 |
| Titel |
Ozone observations by the Gas and Aerosol Measurement Sensor during SOLVE II |
| VerfasserIn |
M. C. Pitts, L. W. Thomason, J. M. Zawodny, B. N. Wenny, J. M. Livingston, P. B. Russell, J.-H. Yee, W. H. Swartz, R. E. Shetter |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 6, no. 9 ; Nr. 6, no. 9 (2006-07-06), S.2695-2709 |
| Datensatznummer |
250003984
|
| Publikation (Nr.) |
 copernicus.org/acp-6-2695-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Gas and Aerosol Measurement Sensor (GAMS) was
deployed aboard the NASA DC-8 aircraft during the second SAGE III Ozone Loss
and Validation Experiment (SOLVE II). GAMS acquired line-of-sight (LOS)
direct solar irradiance spectra during the sunlit portions of ten science
flights of the DC-8 between 12 January and 4 February 2003. Differential
line-of-sight (DLOS) optical depth spectra are produced from the GAMS raw
solar irradiance spectra. Then, DLOS ozone number densities are retrieved
from the GAMS spectra using a multiple linear regression spectral fitting
technique. Both the DLOS optical depth spectra and retrieved ozone data are
compared with coincident measurements from two other solar instruments
aboard the DC-8 platform to demonstrate the robustness and stability of the
GAMS data. The GAMS ozone measurements are then utilized to evaluate the
quality of the Wulf band ozone cross sections, a critical component of the
SAGE III aerosol, water vapor, and temperature/pressure retrievals. Results
suggest the ozone cross section compilation of Shettle and Anderson
currently used operationally in SAGE III data processing may be in error by
as much as 10–20% in the Wulf bands, and their lack of reported
temperature dependence is a significant deficiency. A second, more recent,
cross section database compiled for the SCIAMACHY satellite mission appears
to be of much better quality in the Wulf bands, but still may have errors as
large as 5% near the Wulf band absorption peaks, which is slightly larger
than their stated uncertainty. Additional laboratory measurements of the
Wulf band cross sections should be pursued to further reduce their
uncertainty and better quantify their temperature dependence. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|