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Measurement of the latitudinal distribution of NO 2 column density and layer height in Oct. / Nov. 1993
Author(s) -
Senne T.,
Stutz J.,
Platt U.
Publication year - 1996
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 - 10.1029/96gl00852
Subject(s) - atmospheric sciences , volcano , altitude (triangle) , geology , column (typography) , climatology , environmental science , mathematics , seismology , geometry , connection (principal bundle)
In October/November 1993 DOAS measurements of total columns of NO 2 and O 3 were performed on a ship cruise from Germany to South Africa. The results are compared to data collected during an earlier campaign with a similar setup [ Kreher et al . 1995], which took place in 1990, before the eruption of the Pinatubo volcano. Overall no general trend for NO 2 in 1993 in comparison to 1990 could be detected. The O 3 vertical column densities in 1993 are mostly around 280 Dobson Units, showing a significant increase to over 330 DU south of 25°S, and significantly lower O 3 values south of 50°S. The height of the NO 2 concentration maximum was calculated from the NO 2 am/pm ratio and data from ozonesondes. The resulting heights are mostly round 29 km, except in the region (south of ≈ 45°S) where the lowest ozone column densities occurred, there the calculated height is ≈ 22 km.