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Your search keyword '"Shetter, R. E."' showing total 5 results
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5 results on '"Shetter, R. E."'

1. Impact of aircraft emissions on reactive nitrogen over the North Atlantic Flight Corridor region

Author

Koike, M., Kondo, Y., Ikeda, H., Gregory, G. L., Anderson, B. E., Sachse, G. W., Donald Blake, Liu, S. C., Singh, H. B., Thompson, A. M., Kita, K., Zhao, Y., Sugita, T., Shetter, R. E., and Toriyama, N.

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

2. An assessment of western North Pacific ozone photochemistry based on springtime observations from NASA's PEM-West B (1994) and TRACE-P (2001) field studies

Author

Anderson, B. E., Avery, M. A., Barrick, J. D., Blake, D. R., Blake, N., Browell, E. V., Chen, G., Crawford, J. H., Cunnold, D. M., Davis, D. D., Dinunno, B., Fenn, M. A., William Grant, Heikes, B. G., Hudgins, C. H., Jing, P., Kondo, Y., Lefer, B., Liu, S., Oltmans, S., Sachse, G. W., Sandholm, S. T., Shetter, R. E., Tan, D., and Vay, S. A.

3. Peroxy radical behavior during the Transport and Chemical Evolution over the Pacific (TRACE-P) campaign as measured aboard the NASA P-3B aircraft

Author

Cantrell, C. A., Edwards, G. D., Stephens, S., Mauldin, R. L., Mark Zondlo, Kosciuch, E., Eisele, F. L., Shetter, R. E., Lefer, B. L., Hall, S., Flocke, F., Weinheimer, A., Fried, A., Apel, E., Kondo, Y., Blake, D. R., Blake, N. J., Simpson, I. J., Bandy, A. R., Thornton, D. C., Heikes, B. G., Singh, H. B., Brune, W. H., Harder, H., Martinez, M., Jacob, D. J., Avery, M. A., Barrick, J. D., Sachse, G. W., Olson, J. R., Crawford, J. H., and Clarke, A. D.

4. Photolysis frequency of NO2: Measurement and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI)

Author

Shetter, R. E., Junkermann, W., Swartz, W. H., Frost, G. J., Crawford, J. H., Lefer, B. L., Barrick, J. D., Hall, S. R., Hofzumahaus, A., Bais, A., Calvert, J. G., Cantrell, C. A., Madronich, S., Müller, M., Kraus, A., Paul Monks, Edwards, G. D., Mckenzie, R., Johnston, P., Schmitt, R., Griffioen, E., Krol, M., Kylling, A., Dickerson, R. R., Lloyd, S. A., Martin, T., Gardiner, B., Mayer, B., Pfister, G., Röth, E. P., Koepke, P., Ruggaber, A., Schwander, H., and Weele, M.

5. Airborne measurement of OH reactivity during INTEX-B

Author

Mao, J., Ren, X., Brune, W. H., Olson, J. R., Crawford, J. H., Fried, A., Huey, L. G., Cohen, R. C., Heikes, B., Singh, H. B., Donald Blake, Sachse, G. W., Diskin, G. S., Hall, S. R., and Shetter, R. E.

Subjects
atmospheric chemistry, gas-phase reactions, interference, hox, lcsh:QC1-999, laser-induced fluorescence, lcsh:Chemistry, lcsh:QD1-999, photochemical data, city, Physical Sciences and Mathematics, pump, tropical pacific, lcsh:Physics
Abstract

The measurement of OH reactivity, the inverse of the OH lifetime, provides a powerful tool to investigate atmospheric photochemistry. A new airborne OH reactivity instrument was designed and deployed for the first time on the NASA DC-8 aircraft during the second phase of Intercontinental Chemical Transport Experiment-B (INTEX-B) campaign, which was focused on the Asian pollution outflow over Pacific Ocean and was based in Hawaii and Alaska. The OH reactivity was measured by adding OH, generated by photolyzing water vapor with 185 nm UV light in a moveable wand, to the flow of ambient air in a flow tube and measuring the OH signal with laser induced fluorescence. As the wand was pulled back away from the OH detector, the OH signal decay was recorded; the slope of −Δln(signal)/Δ time was the OH reactivity. The overall absolute uncertainty at the 2σ confidence levels is about 1 s−1 at low altitudes (for decay about 6 s−1), and 0.7 s−1 at high altitudes (for decay about 2 s−1). From the median vertical profile obtained in the second phase of INTEX-B, the measured OH reactivity (4.0±1.0 s−1) is higher than the OH reactivity calculated from assuming that OH was in steady state (3.3&plusmn0.8 s−1), and even higher than the OH reactivity that was calculated from the total measurements of all OH reactants (1.6±0.4 s−1). Model calculations show that the missing OH reactivity is consistent with the over-predicted OH and under-predicted HCHO in the boundary layer and lower troposphere. The over-predicted OH and under-predicted HCHO suggest that the missing OH sinks are most likely related to some highly reactive VOCs that have HCHO as an oxidation product.

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