globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2190
论文题名:
Transient features in a Titan sea
作者: Hofgartner J.D.; Hayes A.G.; Lunine J.I.; Zebker H.; Stiles B.W.; Sotin C.; Barnes J.W.; Turtle E.P.; Baines K.H.; Brown R.H.; Buratti B.J.; Clark R.N.; Encrenaz P.; Kirk R.D.; Le Gall A.; Lopes R.M.; Lorenz R.D.; Malaska M.J.; Mitchell K.L.; Nicholson P.D.; Paillou P.; Radebaugh J.; Wall S.D.; Wood C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:7
起始页码: 493
结束页码: 496
语种: 英语
Scopus关键词: bubble ; lake ; methane ; Northern Hemisphere ; planetary atmosphere ; radar ; satellite data ; Saturn ; shoreline change ; spacecraft ; Titan
英文摘要: Titan's surface-atmosphere system bears remarkable similarities to Earth's, the most striking being an active, global methane cycle akin to Earth's water cycle. Like the hydrological cycle of Earth, Titan's seasonal methane cycle is driven by changes in the distribution of solar energy. The Cassini spacecraft, which arrived at Saturn in 2004 in the midst of northern winter and southern summer, has observed surface changes, including shoreline recession, at Titan's south pole and equator. However, active surface processes have yet to be confirmed in the lakes and seas in Titan's north polar region. As the 2017 northern summer solstice approaches, the onset of dynamic phenomena in this region is expected. Here we present the discovery of bright features in recent Cassini RADAR data that appeared in Titan's northern sea, Ligeia Mare, in July 2013 and disappeared in subsequent observations. We suggest that these bright features are best explained by the occurrence of ephemeral phenomena such as surface waves, rising bubbles, and suspended or floating solids. We suggest that our observations are an initial glimpse of dynamic processes that are commencing in the northern lakes and seas as summer nears in the northern hemisphere. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106495
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Astronomy, Cornell University, Ithaca, NY 14853, United States; Department of Electrical Engineering, Stanford University, Stanford, CA 94305-2215, United States; Jet Propulsion Laboratory, Pasadena, CA 91109, United States; Department of Physics, University of Idaho, Moscow, ID 83844-0903, United States; JHU Applied Physics Lab, Laurel, MD 20723, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, United States; USGS Denver Federal Center, Denver, CO 80225-0046, United States; Observatoire de Paris, Paris 75014, France; USGS Astrogeology Center, Flagstaff, AZ 86001, United States; LATMOS-UVSQ, Paris 78280, France; University of Bordeaux, Bordeaux 33271, France; Department of Geological Sciences, Brigham Young University, Provo, UT 84602, United States; Planetary Science Institute, Tucson, AZ 85721, United States

Recommended Citation:
Hofgartner J.D.,Hayes A.G.,Lunine J.I.,et al. Transient features in a Titan sea[J]. Nature Geoscience,2014-01-01,7(7)
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