scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...

STP12 Abstracts
Berlin, 12 - 16 July 2010
SCOSTEP Symposium 2010
Solar influence on the stratosphere
Kodera Kunihiko
Solar-Terrestrial Environment Laboratory, Nagoya University
Stratospheric influence of the solar cycle due to the change in solar UV heating in the
stratopause region becomes evident through observational and modeling studies. Solar
response in the lower stratosphere is considered to be created by a dynamical response to the
solar forcing in the stratopause region. This process involves the interaction between the
planetary waves propagating upward in the winter stratosphere. Due to a processes similar to
the polar-night jet oscillation, the solar signal penetrates downward to the troposphere. This
process is highly non-linear and still models have a difficulty to reproduce a realistic
response. It should be noted however that we do not have a consistent observational data set
covering many solar cycle. So, in fact, we do not know what is “realistic”.
Therefore, it is important to have a conceptual model of solar response which indicates
essential feature of the solar response. Here we present a conceptual model of the solar
dynamical response in the stratosphere taking account for the structural evolution during the
winter.