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Titan: Exploring planetary atmospheres and climate with infra-red spectroscopy

泰坦：用红外光谱探索行星大气和气候

基本信息

批准号：
1943284
负责人：
金额：
--
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1943284
关键词：
Titan Exploring planetary atmospheres climate

项目摘要

Titan is Saturn's largest moon and is the only moon in our Solar System to have a substantial atmosphere - composed of nitrogen, methane, and a vast array of photochemically produced organic compounds. Titan has many similar atmospheric processes to the Earth, such as clouds, rain, global meridional circulation, and polar vortices. Titan thus provides the best example of an Earth-like planet in the cold outer Solar System and a unique test case for our understanding of atmospheric physics under different conditions.This project will study aspects of Titan's complex atmosphere based on infrared spectra, primarily observed by NASA's Cassini spacecraft. Cassini has been returning data from the Saturn system since July 2004 and will complete its mission in 2017 by plummeting into Saturn. This will leave a 13 year dataset, which will give exceptional spatial and temporal coverage of Titan's atmosphere during almost half a Saturnian year (29.5 years long).The project will focus on data from Cassini's Composite InfraRed Spectrometer (CIRS), Visual and Infrared Mapping Spectrometer (VIMS), and Imaging Science Sub-system (ISS). These instruments are sensitive to stratospheric composition/temperature, tropospheric composition/clouds, and hazes. Additional data from the Herschel space telescope and the Atacama Large Millimeter Array (ALMA) could also be used, with the potential for James Webb Space Telescope data later in the project.

泰坦是土星最大的卫星，也是太阳系中唯一拥有大气层的卫星，大气层由氮气、甲烷和大量光化学产生的有机化合物组成。土卫六有许多与地球相似的大气过程，如云、雨、全球经向环流和极涡。因此，土卫六为寒冷的外太阳系中的类地行星提供了最好的例子，并为我们了解不同条件下的大气物理提供了一个独特的测试案例。该项目将基于红外光谱研究土卫六复杂大气的各个方面，主要由美国宇航局的卡西尼号航天器观测到。卡西尼号自 2004 年 7 月以来一直从土星系统传回数据，并将于 2017 年坠入土星完成其任务。这将留下一个为期 13 年的数据集，该数据集将在近半个土星年（长达 29.5 年）内提供土卫六大气层的特殊空间和时间覆盖。该项目将重点关注来自卡西尼号复合红外光谱仪 (CIRS)、视觉和红外测绘光谱仪 (VIMS) 以及成像科学子系统 (ISS) 的数据。这些仪器对平流层成分/温度、对流层成分/云和霾敏感。还可以使用来自赫歇尔太空望远镜和阿塔卡马大型毫米波阵列（ALMA）的附加数据，并有可能在项目后期使用詹姆斯·韦伯太空望远镜的数据。