HR: 16:40h
AN: A24B-03    [Abstracts]
TI: First Look at the Upper Tropospheric Ozone Mixing Ratio From OMI Estimated Using the Cloud Slicing Technique
AU: * Bhartia, P K
EM: pawan.bhartia@nasa.gov
AF: NASA Goddard Space Flight Center, Mail Code 916, Greenbelt, MD 20771 United States
AU: Ziemke, J
EM: ziemke@code916.gsfc.nasa.gov
AF: Joint Center for Earth Systems Technology, U. of Maryland BaltimoreCounty, Catonsville, Baltimore, MD 21228
AU: Chandra, S
EM: chandra@code916.gsfc.nasa.gov
AF: Joint Center for Earth Systems Technology, U. of Maryland BaltimoreCounty, Catonsville, Baltimore, MD 21228
AU: Joiner, J
EM: joanna.joiner-1@nasa.gov
AF: NASA Goddard Space Flight Center, Mail Code 916, Greenbelt, MD 20771 United States
AU: Vasilkov, A
EM: alexander_vassilkov@ssaihq.com
AF: Science Systems & Applications, Inc., 10210 Greenbelt Rod., Ste 400, Lanham, MD 20706
AU: Taylor, S
EM: steven_taylor@ssaihq.com
AF: Science Systems & Applications, Inc., 10210 Greenbelt Rod., Ste 400, Lanham, MD 20706
AU: Yang, K
EM: kyang@ltpmail.gsfc.nasa.gov
AF: Science Systems & Applications, Inc., 10210 Greenbelt Rod., Ste 400, Lanham, MD 20706
AU: Ahn, C
EM: ahn@code916.gsfc.nasa.gov
AF: Science Systems & Applications, Inc., 10210 Greenbelt Rod., Ste 400, Lanham, MD 20706
AB: The Cloud Slicing technique has emerged as a powerful tool for the study of ozone in the upper troposphere. In this technique one looks at the variation with cloud height of the above-cloud column ozone derived from the backscattered ultraviolet instruments, such as TOMS, to determine the ozone mixing ratio. For this technique to work properly one needs an instrument with relatively good horizontal resolution with very good signal to noise in measuring above-cloud column ozone. In addition, one needs the (radiatively) effective cloud pressure rather than the cloud-top pressure, for the ultraviolet photons received by a satellite instrument are scattered from inside the cloud rather than from the top. For this study we use data from the OMI sensor, which was recently launched on the EOS Aura satellite. OMI is a UV-Visible backscattering instrument with a nadir pixel size of 13 x 24 km. The effective cloud pressure is derived from a new algorithm based on Rotational Raman Scattering and O$_{2}$-O$_{2}$ absorption in the 340-400 nm band of OMI.
DE: 3360 Remote sensing
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting