Abstract
We investigate the influence of topography on Venus’ atmospheric general circulation. Based on comparative simulations with and without the Venusian topography, we elucidate the role of the topography in the fully developed superrotation. Orographically forced stationary waves are predominant over Mt. Maxwell: slightly weakening the superrotation near the cloud top. Differently from previous GCM results, the orographically forced waves do not produce significant asymmetry between the northern and southern hemispheric superrotations in the present model. Weak surface flows from mountains to lowlands are caused by the pressure dependence of the Newtonian cooling. The pattern and magnitude of the near-surface flow are largely different from those simulated in the Herrnstein and Dowling (2007) model. This implies that the parameterizations of physical processes (such as Newtonian cooling, turbulence, diffusion, and surface drag) and the model resolution could significantly influence the pattern and magnitude of the near-surface flow and the orographical forcing of planetary-scale stationary waves.
| Original language | English |
|---|---|
| Pages (from-to) | e45-e48 |
| Journal | Earth, Planets and Space |
| Volume | 61 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1 2009 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Geology
- Space and Planetary Science
Cite this
Influences of Venus’ topography on fully developed superrotation and near-surface flow. / Yamamoto, Masaru; Takahashi, Masaaki.
In: Earth, Planets and Space, Vol. 61, No. 10, 01.10.2009, p. e45-e48.Research output: Contribution to journal › Letter
}
TY - JOUR
T1 - Influences of Venus’ topography on fully developed superrotation and near-surface flow
AU - Yamamoto, Masaru
AU - Takahashi, Masaaki
PY - 2009/10/1
Y1 - 2009/10/1
N2 - We investigate the influence of topography on Venus’ atmospheric general circulation. Based on comparative simulations with and without the Venusian topography, we elucidate the role of the topography in the fully developed superrotation. Orographically forced stationary waves are predominant over Mt. Maxwell: slightly weakening the superrotation near the cloud top. Differently from previous GCM results, the orographically forced waves do not produce significant asymmetry between the northern and southern hemispheric superrotations in the present model. Weak surface flows from mountains to lowlands are caused by the pressure dependence of the Newtonian cooling. The pattern and magnitude of the near-surface flow are largely different from those simulated in the Herrnstein and Dowling (2007) model. This implies that the parameterizations of physical processes (such as Newtonian cooling, turbulence, diffusion, and surface drag) and the model resolution could significantly influence the pattern and magnitude of the near-surface flow and the orographical forcing of planetary-scale stationary waves.
AB - We investigate the influence of topography on Venus’ atmospheric general circulation. Based on comparative simulations with and without the Venusian topography, we elucidate the role of the topography in the fully developed superrotation. Orographically forced stationary waves are predominant over Mt. Maxwell: slightly weakening the superrotation near the cloud top. Differently from previous GCM results, the orographically forced waves do not produce significant asymmetry between the northern and southern hemispheric superrotations in the present model. Weak surface flows from mountains to lowlands are caused by the pressure dependence of the Newtonian cooling. The pattern and magnitude of the near-surface flow are largely different from those simulated in the Herrnstein and Dowling (2007) model. This implies that the parameterizations of physical processes (such as Newtonian cooling, turbulence, diffusion, and surface drag) and the model resolution could significantly influence the pattern and magnitude of the near-surface flow and the orographical forcing of planetary-scale stationary waves.
UR - http://www.scopus.com/inward/record.url?scp=85014177706&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85014177706&partnerID=8YFLogxK
U2 - 10.1186/BF03352962
DO - 10.1186/BF03352962
M3 - Letter
AN - SCOPUS:85014177706
VL - 61
SP - e45-e48
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
IS - 10
ER -