气候变化领域集成服务门户(CCPortal): Evidence for a hot start and early ocean formation on Pluto

CCPortal

DOI	10.1038/s41561-020-0595-0
	Evidence for a hot start and early ocean formation on Pluto
	Bierson C.J.; Nimmo F.; Stern S.A.
发表日期	2020
ISSN	17520894
起始页码	468
结束页码	472
卷号	13 期号:7
英文摘要	Pluto is thought to possess a present-day ocean beneath a thick ice shell. It has generally been assumed that Pluto accreted from cold material and then later developed its ocean due to warming from radioactive decay; in this ‘cold start’ scenario, the ice shell would have experienced early compression and more recent extension. Here we compare thermal model simulations with geological observations from the New Horizons mission to suggest that Pluto was instead relatively hot when it formed, with an early subsurface ocean. Such a ‘hot start’ Pluto produces an early, rapid phase of extension, followed by a more prolonged extensional phase, which totals ~0.5% linear strain over the last 3.5 Gyr. The amount of second-phase extension is consistent with that inferred from extensional faults on Pluto; we suggest that an enigmatic ridge–trough system recently identified on Pluto is indicative of early extensional tectonics. A hot initial start can be achieved with the gravitational energy released during accretion if the final stage of Pluto’s accretion is rapid (<30 kyr). A fast final stage of growth is in agreement with models of the formation of Kuiper belt objects via gravitational collapse followed by pebble accretion, and implies that early oceans may have been common in the interiors of large Kuiper belt objects. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	accretion; ice ridge; numerical model; Pluto; radioactive decay; subsurface flow; tectonics; trough; warming
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206748
作者单位	Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA, United States; Southwest Research Institute, Boulder, CO, United States
推荐引用方式 GB/T 7714	Bierson C.J.,Nimmo F.,Stern S.A.. Evidence for a hot start and early ocean formation on Pluto[J],2020,13(7).
APA	Bierson C.J.,Nimmo F.,&Stern S.A..(2020).Evidence for a hot start and early ocean formation on Pluto.Nature Geoscience,13(7).
MLA	Bierson C.J.,et al."Evidence for a hot start and early ocean formation on Pluto".Nature Geoscience 13.7(2020).