Seasonal Water 'Pump' in the Atmosphere of Mars: Vertical Transport to the Thermosphere
| Autor: | Alexander Rodin, Dmitry S. Shaposhnikov, Paul Hartogh, Alexander S. Medvedev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
010504 meteorology & atmospheric sciences Northern Hemisphere FOS: Physical sciences Storm Zonal and meridional Atmosphere of Mars 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Space Physics (physics.space-ph) Geophysics (physics.geo-ph) Physics - Geophysics Geophysics Physics - Space Physics General Earth and Planetary Sciences Environmental science Water cycle Thermosphere Southern Hemisphere Water vapor 0105 earth and related environmental sciences Astrophysics - Earth and Planetary Astrophysics |
| Popis: | We present results of simulations with the Max Planck Institute general circulation model (MPI-MGCM) implementing a hydrological cycle scheme. The simulations reveal a seasonal water "pump" mechanism responsible for the upward transport of water vapor. This mechanism occurs in high latitudes above 60$^\circ$ of the southern hemisphere at perihelion, when the upward branch of the meridional circulation is particularly strong. A combination of the mean vertical flux with variations induced by solar tides facilitates penetration of water across the "bottleneck" at approximately 60 km. The meridional circulation then transports water across the globe to the northern hemisphere. Since the intensity of the meridional cell is tightly controlled by airborne dust, the water abundance in the thermosphere strongly increases during dust storms. 15 pages, 4 figures |
| Databáze: | OpenAIRE |
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