Rising methane emissions from northern wetlands associated with sea ice decline

Geophysical Research Letters
By: , and 

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Abstract

The Arctic is rapidly transitioning toward a seasonal sea ice-free state, perhaps one of the most apparent examples of climate change in the world. This dramatic change has numerous consequences, including a large increase in air temperatures, which in turn may affect terrestrial methane emissions. Nonetheless, terrestrial and marine environments are seldom jointly analyzed. By comparing satellite observations of Arctic sea ice concentrations to methane emissions simulated by three process-based biogeochemical models, this study shows that rising wetland methane emissions are associated with sea ice retreat. Our analyses indicate that simulated high-latitude emissions for 2005–2010 were, on average, 1.7 Tg CH4 yr−1 higher compared to 1981–1990 due to a sea ice-induced, autumn-focused, warming. Since these results suggest a continued rise in methane emissions with future sea ice decline, observation programs need to include measurements during the autumn to further investigate the impact of this spatial connection on terrestrial methane emissions.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Rising methane emissions from northern wetlands associated with sea ice decline
Series title Geophysical Research Letters
DOI 10.1002/2015GL065013
Volume 42
Issue 17
Year Published 2015
Language English
Publisher Wiley
Contributing office(s) Coop Res Unit Seattle
Description 9 p.
First page 7214
Last page 7222
Online Only (Y/N) N
Additional Online Files (Y/N) N