Relationship between OH measurements on two different NASA aircraft during PEM Tropics B

F. L. Eisele, R. L. Mauldin, D. J. Tanner, C. Cantrell, E. Kosciuch, J. B. Nowak, William Henry Brune, I. Faloona, D. Tan, D. D. Davis, L. Wang, G. Chen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

OH measurements were performed on both the P3-B and the DC-8 aircraft throughout Pacific Exploratory Mission (PEM) Tropics B, using two very different measurement techniques. While no direct comparison was possible because of the difference in flight paths of the two aircraft, two brief measurement periods in close proximity allow at least a glimpse of how the two measurements compare. The first comparison took place in the marine boundary layer and showed exceptionally good agreement between the two aircraft OH measurements. The second set of close proximity flights at 5.5-km altitude resulted in an average concentration difference approximately equal to the uncertainty limit associated with either individual instrument but much less than the combined uncertainties from all the contributing measurements. In both cases the comparisons were made by normalizing the data with a photostationary state model. In addition, a comparison of the OH concentrations measured by each aircraft from 25° N latitude to 25° S latitude over the entire longitude and altitude range of the mission resulted in agreement within ∼10% but with a trend of higher DC-8 /P-3B OH ratios at higher altitudes. While a definitive comparison of these two OH instruments must await a far more rigorous future test, the present results show that there were no clear OH measurement discrepancies observed. The dramatic differences in these two measurement techniques also minimizes the chance of common interferences or calibration errors.

Original languageEnglish (US)
Article number2000JD900714
Pages (from-to)32683-32689
Number of pages7
JournalJournal of Geophysical Research Atmospheres
Volume106
Issue numberD23
DOIs
StatePublished - Dec 16 2001

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Tropics
aircraft
tropical regions
NASA
tropics
Aircraft
flight
airborne survey
proximity
DC 8 aircraft
uncertainty
flight paths
boundary layer
Flight paths
normalizing
comparison
longitude
calibration
high altitude
boundary layers

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Eisele, F. L., Mauldin, R. L., Tanner, D. J., Cantrell, C., Kosciuch, E., Nowak, J. B., ... Chen, G. (2001). Relationship between OH measurements on two different NASA aircraft during PEM Tropics B. Journal of Geophysical Research Atmospheres, 106(D23), 32683-32689. [2000JD900714]. https://doi.org/10.1029/2000JD900714
Eisele, F. L. ; Mauldin, R. L. ; Tanner, D. J. ; Cantrell, C. ; Kosciuch, E. ; Nowak, J. B. ; Brune, William Henry ; Faloona, I. ; Tan, D. ; Davis, D. D. ; Wang, L. ; Chen, G. / Relationship between OH measurements on two different NASA aircraft during PEM Tropics B. In: Journal of Geophysical Research Atmospheres. 2001 ; Vol. 106, No. D23. pp. 32683-32689.
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abstract = "OH measurements were performed on both the P3-B and the DC-8 aircraft throughout Pacific Exploratory Mission (PEM) Tropics B, using two very different measurement techniques. While no direct comparison was possible because of the difference in flight paths of the two aircraft, two brief measurement periods in close proximity allow at least a glimpse of how the two measurements compare. The first comparison took place in the marine boundary layer and showed exceptionally good agreement between the two aircraft OH measurements. The second set of close proximity flights at 5.5-km altitude resulted in an average concentration difference approximately equal to the uncertainty limit associated with either individual instrument but much less than the combined uncertainties from all the contributing measurements. In both cases the comparisons were made by normalizing the data with a photostationary state model. In addition, a comparison of the OH concentrations measured by each aircraft from 25° N latitude to 25° S latitude over the entire longitude and altitude range of the mission resulted in agreement within ∼10{\%} but with a trend of higher DC-8 /P-3B OH ratios at higher altitudes. While a definitive comparison of these two OH instruments must await a far more rigorous future test, the present results show that there were no clear OH measurement discrepancies observed. The dramatic differences in these two measurement techniques also minimizes the chance of common interferences or calibration errors.",
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Eisele, FL, Mauldin, RL, Tanner, DJ, Cantrell, C, Kosciuch, E, Nowak, JB, Brune, WH, Faloona, I, Tan, D, Davis, DD, Wang, L & Chen, G 2001, 'Relationship between OH measurements on two different NASA aircraft during PEM Tropics B', Journal of Geophysical Research Atmospheres, vol. 106, no. D23, 2000JD900714, pp. 32683-32689. https://doi.org/10.1029/2000JD900714

Relationship between OH measurements on two different NASA aircraft during PEM Tropics B. / Eisele, F. L.; Mauldin, R. L.; Tanner, D. J.; Cantrell, C.; Kosciuch, E.; Nowak, J. B.; Brune, William Henry; Faloona, I.; Tan, D.; Davis, D. D.; Wang, L.; Chen, G.

In: Journal of Geophysical Research Atmospheres, Vol. 106, No. D23, 2000JD900714, 16.12.2001, p. 32683-32689.

Research output: Contribution to journalArticle

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T1 - Relationship between OH measurements on two different NASA aircraft during PEM Tropics B

AU - Eisele, F. L.

AU - Mauldin, R. L.

AU - Tanner, D. J.

AU - Cantrell, C.

AU - Kosciuch, E.

AU - Nowak, J. B.

AU - Brune, William Henry

AU - Faloona, I.

AU - Tan, D.

AU - Davis, D. D.

AU - Wang, L.

AU - Chen, G.

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Y1 - 2001/12/16

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Eisele FL, Mauldin RL, Tanner DJ, Cantrell C, Kosciuch E, Nowak JB et al. Relationship between OH measurements on two different NASA aircraft during PEM Tropics B. Journal of Geophysical Research Atmospheres. 2001 Dec 16;106(D23):32683-32689. 2000JD900714. https://doi.org/10.1029/2000JD900714