Stratosphere-Troposphere Exchange Studies during T-Rex

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Stratosphere-Troposphere Exchange Studies during
T-Rex

• Investigators
• Laura Pan (PI, mission scientist)
• Brian Ridley (co-mission scientist)
• Sue Schauffler (co-mission scientist)
• Teresa Campos (H2O, CO)
• Andy Weinheimer and Ilana Pollack (O3 )
• Mel Shapiro (flight planning)
• Andy Heymsfield (microphyscs)

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UTLS - region of coupled dynamics, chemistry and
cloud microphysics
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General Science Questions

• STE of radiatively sensitive and chemically
  significant species (especially O3, H2O, and
  aerosols)
• When - seasonality
• Where - preferred location
• How - controlling mechanisms
• How much - can we quantify

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What controls mixing
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Pan et al., 2005
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Where does mixing occur?
Strong gradient case
Weak gradient case
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GW and mesoscale model
from Todd Lane
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Opportunities during T-Rex

• Coupling and relative roles of large and small
  scale dynamical processes in controlling STE

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Aberystwyth MST Radar
Inertia-Gravity Wave generating and breaking at
the tropopause
Pavelin, Whiteway, and Vaughan, JGR, 2001
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Large scale transport (G. Vaughan and Co.)
5 June 2000
Egrett
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Horizontal flight leg 11.4 km altitude
Turbulent mixing of ozone and water vapour just
above the tropopause
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Wave Structure in the lower Stratosphere near the
Subtropical Jet 20 km, ER-2over Honolulu,
Hawaii PTOST Experiment, 02-03/2003 Ozone Data
from FASTOZ, NASA Langley Black Ozone (ppm),
Red Theta-400K/100K, Blue WNS/10 m/s
From Melody Avery, NASA Langley
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Gravity Waves over Western Greenland DC-8
SOLVE-2, 01/21/2003 In Situ Data FASTOZ and
DACOM NASA Langley Research Center
Waves
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Thank you!