Premium
Column abundance measurements of atmospheric hydroxyl at 45°S
Author(s) -
Wood S. W.,
Keep D. J.,
Burnett C. R.,
Burnett E. B.
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 - 10.1029/94gl01285
Subject(s) - abundance (ecology) , southern hemisphere , atmospheric sciences , zenith , environmental science , solar zenith angle , column (typography) , climatology , physics , geology , geodesy , ecology , mathematics , biology , geometry , connection (principal bundle)
The first Southern Hemisphere measurements of the vertical column abundance of atmospheric hydroxyl (OH) have been obtained at Lauder, New Zealand (45°S) with a PEPSIOS instrument measuring the absorption of sunlight at 308 nm. The variation of column OH with solar zenith angle is similar to that measured at other sites. However average annual abundances of OH are about 20% higher than those found by similar measurements at 40°N. Minimum OH abundances, about 10% less than average levels at 40°N, are observed during austral spring. The OH abundance abruptly increases by 30% in early summer and remains at the elevated level until late the following winter.