Vertical column abundances and seasonal cycle of acetylene, C2H2, above the Jungfraujoch station, derived from IR solar observations

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dc.contributor.author Zander, R.
dc.contributor.author Rinsland, C.P.
dc.contributor.author Ehhalt, D.H.
dc.contributor.author Rudolph, J.
dc.contributor.author Demoulin, Ph.
dc.date.accessioned 2010-02-04T20:51:55Z
dc.date.available 2010-02-04T20:51:55Z
dc.date.issued 1991
dc.identifier.citation J. Atmos. Chem., 13, 359-372 en
dc.identifier.uri http://hdl.handle.net/10315/2937
dc.description.abstract Monthly mean total vertical column abundances of acetylene have been determined from series of infrared solar spectra recorded at the Jungfraujoch station, Switzerland, between June 1986 and April 1991. The data have been obtained by nonlinear least-squares fittings of the 5 band R19 transition of C2H2 at 776.0818 cm-1. The average of 22 monthly mean total vertical columns of C2H2 retrieved during that time interval of almost 5 years was found to be equal to (1.81±0.12)×1015 molec/cm2, which corresponds to an average mixing ratio of (0,22±0.013) ppbv (parts per billion by volume) in a troposphere extending from the altitude of the station (3.58 km), up to 10.5 km. Despite the large variability found from year to year, a least-squares sine fit to the data reveals a seasonal variation with an amplitude of about ±40% of the mean; the maximum occurs during mid-winter and the minimum in the summer. The present results are compared critically with similar in-situ data found in the literature. A sinusoidal fit to all such free troposphere measurements made in-situ between 30°N and 60°N indicates good agreement in shape and phase with the seasonal variation derived above the Jungfraujoch, but their average column abundance, 2.3×1015 molec/cm2, is about 30% higher; this difference is explained on the basis of non-upwelling meteorological conditions generally prevailing during ground-based remote solar observations. en
dc.language.iso en en
dc.publisher Springer-The Netherlands en
dc.rights The original publication is available at www.springerlink.com en
dc.subject acetylene en
dc.subject atmospheric compositions en
dc.subject solar observations en
dc.title Vertical column abundances and seasonal cycle of acetylene, C2H2, above the Jungfraujoch station, derived from IR solar observations en
dc.type Article en
dc.rights.journal http://www.springerlink.com/content/100279/?p=f5b9e6677fe54db691aeb0944598d846&pi=0 en
dc.rights.article http://www.springerlink.com/content/knwq286153j1523v/ en

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