A general circulation model study of the solar and QBO modulation of the stratospheric circulation during the northern hemisphere winter

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/91GL01610· OSTI ID:5643226

Kodera, Kunihiko; Chiba, Masaru; Shibata, Kiyotaka ^[1]

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1. Meteorological Research Inst., Tsukuba (Japan)

A general circulation model has been used to study the modulation of north-polar temperatures during winter by both solar activity and the equatorial quasi-biennial oscillation (QBO). The variation of solar activity was simulated by changing the heating rate due to the absorption of ultraviolet (UV) radiation by ozone, while the QBO zonal wind fields were reproduced by incorporating zonal-momentum sources in the equatorial stratosphere. A total of 10 experiments were conducted by changing the heating rate from 70 to 110% for each of the simulated QBO easterly and westerly cases. The results of the numerical experiments show modulation effects similar to those found by Labitzke (1987) in the 30-mb temperatures at the North Pole.

• OSTI ID: 5643226
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 18:7; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
ABSORPTION
AMBIENT TEMPERATURE
ARCTIC REGIONS
ATMOSPHERIC CIRCULATION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EQUATOR
GENERAL CIRCULATION MODELS
HEATING RATE
MATHEMATICAL MODELS
OSCILLATIONS
OZONE
POLAR REGIONS
RADIATIONS
SOLAR ACTIVITY
STRATOSPHERE
ULTRAVIOLET RADIATION
VARIATIONS
WIND