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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2378

Title: OBSERVATION OF ATMOSPHERIC CARBON MONOXIDE BY GROUND-BASED FTIR SPECTROMETER OVER ADDIS ABAB
Authors: Gezahegn, Sufa
Advisors: Dr. Gizaw Mengistu
Keywords: GROUND-BASED FTIR
SPECTROMETER
Copyright: Jul-2010
Date Added: 3-May-2012
Publisher: AAU
Abstract: In this thesis tropospheric and stratospheric CO have been derived from FTIR spectrometer and analyzed since May 17, 2009. All the sources of error indicate that it is not too much to cause signi cant error in our result. The degree of freedom (DOFs) for CO is nearly 3 which means there are about 3 independent pieces of information from the measurement. The measurement is more sensitive to lower atmosphere than upper atmosphere. The minimum and maximum mixing ratio of CO in the troposphere have been observed in November 2009 and January 2010 respectively while the stratosphere CO VMR is minimum in May 2009 and maximum in February 2010. Inter-annual variation has been detected through a relative increase in CO VMR of May 2010 compared to May 2009. Our results have also shown that the enhancement of O3 in conjunction with the enhancement of CO is associated with plumes in the upper troposphere on December 08, 2009. While stratosphere-troposphere exchange contributed to the enhancement of O3 in the upper troposphere when lowest CO VMR is seen on January 21, 2010.
URI: http://hdl.handle.net/123456789/2378
Appears in:Thesis - Physics

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