Numerical experiments on the general circulation of Venus' atmosphere

The Maritime Continent plays a role in the global circulation pattern, due to the energy released by convective condensation over the region which influences the global atmospheric circulation. We demonstrate that tropical cyclones contribute to drying the Maritime Continent atmosphere, influencing the definition of the onset of the dry season. The process was investigated using observational data and reanalysis. Our findings were confirmed by numerical experiments using low- and high-resolution versions of the CMCC-CM2 General Circulation Model contributing to the HighResMIP CMIP6 effort.

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Some numerical experiments using a two-level general circulation model

Quarterly Journal of the Royal Meteorological Society ◽

10.1002/qj.49709540310 ◽

1969 ◽

Vol 95 (403) ◽

pp. 148-162 ◽

Cited By ~ 2

Author(s):

D. J. Davies ◽

D. R. Davies

Keyword(s):

General Circulation Model ◽

Numerical Experiments ◽

General Circulation ◽

Circulation Model

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Analysis of results of numerical experiments with an atmospheric general circulation model with allowance for peculiarities of the underlying surface in megalopolises

Russian Meteorology and Hydrology ◽

10.3103/s1068373909100045 ◽

2009 ◽

Vol 34 (10) ◽

pp. 650-656

Author(s):

K. G. Rubinshtein ◽

E. V. Nabokova ◽

E. N. Egorova ◽

A. A. Vasil’ev

Keyword(s):

General Circulation Model ◽

Numerical Experiments ◽

General Circulation ◽

Atmospheric General Circulation Model ◽

Circulation Model ◽

Underlying Surface ◽

Atmospheric General Circulation ◽

Analysis Of Results

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Global atmospheric response to specific linear combinations of the main SST modes. Part I: numerical experiments and preliminary results

Annales Geophysicae ◽

10.1007/s00585-996-1066-7 ◽

1996 ◽

Vol 14 (10) ◽

pp. 1066-1077 ◽

Cited By ~ 1

Author(s):

S. Trzaska ◽

V. Moron ◽

B. Fontaine

Keyword(s):

Numerical Experiments ◽

General Circulation ◽

Large Scale ◽

Southern Oscillation ◽

Regional Scale ◽

Circulation Model ◽

Atmospheric Model ◽

Equatorial Atlantic ◽

Preliminary Results ◽

The Impact

Abstract. This article investigates through numerical experiments the controversial question of the impact of El Niño-Southern Oscillation (ENSO) phenomena on climate according to large-scale and regional-scale interhemispheric thermal contrast. Eight experiments (two considering only inversed Atlantic thermal anomalies and six combining ENSO warm phase with large-scale interhemispheric contrast and Atlantic anomaly patterns) were performed with the Météo-France atmospheric general circulation model. The definition of boundary conditions from observed composites and principal components is presented and preliminary results concerning the month of August, especially over West Africa and the equatorial Atlantic are discussed. Results are coherent with observations and show that interhemispheric and regional scale sea-surface-temperature anomaly (SST) patterns could significantly modulate the impact of ENSO phenomena: the impact of warm-phase ENSO, relative to the atmospheric model intercomparison project (AMIP) climatology, seems stronger when embedded in global and regional SSTA patterns representative of the post-1970 conditions [i.e. with temperatures warmer (colder) than the long-term mean in the southern hemisphere (northern hemisphere)]. Atlantic SSTAs may also play a significant role.

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Generation of gravity waves from thermal tides in the Venus atmosphere

Nature Communications ◽

10.1038/s41467-021-24002-1 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Norihiko Sugimoto ◽

Yukiko Fujisawa ◽

Hiroki Kashimura ◽

Katsuyuki Noguchi ◽

Takeshi Kuroda ◽

...

Keyword(s):

Gravity Waves ◽

General Circulation ◽

Three Dimensional ◽

Circulation Model ◽

Cloud Layer ◽

Dimensional Structure ◽

Wave Radiation ◽

Small Scale ◽

Thermal Tides ◽

Venus Atmosphere

AbstractGravity waves play essential roles in the terrestrial atmosphere because they propagate far from source regions and transport momentum and energy globally. Gravity waves are also observed in the Venus atmosphere, but their characteristics have been poorly understood. Here we demonstrate activities of small-scale gravity waves using a high-resolution Venus general circulation model with less than 20 and 0.25 km in the horizontal and vertical grid intervals, respectively. We find spontaneous gravity wave radiation from nearly balanced flows. In the upper cloud layer (~70 km), the thermal tides in the super-rotation are primary sources of small-scale gravity waves in the low-latitudes. Baroclinic/barotropic waves are also essential sources in the mid- and high-latitudes. The small-scale gravity waves affect the three-dimensional structure of the super-rotation and contribute to material mixing through their breaking processes. They propagate vertically and transport momentum globally, which decelerates the super-rotation in the upper cloud layer (~70 km) and accelerates it above ~80 km.

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