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FTIR measurements of HF, N 2 O and CFCs during the Arctic polar night with the Moon as light source, subsidence during winter 1992/93
Author(s) -
Notholt J.
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 - 10.1029/94gl02351
Subject(s) - altitude (triangle) , atmospheric sciences , zenith , subsidence , arctic , polar night , environmental science , atmosphere (unit) , geology , stratosphere , meteorology , geodesy , geography , oceanography , geomorphology , geometry , mathematics , structural basin
Ground based FTIR absorption measurements have been performed to study the zenith column densities of HF, N 2 O, CFC‐12 and CFC‐22. The spectra were recorded in the Arctic (Ny‐Ålesund, Spitsbergen, 79°N, 12°E) during winter 1992/93 and spring/summer 1993. During the polar night the moon served as light source. The analysis of the spectra has been performed in the way to study vertical motions in the atmosphere. Compared to the summer observations a subsidence of −1.4 km at 12 km altitude and −4.9 km at about 15 km has been calculated for December 1992. For February 1993 the data yield a subsidence of −2.5 km at 12 km altitude and −6.3 km at about 15 km altitude.