The vertical connection of the quasi-biennial oscillation-modulated 11 year solar cycle signature in geopotential height and planetary waves during Northern Hemisphere early winter

Modulation of northern hemisphere wintertime stationary planetary wave activity: East Asian climate relationships by the Quasi-Biennial Oscillation

[1] The modulation of the relationship between the tropospheric stationary planetary wave activity and the East Asian winter climate by the tropical quasi-biennial oscillation (QBO) wind in the stratosphere is investigated. In the QBO easterly phase, a significant warming appears in northeastern Asia in the presence of high wave activities. This corresponds to a weakened East Asian trough at 50...

Quasi-biennial oscillation influence on long-period planetary waves in the Antarctic upper mesosphere

[1] Long-period planetary wave data derived from meteor wind observations recorded over a 12-year period with the SuperDARN radar at Halley, Antarctica, are presented and compared with the phase of the quasi-biennial oscillation (QBO) throughout the equatorial stratosphere. Enhanced planetary wave activity in the Antarctic upper mesosphere is found during the summer months, when the QBO in the ...

Frozen-in anticyclones occurring in polar Northern Hemisphere during springtime: Characterization, occurrence and link with quasi-biennial oscillation

Solar forcing of winter climate variability in the Northern Hemisphere

An influence of solar irradiance variations on Earth’s surface climate has been repeatedly suggested, based on correlations between solar variability and meteorological variables1. Specifically, weaker westerly winds have been observed in winters with a less active sun, for example at the minimum phase of the 11-year sunspot cycle2–4. With some possible exceptions5,6, it has proved difficult fo...

The Seasonal Cycle of Planetary Waves in the Winter Stratosphere

A simple mechanistic model, with time-independent planetary wave forcing at the lower boundary, is used to investigate the observed differences between the Northern Hemisphere (NH) and Southern Hemisphere (SH) stratospheric evolution. Considered here are differences in both the zonal mean and the zonal wavenumber 1 structure of the winter vortex throughout its seasonal evolution. In particular,...