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In March through November 1994, the NASA ER-2 flew out of Barbers Point, Hawaii, and Christchurch, New Zealand. These flights constituted the ASHOE/MAESA mission.
The ASHOE part of the mission was intended to examine the causes of ozone loss in the Southern Hemisphere lower stratosphere and to investigate how the loss is related to polar, mid-latitude, and tropical processes. Another part, MAESA, was to provide information about stratospheric photochemistry and transport for assessing the potential environmental effects of stratospheric aircraft.
![[ASHOE DIAGRAM]](ashoe_diagram.gif)
This is a diagram produced by NASA Ames showing the geographic regions covered in the ASHOE/MAESA mission. For the MAESA part of the mission, a few flights were flown from the Barbers Point Naval Air station on Oahu in Hawaii, where the ER-2 stopped over while being ferried to and from New Zealand. Continuing ferry flights through Fiji (where the plane had to stop for refueling) provided additional data, as did flights north (towards the equator) from Christchurch. The ASHOE flights were generally flown south from Christchurch, New Zealand, towards the polar vortex.
Some sights from the mission
Here are some pictures taken during
the ASHOE/MAESA mission.
The Official NASA web page for the ASHOE/MAESA experiment is maintained by the Earth Science Division Project Office at NASA Ames Research Center.
ASHOE/MAESA Investigators
- Project Leadership
- A. Tuck (NOAA Aeronomy Lab): ASHOE Project Scientist
- W. Brune (Penn State U): MAESA Project Scientist
- ER-2 instruments
- J. Anderson (Harvard): High-altitude OH experiment (HOx)
- D. Baumgardner and J. Dye (NCAR): Multiple-angle aerosol spectrometer probe
- K. Boering (Harvard): High-sensitivity fast-response CO2 analyzer
- K.R. Chan NASA Ames): ER-2 meteorological measurement system
- J. Elkins (NOAA Climate Monitoring & Diagnostics Lab) and D. Fahey (NOAA Aeronomy Lab): Four-channel Airborne Chromatograph for Atmospheric Trace Species (ACATS)
- D. Fahey (NOAA Aeronomy Lab): Reactive nitrogen
- B. Gary (NASA Ames): Microwave temperature profiler
- K. Kelly (NOAA Aeronomy Lab): Lyman alpha hygrometer
- M. Lowenstein (NASA Ames): Airborne tunable laser absorption spectrometer
- C.T. McElroy (Atmospheric Environmental Service, Environment Canada): Composition and photodissociative flux measurement
- M. Proffitt (NOAA Aeronomy Lab): Dual-beam UV-absorption ozone photometer
- R. Pueschel (NASA Ames): Ames particle sampler impactor experiment
- W. Smith (U Wisconsin-Madison): High resolution interferometer sounder
- R. Stimpfle (Harvard): Multiple axis resonance fluorescence chemical conversion detector for ClO and BrO
- C. Webster (NASA JPL): Aircraft laser infrared absorption spectrometer
- J. C. Wilson (U. Denver): Multi-sample aerosol collection system
- Theory team
- R. Atkinson (Cooperative Center for Southern Hemisphere Meteorology, Monash U, Australia): Tracer transport in the Southern Hemisphere winter
- D. Johnson (U Wisconsin-Madison): Isentropic analysis and modeling of the Southern Hemisphere circulation and exchange within the wintertime stratospheric vortex during ASHOE/MAESA
- S. Lloyd, D. Anderson, and R. DeMajistre (Johns Hopkins U): Radiation field modeling and data analysis
- A. Matthews, N. Jones, and P. Johnston (NIWA Climate, New Zealand): Co-relative ground based measurements during ASHOE/MAESA
- P. Newman (NASA Goddard): Meteorological analysis for ASHOE/MAESA
- A. O'Neill (U Reading) and R. Davies (UKMO): UGAMP/UKMO studies of transport and photochemistry in the Southern Hemisphere
- B. Pierce and W. Gross (NASA Langley): ASHOE/MAESA lagrangian air mass studies
- R. A. Plumb (MIT): Dynamics and transport during ASHOE/MAESA
- R. Salawitch and S. Wofsy (Harvard): Chemical modeling of radicals
What this mission accomplished
Here is the end-of-mission statement drafted by the project scientists at its close in November 1994.
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