Physics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.4801m&link_type=abstract
American Astronomical Society, DPS meeting #41, #48.01
Physics
Scientific paper
Recent observations by the Visible and INfrared Thermal Imaging Spectrometer (VIRTIS) on Venus Express in the near-infrared spectral windows on the nightside of Venus confirm significant variations in cloud cover with latitude, and also reveal evidence of variations in cloud cover with solar hour angle. Previous simulations of the Venus cloud microphysics by the author had used a temporally-constant and globally-averaged insolation profile to aid in determining the radiative balance in the clouds of Venus. However, since the diurnal changes occur on timescales of several days (the atmospheric rotation rate), while the convection that occurs as a consequence of the radiative-dynamical feedback can occur on the timescale of hours, these diurnal changes can play a role in the distribution of cloud cover in the atmosphere of Venus. Here, we present a series of 2D (zonal and vertical) simulations that begin to investigate some of the effects of diurnally-varying insolation on the microphysics of the clouds over a range of latitudes.
Grinspoon David H.
McGouldrick Kevin
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