CAREER: Extreme climate perturbations by meteorite impacts and volcanism on terrestrial planets

职业：陨石撞击和类地行星火山活动造成的极端气候扰动

• 批准号: 1847120
• 负责人: Robin Wordsworth
• 金额: $ 49.85万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1847120&HistoricalAwards=false
• 关键词: CAREER; Extreme; climate; perturbations; meteorite

Earth is still the only planet known to harbor life at the present. Mars, our best studied neighbor in the Solar System, is known to have been habitable intermittently in the past. The work proposed here will shed light on the processes that have shaped the two planets. Both Earth and Mars have undergone volcanism and giant impacts. There is evidence that Mars had surface liquid water at a time when it was very cold but impacts and volcanic events (both of which could affect the temperature) were extremely common. The project will work to explain the effects of these two processes simultaneously, rather than separately. The investigator will use computer models to create a wide range of possible outcomes for varying levels of volcanic and impact activity. The results will be useful to terrestrial exoplanet studies as well as to the Solar System. The investigator will build and expand upon an outreach program to children 5-7 years old that he has begun in the Cambridge, MA, area. He works with teachers to present age-appropriate activities in astronomy and planetary science, and he will involve his students to give them experience interacting with the public. The proposed program will address three key problems in impact/volcano climate forcing in the Solar System. The role of impacts on Mars in early episodes of fluvial erosion 3-4 Ga will be considered. On Earth, the effect of the eruptions that may have triggered an important Snowball event will be studied. Finally, he will use the insight gained from these case studies to make general predictions about extreme perturbations in climate for any terrestrial planet, including exoplanets. He will use state-of-the-art modeling tools, starting with 1D circulation models and working up to 3D models.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球仍然是目前已知的唯一有生命存在的星球。火星，我们在太阳系中研究得最好的邻居，在过去曾间歇性地适合居住。这里提出的工作将阐明形成这两颗行星的过程。地球和火星都经历了火山活动和巨大的撞击。有证据表明，在火星非常寒冷的时期，火星表面有液态水，但撞击和火山事件（两者都可能影响温度）极为常见。该项目将同时解释这两个过程的影响，而不是分别解释。研究人员将利用计算机模型，根据火山和撞击活动的不同程度，得出一系列可能的结果。这些结果将对类地系外行星的研究以及太阳系的研究都很有用。调查员将建立并扩展他在马萨诸塞州剑桥地区开始的一项针对5-7岁儿童的外展计划。他与老师们合作，在天文学和行星科学方面展示适合他们年龄的活动，他将让学生们参与其中，让他们体验与公众互动的经历。拟议的计划将解决太阳系中撞击/火山气候强迫的三个关键问题。将考虑在3-4 Ga河流侵蚀的早期阶段对火星的影响。在地球上，可能引发重要雪球事件的火山爆发的影响将被研究。最后，他将利用从这些案例研究中获得的见解，对任何类地行星（包括系外行星）的极端气候扰动做出一般预测。他将使用最先进的建模工具，从1D循环模型开始，直到3D模型。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Consequences of Proposed Shoreline Deformation Scenarios for Jezero Crater, Mars

火星杰泽罗陨石坑拟议海岸线变形情景的后果

• DOI: 10.3847/psj/ac01de
• 发表时间: 2021
• 期刊: The Planetary Science Journal
• 作者: Baum, Mark;Wordsworth, Robin;Goudge, Timothy A.
• 通讯作者: Goudge, Timothy A.

Atmospheres of Rocky Exoplanets

岩石系外行星的大气层

• DOI: 10.1146/annurev-astro-052920-125632
• 发表时间: 2022
• 期刊: Annual Review of Astronomy and Astrophysics
• 影响因子: 33.3
• 作者: Wordsworth, Robin;Kreidberg, Laura
• 通讯作者: Kreidberg, Laura

Episodic deluges in simulated hothouse climates

模拟温室气候中的间歇性洪水

• DOI: 10.1038/s41586-021-03919-z
• 发表时间: 2021
• 期刊: Nature
• 影响因子: 64.8
• 作者: Seeley, Jacob T.;Wordsworth, Robin D.
• 通讯作者: Wordsworth, Robin D.

A coupled model of episodic warming, oxidation and geochemical transitions on early Mars

• DOI: 10.1038/s41561-021-00701-8
• 发表时间: 2021-03-01
• 期刊: NATURE GEOSCIENCE
• 影响因子: 18.3
• 作者: Wordsworth, Robin;Knoll, Andrew H.;Steakley, Kathryn
• 通讯作者: Steakley, Kathryn

The Physics of Falling Raindrops in Diverse Planetary Atmospheres

不同行星大气中下落雨滴的物理学

• DOI: 10.1029/2020je006653
• 发表时间: 2021
• 期刊: Journal of Geophysical Research: Planets
• 作者: Loftus, Kaitlyn;Wordsworth, Robin D.
• 通讯作者: Wordsworth, Robin D.