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| Titel |
Greenhouse gas analysis of air samples collected onboard the CARIBIC passenger aircraft |
| VerfasserIn |
T. J. Schuck, C. A. M. Brenninkmeijer, F. Slemr, I. Xueref-Remy, A. Zahn |
| 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 ; 2, no. 2 ; Nr. 2, no. 2 (2009-08-21), S.449-464 |
| Datensatznummer |
250000561
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| Publikation (Nr.) |
 copernicus.org/amt-2-449-2009.pdf |
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| Zusammenfassung |
CARIBIC (Civil Aircraft for the Regular Investigation
of the atmosphere Based on an Instrument Container)
is a long-term atmospheric measurement program based on the use of a
comprehensive scientific instrument package aboard a commercial passenger aircraft.
In addition to real-time measurements,
whole air sampling is performed regularly
at cruising altitudes in the tropical middle troposphere and
the extra-tropical UT/LS region.
Air samples are analyzed for greenhouse gases, NMHCs,
halocarbons, and trace gas isotopic composition.
The routinely performed
greenhouse gas analysis comprises gas chromatography
measurements of CO2, CH4, N2O and SF6.
The air sampling procedure, the GC system and its performance are described.
Comparisons with similar systems employed in other laboratories
and a comparison with results
from a CO2 in-situ analyzer that is also part of the CARIBIC instrumentation are shown.
In addition, the time series of CO2, obtained from the collection of 684 samples at latitudes
between 30° N and 56° N on 21 round trips out of
Germany to different destinations in Asia
between November 2005 and October 2008,
is presented. A time shift in the seasonal cycle of about one month was
observed between the upper troposphere and the tropopause region.
For two sets of return flights from Germany to the Philippines
the relationship between the
four greenhouse gases is briefly discussed. |
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