期刊
GEOPHYSICAL RESEARCH LETTERS
卷 41, 期 13, 页码 4471-4478出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GL060235
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资金
- UK Science and Technology Facilities Council
- Science and Technology Facilities Council [ST/L000776/1, 1139870] Funding Source: researchfish
- UK Space Agency [ST/I003096/1, ST/I003061/1] Funding Source: researchfish
- STFC [ST/L000776/1] Funding Source: UKRI
The radiative impact of water ice clouds on the atmosphere of Mars is analyzed via a reanalysis of Mars Climate Sounder (MCS) temperature and ice opacity profiles. Polar hood clouds only have a small radiative impact, while tropical clouds increase diurnally averaged temperatures at the 10 Pa level by similar to 10-15 K. Cloud radiative heating strengthens the meridional overturning circulation, increasing temperatures in the polar warmings by similar to 6-8 K and temperatures in the tropics by similar to 2 K (due to increased dust mass). The positions and wind speeds of the tropical and high-latitude jets are also modified through changes to the meridional temperature gradients. An effective ice particle radius of r(eff) = 1.4 mu m produces temperatures around the aphelion cloud belt in close agreement to MCS temperature retrievals. For high-altitude tropical clouds during northern autumn, a better agreement is found using r(eff) = 0.8 mu m.
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