Open AccessStratospheric NO 2 variations from a long time series at Lauder, New Zealand
Author(s) -
Liley J. B.,
Johnston P. V.,
McKenzie R. L.,
Thomas A. J.,
Boyd I. S.
Publication year - 2000
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1999jd901157
Subject(s) - sunset , sunrise , climatology , secular variation , environmental science , atmospheric sciences , southern oscillation , stratosphere , zenith , quasi biennial oscillation , el niño southern oscillation , geology , physics , geodesy , astronomy , geophysics
Eighteen years of NO 2 measurements using zenith‐scattered sunlight are analyzed for seasonal, cyclic, and episodic variability and secular trends. The analysis shows a marked increase in stratospheric NO 2 over the period, corresponding to a trend of 5% per decade, and the influences of both the El Chichón and Pinatubo eruptions are clearly evident. Smaller effects of the El Niño‐Southern Oscillation and quasi‐biennial oscillation are apparent, but correlation with the solar cycle is poor after correction for autocorrelation. All of these effects are similar for sunrise and sunset NO 2 .