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| Titel |
Satellite observations of peroxyacetyl nitrate from the Aura Tropospheric Emission Spectrometer |
| VerfasserIn |
V. H. Payne, M. J. Alvarado, K. E. Cady-Pereira, J. R. Worden, S. S. Kulawik, E. V. Fischer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 11 ; Nr. 7, no. 11 (2014-11-12), S.3737-3749 |
| Datensatznummer |
250115947
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| Publikation (Nr.) |
 copernicus.org/amt-7-3737-2014.pdf |
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| Zusammenfassung |
| We present a description of the algorithm used to retrieve peroxyacetyl
nitrate (PAN) concentrations from the Aura Tropospheric Emission Spectrometer
(TES). We describe the spectral microwindows, error analysis, and the
utilization of a priori and initial guess information provided by the
GEOS-Chem global chemical transport model. The TES PAN retrievals contain up
to one degree of freedom for signal. In general, the retrievals are most
sensitive to PAN in the mid-troposphere. Estimated single-measurement
uncertainties are on the order of 30 to 50%. The detection limit for a
single TES measurement is dependent on the atmospheric and surface conditions
as well as on the instrument noise. For observations where the cloud optical
depth is less than 0.5, we find that the TES detection limit for PAN is in
the region of 200 to 300 pptv. We show that PAN retrievals capture plumes
associated with boreal burning. Retrievals over the Northern Hemisphere
Pacific in springtime show spatial features that are qualitatively consistent
with the expected distribution of PAN in outflow of Asian pollution. |
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