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Groundbased spectroscopic measurements of stratospheric NO 2 and OClO in Arctic winter 1989/90
Author(s) -
Fiedler M.,
Frank H.,
Gomer T.,
Hausmann M.,
Pfeilsticker K.,
Platt U.
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl00088
Subject(s) - zenith , stratosphere , atmospheric sciences , environmental science , differential optical absorption spectroscopy , arctic , absorption (acoustics) , physics , optics , geology , oceanography
During January and February 1990 groundbased UV/visible spectroscopic observations of direct moon light and zenith scattered sun light were performed near Kiruna, Sweden at 67.9°N, 21.1°E. From the measured differential absorption of NO 2 and OClO the corresponding slant column abundances were determined and converted to vertical column densities using airmass factors evaluated by a ray tracing model. Upper limits for the stratospheric NO 2 column of 0.4–0.9 · 10 15 /cm² were deduced and elevated levels of OClO could be detected during Feb. 6–8.