Airborne In Situ Observations of Tracers and Ozone In The Upper Troposphere Lower Stratosphere During The Egrett Campaign.
Abstract
In May/June 2000, a Tunable Diode Laser Absorption Spectrometer (TDLAS) mak- ing high spatial resolution in situ measurements of methane, and the DIRAC in situ gas chromatograph measuring CFCs operated onboard the EGRETT high-altitude re- search. The campaign based in Boscombe Down, U.K. (51.1N, 1.7W), was aimed to study the effects of gravity waves, mixing and filamentation in the upper tropo- sphere lower stratosphere (UTLS) region. Ninety hours of data have been collected over southern England, Wales and Ireland between the 350K and 390K isentropic lev- els. The EGRETT carried instruments to measure winds and turbulences, as well as water vapor, methane, CFCs and ozone.
In this poster, observed fluctuations in the measured tracers and ozone mixing ra- tios are used to investigate fine-scale dynamical structures observed during the cam- paign. The SLIMCAT 3D Chemical Transport Model (CTM) and the MIMOSA high- resolution model of the advection of potential vorticity on isentropic surfaces are also compared to the observations. The ability of the two models to reproduce fine-scale filamentation processes in the UTLS region will be discussed.- Publication:
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EGS General Assembly Conference Abstracts
- Pub Date:
- 2002
- Bibcode:
- 2002EGSGA..27.4632G