Open Access

A numerical study of the Martian atmospheric convection with a two-dimensional anelastic model

  • Masatsugu Odaka1Email author,
  • Kensuke Nakajima2,
  • Shinichi Takehiro2,
  • Masaki Ishiwatari3 and
  • Yoshi-Yuki Hayashi1
Earth, Planets and Space201450:BF03352130

DOI: 10.1186/BF03352130

Received: 2 August 1997

Accepted: 26 February 1998

Published: 6 June 2014

Abstract

Thermal convection of the Martian lower atmosphere is examined by the use of a two-dimensional anelastic model with a resolution fine enough to describe convection eddies.

For a homogeneous radiative cooling of 50 K/day given in the layer below 5 km, a layer of time-dependent convection develops up to about 6 km in height. The intensity of realized vertical winds ranges up to 20 m/s. The dust, which is injected into the lowest layer and treated as a passive tracer, is transported immediately in the convection layer and mixed uniformly.

The intensity of the horizontal winds near the surface reaches about 10 m/s, which, combined with large-scale motions, is expected to contribute to the dust injection into the atmosphere.