55128,
Germany
AU: Richter, A
EM: richter@iup.physik.uni-bremen.de
AF: University of Bremen, Institute for Environmental Physics and Remote Sensing,
Otto-Hahn-Allee 1, Bremen, 28359, Germany
AU: Burrows, J P
EM: john.burrows@iup.physik.uni-bremen.de
AF: University of Bremen, Institute for Environmental Physics and Remote Sensing,
Otto-Hahn-Allee 1, Bremen, 28359, Germany
AB:
Long-term satellite observations from NASA-TOMS and ERSII-GOME/SCIAMACHY over north India especially the
Indo-Gangetic plain show an enhanced abundance of tropospheric O3 and NOx in summer with substantial
interannual variability linked to ENSO-induced changes in the Walker circulation. MATCH-MPIC model results
using tagged CO tracers demonstrate how changes in this circulation lead to increased influence of emissions
from China and southeast Asia on upper tropopsheric O3 over India during ENSO conditions. The impact of
ENSO is further demonstrated in the correlation between the anomaly in tropospheric ozone residual data derived
from TOMS and the velocity potential anomaly over north India and the equatorial Indian Ocean associated with
convective uplift and transport through Walker cells.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0933 Remote sensing
DE: 4522 ENSO (4922)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting