Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Nov 1;16(11):873–899. doi: 10.1089/ast.2015.1422

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© Giada Arney et al., 2016; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons Attribution Noncommercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

PMC Copyright notice

FIG. 4. — Mean surface temperatures as a function of CH₄ for Archean Cases A–D. The dashed blue line shows the freezing point of water (273 K), and the dashed orange line marks our lower threshold of habitability (248 K) for an equatorial ocean belt (Charnay et al., 2013). The X in each panel indicates the initiation of haze-induced cooling.