An intercomparison of airborne nitrogen dioxide instruments
| Autor: | G. W. Harris, J. M. Hoell, A. L. Torres, Scott T. Sandholm, M. A. Carroll, H. I. Schiff, D. R. Karecki, Douglas D. Davis, Alan Fried, Brian A. Ridley, Michael O. Rodgers, Gervase I. Mackay, Donald R. Hastie, John D. Bradshaw, Gerald L. Gregory |
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| Rok vydání: | 1990 |
| Předmět: |
Atmospheric Science
Ozone Ecology Meteorology Instrumentation Parts-per notation Analytical chemistry Paleontology Soil Science Forestry Aquatic Science Oceanography chemistry.chemical_compound Geophysics chemistry Space and Planetary Science Geochemistry and Petrology Atmospheric chemistry Earth and Planetary Sciences (miscellaneous) Measuring instrument Mixing ratio Calibration Nitrogen dioxide Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research: Atmospheres. 95:10103-10127 |
| ISSN: | 0148-0227 |
| Popis: | Results on NO2 instruments are reported from the NASA Global Tropospheric Experiment Chemical Instrumentation Test and Evaluation 2 (CITE 2) program in summer 1986. The instruments tested were (1) a two-photon LIF system using a laser for NO2-NO photolysis, (2) a chemiluminescence (CL) detector using FeSO4 for NO2-NO conversion, (3) a CL detector using an arc lamp for NO2-NO photolysis, and (4) a tunable-laser-diode multipath-absorption system. The procedures for the CITE 2 ground-based and flight tests are described in detail, and the results are presented in extensive graphs. Instrument (2) was eliminated because the FeSO4 converted atmospheric PAN to NO, resulting in spuriously high NO2 values. The remaining instruments gave readings in 30-40-percent agreement at NO2 mixing ratios of 100-200 parts per trillion by volume (pptv). At ratios below 50 pptv, the correlation among the measurements was very poor, with a tendency for system (4) to give higher values than (1) or (3). |
| Databáze: | OpenAIRE |
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