Stratosphere-Troposphere Analyses of Regional Transport (START) Experiment

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Stratosphere-Troposphere Analyses of Regional
Transport (START) Experiment
Investigators Laura Pan (PI, ACD/TIIMES) Ken
Bowman (Texas AM) Mel Shapiro (NOAA/NCARMMM) Bill
Randel (ACD) Rushan Gao (NOAA) Teresa Campos
(ACD/EOL) Chris Davis (MMM) Sue Schauffler (ACD)
Collaborators Chris Barnet Jennifer
Wei (NOAA/NESDIS Satellite data)
Satellite data support Sylvia Murphy (ACD)
Frontal Cloud - flt 2005-12-14
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Acknowledgments
Jorgen Jensen Al Schanot Al Cooper Jeff
Stith Henry Boynton, Bob Maxson, Lowell
Genzlinger and Ed Ringleman Rit Carbone Brian
Ridley
Enter the Rockies - FLT 051209
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Upper Troposphere Lower Stratosphere - A
region of coupled dynamics, chemistry and cloud
microphysics
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HIAPER Progressive Science Mission (22 November-
23 December, 2005)
Daybreak before take off 2005-12-21
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NASA A-Train Satellites
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Science Objectives

• Characterize the dynamical structure of the
  extratropical tropopause in and around the
  subtropical jet
• Identify the chemical transition from the
  troposphere to stratosphere across the
  extratropical tropopause.
• Investigate the irreversible STE mixing
  produced by multiple scale dynamical processes

Low pass of Rockies- Flt 2005-12-07
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AIRS Ozone on 250 hPa (in 1x1 degree average)
May 15, 2004
Monthly mean May, 2004
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AIRS Ozone Cross Section (1x1 degree average)
May 15, 2004, Lon160 E
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Chemical Transition using Relative Altitude
(RALT) and Tracer-Tracer Correlations (TTC)
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Example NASA ER-2, POLARIS July 10, 1997
Pan et al., 2004
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The Relative Altitude Coordinates (to locate
the chemical transition between St-Tr)
CO (RALT)
CO (z)
CO (pv)
Pan et al., 2004
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ER-2 data O3-H2O (POLARIS)
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Model Evaluation
WACCM3
1.9x2.5
4x5
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START Experiment Highlights

• Four successful flights (7-9 hour each, out of 6
  planned)
• Measurements O3, H2O, CO, in addition to
  meteorological parameters (and other possible
  tracers such as CN)
• Near real time satellite data via collaboration
  with AIRS science team
• Sampled several cases of stratospheric intrusion
• Obtained information on mixing and STE
• Valuable data for AIRS ozone validation

Meteor Crater - Flight 2005-12-07
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Status of Data and Data Analyses

• Ozone data became available during the
  experiment. Intercomparison with CMDL ozonesonde
  show excellent agreement.
• Initial analyses and comparison with satellite
  data, meteorological analyses data have been
  carried out
• Water vapor preliminary data became available 2
  weeks ago, further calibration in progress
• CO data is still under Q/C verification
• Trajectory analyses in progress

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Ozone Validation with CMDL Ozonesonde
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START Flight 2 (502RF03 -051207)
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Flight RF03 - 2005-12-07
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START Flight 2 (RF03 -051207)
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Enhancement of Ozone at Lower Troposphere due to
the Intrusion
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START Flight 4 RF08 - 2005-12-14
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START Flight 4 RF08 - 2005-12-14
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(No Transcript)
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START Flt 4 2005-12-14
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START Flight 1 2005-12-01 (502RF01)
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START Flight 1 2005-12-01 (502RF01)
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Stratospheric Intrusion and the Separation of the
Thermal and Dynamical Tropopause
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O3 (z)
O3 (RALT)
H2O (RALT)
H2O (z)
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Summary

• Results from the START experiment
• Demonstrated the capability of HIAPER in UTLS
  studies
• Initial data provided good validation for the
  satellite retrievals
• Sampled multiple cases of stratospheric
  intrusions. Characterization of the air mass in
  the region of intrusion using tracer-tracer
  correlation and trajectory model is in progress

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Thank You !
Shadows of Monument Valley - Flight 051209