@COMMENT{{{This file has been generated by bib2bib 1.75}}
@COMMENT{{{Command line: /usr/bin/bib2bib -oc ocite -ob others.bib -c 'not $type : "ARTICLE" and not $type : "INPROCEEDINGS" and not $type : "PROCEEDINGS"' strings.bib descartes.bib}}
@MASTERSTHESIS{stacey96,
AUTHOR = {Stacey, Elizabeth},
TITLE = {Characterisation of a lightweight instrument for
atmospheric measurement},
SCHOOL = {Department of Chemistry, Cambridge University},
YEAR = 1996
}
@MISC{orsolini2002ec,
AUTHOR = {Orsolini, Y. and others},
TITLE = {Final report, {S}pring-to-{A}utumn {M}easurements
and {M}odelling of {O}zone and {A}ctive species},
MONTH = JUL,
YEAR = 2002,
URL = {http://www.irf.se/program/paf/descartes/orsolini2002ec.pdf}
}
@MASTERSTHESIS{roslin2003umu,
AUTHOR = {Susanne Roslin},
TITLE = {Adsorption of {CFC} on Carboxen during sampling in
the stratosphere},
SCHOOL = {Swedish Institute of Space Physics/Ume{\r{a}} University},
YEAR = 2003,
ABSTRACT = {DESCARTES is a lightweight balloon-borne instrument
for the measurement of long-lived trace gases in the
stratosphere. The principle behind the instrument is
to let a measured amount of air pass through sample
tubes containing the adsorbent Carboxen. The trace
gases will then be trapped inside the
tubes. DESCARTES is, during a flight, capable of
taking 15 samples over a range of altitudes. The
samples are analysed after recovery of the
instrument using a GC-ECD system. With the current
setup DESCARTES is optimised for CFC-11. The
objective with this study was to investigate if
quantitative adsorption of CFC-11 can be secured
during sampling with DESCARTES in the
stratosphere. In order to study the adsorption
efficiency of the sample tubes, double trap
experiments were performed to test for leakage of
CFC-11 during sampling. The results indicate that
CFC-11 exhibits an exponentially declining
distribution inside the adsorbent tube, giving rise
to an exponential increase in breakthrough when
sampling continuously. The exponential distribution
of CFC in the adsorbent tubes of DESCARTES differs
from the common way of seeing the sample tube as a
chromatographic column. Furthermore the breakthrough
of CFC-11 seems to increase exponentially when the
flow rate is increased. During a normal flight with
DESCARTES, samples are taken at pressure levels from
250 up to 20 hPa. Typical sample sizes are between
30 and 200 scc with flow rates varying from 5 to 200
sccm. If a breakthrough of 5 per cent is acceptable
most samples taken with DESCARTES can be seen as
safe samples when considering the mass flow. The
reduced pressure in the stratosphere will however
give rise to enlarged sample volumes, resulting in
volume flows of 200 to 600 ml/min. Since the
important flow parameter when considering
breakthrough seems to be somewhere in-between mass
flow and volume flow, breakthrough of CFC-11
exceeding 5 per cent may still be expected due to
the high volume flow rates occurring at low
pressure.},
URL = {http://www.irf.se/program/paf/descartes/roslin2003umu.pdf}
}
@PHDTHESIS{arvelius2005umu,
AUTHOR = {Johan Arvelius},
TITLE = {Calibration and quality assessment of {DESCARTES}
---grabsampler for stratospheric tracers},
SCHOOL = {Swedish Institute of Space Physics/Ume{\r{a}} University},
YEAR = 2005,
NOTE = {{ISBN 91-7305-945-5}},
ADDRESS = {Kiruna},
URL = {http://documents.irf.se/get_document.php?group=Administration&docid=465}
}
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