Статья

Was Venus the first habitable world of our solar system?

M. J. WayDepartment of Astronomy and Space Physics Uppsala University Uppsala SwedenAnthony D. Del GenioNASA Goddard Institute for Space Studies New York New York USANancy Y. KiangNASA Goddard Institute for Space Studies New York New York USALinda E. SohlCenter for Climate Systems Research Columbia University New York New York USADavid H. GrinspoonPlanetary Science Institute Tucson Arizona USAIgor AleinovCenter for Climate Systems Research Columbia University New York New York USAMaxwell KelleyNASA Goddard Institute for Space Studies New York New York USAThomas CluneGlobal Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt Maryland USA

2016en

ABI

Аннотация

Present-day Venus is an inhospitable place with surface temperatures approaching 750K and an atmosphere 90 times as thick as Earth's. Billions of years ago the picture may have been very different. We have created a suite of 3-D climate simulations using topographic data from the Magellan mission, solar spectral irradiance estimates for 2.9 and 0.715 Gya, present-day Venus orbital parameters, an ocean volume consistent with current theory, and an atmospheric composition estimated for early Venus. Using these parameters we find that such a world could have had moderate temperatures if Venus had a rotation period slower than ~16 Earth days, despite an incident solar flux 46-70% higher than Earth receives. At its current rotation period, Venus's climate could have remained habitable until at least 715 million years ago. These results demonstrate the role rotation and topography play in understanding the climatic history of Venus-like exoplanets discovered in the present epoch.

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Идентификаторы

DOI: 10.1002/2016gl069790

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar