Raeumliche und zeitliche Variationen atmosphaerischer Spurengase aus bodengebundenen Messungen mit Hilfe eines Michelson Interferometers

Abstract

Measurements of atmospheric trace gases, recorded in the Arctic at 79 N, are presented and discussed. The results obtained in the Arctic are compared with corresponding observations performed in the Antarctic by the JPL (Jet Propulsion Laboratory, California Institute of Technology). Furthermore, trace gas measurements are presented which have been recorded during a ship cruise between 60 N and 40 S. The experiments have been performed from the ground using a high resolution Michelson interferometer. Methods have been developed to use the moon as light source during the polar night. In order to detect other trace gases of interest, absorbing in the UV/vis and not the IR, measurement techniques have been developed to detect them in the UV/vis by using an interferometer. The results for the stratospheric trace gases have been compared with suitable model calculations and could be used for a validation of the model. The results can be summarised in the following four points: (1) Spectroscopic measurements and data analysis, (2) Seasonal variations in the Arctic at 79 N, (3) Comparison of the results from the Arctic with corresponding observations from the Antarctic at 78 S, (4) Latitudinal dependence of the trace gas concentrations between 60N and 40S. (orig.)SIGLEAvailable from TIB Hannover: RN 9219(329) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman