Exploring Climate with Obliquity in a Variable-eccentricity Earth-like World

被引：1

作者：

Way, M. J. ^{[1
,2
,3
]}

Georgakarakos, Nikolaos ^{[4
,5
]}

Clune, Thomas L. ^{[6
]}

机构：

[1] NASA Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA

[2] NASA Goddard Space Flight Ctr, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD 20771 USA

[3] Uppsala Univ, Dept Phys & Astron, Theoret Astrophys, SE-75120 Uppsala, Sweden

[4] New York Univ Abu Dhabi, Div Sci, POB 129188, Abu Dhabi, U Arab Emirates

[5] New York Univ Abu Dhabi, Ctr Astrophys & Space Sci CASS, POB 129188, Abu Dhabi, U Arab Emirates

[6] NASA Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA

来源：

ASTRONOMICAL JOURNAL | 2023年 / 166卷 / 06期

关键词：

HABITABLE-ZONE; SIZED PLANET; EXOPLANETS; EVOLUTION; DYNAMICS; SYSTEMS; STARS; DWARF; MODEL;

D O I：

10.3847/1538-3881/ad0373

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Exploring planetary systems similar to our solar system can provide a means to explore a large range of possibly temperate climates on Earth-like worlds. Rather than run hundreds of simulations with different eccentricities at fixed obliquities, our variable-eccentricity approach provides a means to cover an incredibly large parameter space. Herein Jupiter's orbital radius is moved substantially inward in two different scenarios, causing a forcing on Earth's eccentricity. In one case, the eccentricity of Earth varies from 0 to 0.27 over similar to 7000 yr for three different fixed obliquities (0 degrees, 23 degrees, and 45 degrees). In another case, the eccentricity varies from 0 to 0.53 over similar to 9400 yr in a single case with zero obliquity. In all cases, we find that the climate remains stable, but regional habitability changes through time in unique ways. At the same time, the moist greenhouse state is approached but only when at the highest eccentricities.

引用

页数：10

共 37 条

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