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Ground‐based FTIR measurements of vertical column densities of several trace gases above Spitsbergen
Author(s) -
Notholt J.,
Schrems O.
Publication year - 1994
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 - 10.1029/93gl01786
Subject(s) - polar vortex , vortex , trace gas , subsidence , atmospheric sciences , polar , geology , environmental science , meteorology , physics , geomorphology , structural basin , astronomy
During the EASOE campaign ground‐based FTIR measurements have been performed in March 1992 at Ny‐Ålesund (Spitsbergen, 79°N, 12°E) to derive column amounts of several trace gases. For the first part of the measurement campaign Ny‐Ålesund was situated inside the polar vortex. The obtained concentrations of N 2 O, CH 4 and HF inside the vortex are consistent with subsidence. The ratio of HCl strat /HF varied from about 2.0 inside to about 2.8 outside the vortex. Inside the vortex low values for NO 2 and high values for HNO 3 were found. The O 3 concentrations inside the vortex are slightly lower than what was observed outside the vortex.