HR: 09:15h
AN: A31B-06    [PDF]
TI: POAM III Ozone and Water Vapor in the Upper Troposphere and Lower Stratosphere
AU: * Allen, D R
EM: drallen@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Prados, A I
EM: prados@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Nedoluha, G E
EM: nedoluha@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Bevilacqua, R M
EM: bevilacqua@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Hoppel, K W
EM: karl.hoppel@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AB: We present Upper Troposphere/Lower Stratosphere (UT/LS) observations from the Polar Ozone and Aerosol Measurement (POAM) III instrument. POAM is a remote sensing instrument that uses the solar occultation technique to measure trace gas species and aerosol extinction at high latitudes. POAM began measurements in April 1998 and is still operational. Ozone and water vapor observations on potential temperature and potential vorticity surfaces will be presented, in order to study seasonal and interannual variability in the abundance of these species in the UT/LS. Isentropic stratosphere-troposphere exchange is examined by means of ozone/water vapor correlations. We find evidence of isentropic exchange from the upper troposphere at lower latitudes to the lower stratosphere at high latitudes during summer and fall. We also use POAM observations in conjunction with isentropic advection calculations of ozone, water vapor, and tracer-derived equivalent length to study seasonal variability in isentropic transport in the lowermost stratosphere.
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 0368 Troposphere--constituent transport and chemistry
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting