A search for five month solar induced periodicity in the stratosphere

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL016i007p00711· OSTI ID:5609931

Chandra, S ^[1]

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1. NASA-Goddard Space Flight Center, Greenbelt, MD (USA)

Recent studies of solar UV spectra and various indices of solar activity indicate a strong period at about 5 months. In the 10.7 cm solar radio flux (F10.7), a conventional index for the solar EUV and UV variabilities, the spectral power of the 5 month period is comparable to the well known 27 day solar period. However, in the solar UV flux at 205 nm, directly measured from the Nimbus-7 SBUV spectrometer, the (spectral) power of the 5 month period is about half that of the 27 day period. This paper examines the possible impact of the 5 month solar period on ozone and temperature at various pressure levels in the stratosphere and discusses the implications of differences in solar forcing at the 27 day and 5 month periods. It is shown that ozone, both in the lower and upper stratosphere, has a measurable response to solar UV forcing 27 days. Such a solar response is not observed at 5 month period because of a relatively weaker 5 month solar UV component in the solar signal and a strong interference from dynamical signals associated with planetary wave activity.

• OSTI ID: 5609931
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 16:7; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
CORRELATIONS
DATA ANALYSIS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
FUNCTIONS
OZONE
RADIATIONS
RESPONSE FUNCTIONS
SATELLITES
SOLAR ACTIVITY
SOLAR FLUX
SPECTROSCOPY
STRATOSPHERE
TEMPERATURE DEPENDENCE
ULTRAVIOLET RADIATION
VARIATIONS