期刊
ICARUS
卷 231, 期 -, 页码 1-12出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2013.11.030
关键词
Titan, atmosphere; Titan, hydrology; Atmospheres, composition; Atmospheres, structure; Radio observations
资金
- DFG
The global distribution of atmospheric pressure retrieved from Cassini radio occultations is reanalyzed and interpreted in a meteorological context. The retrieval of Titan's atmospheric pressure profile from radio occultations is ambiguous because it depends on the methane mole fraction, which is not precisely known in the troposphere beyond the entry site of the Huygens Probe. The surface pressure at the geoid level in late northern winter decreases from south pole to north pole by similar to 15 hPa (1% of the surface pressure) if the data are retrieved under the assumption of a globally uniform methane distribution. However, this surface pressure distribution is inconsistent with the timing and location of observed convective clouds, surface wind direction and general circulation model prediction. A more realistic pressure distribution with a slight increase from the summer hemisphere to the winter hemisphere can be obtained if one assumes a substantially higher methane abundance in the southern (summer) hemisphere than in the northern (winter) hemisphere in the previous season. (c) 2013 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据