Ice Sheets and the Anthropocene

Wolff, E. W. (2014) Ice Sheets and the Anthropocene. Geological Society, London, Special Publications, 395 (1). pp. 255-263. ISSN 0305-8719 DOI 10.1144/SP395.10

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Abstract

Ice could play a role in identifying and defining the Anthropocene. The recurrence of northern hemisphere glaciation and the stability of the Greenland Ice Sheet are both potentially vulnerable to human impact on the environment. However, only a very long hiatus in either would be unusual in the context of the Quaternary Period, requiring the definition of a geological boundary. Human influence can clearly be discerned in several ice-core measurements. These include a sharp boundary in radioactivity due to atmospheric nuclear testing; increases, unprecedented at least in the Holocene, in Greenland concentrations of sulphate, nitrate and metals such as lead; the appearance in ice-core air bubbles of previously undetectable compounds such as SF6; and the rise, unprecedented in the last 800 ka, in concentrations of carbon dioxide and methane. Some combination of these changes could be used by future generations to clearly identify the onset of a new epoch defined at a particular calendar date. However, it is not yet clear what the character of the fully developed Anthropocene will be, and it might be wise to let future generations decide, with hindsight, when the Anthropocene started, acknowledging only that we are in the transition towards it.

Item Type:	Article
Additional Information:	© The Authors 2014
Uncontrolled Keywords:	2014AREP; IA67; BAS,
Subjects:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions:	01 - Climate Change and Earth-Ocean Atmosphere Systems 07 - Gold Open Access
Journal or Publication Title:	Geological Society, London, Special Publications
Volume:	395
Page Range:	pp. 255-263
Identification Number:	10.1144/SP395.10
Depositing User:	Sarah Humbert
Date Deposited:	23 May 2014 11:14
Last Modified:	09 Jun 2014 09:00
URI:	http://eprints.esc.cam.ac.uk/id/eprint/3055

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