What is it about?
This work uses a 1-D process-based lake biogeochemical model with several geographic databases to estimate methane emission from arctic lakes. And driven by CMIP5 future scenarios, we also estimate that how this source will respond to global warming.
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Why is it important?
It is the first time to estimate a possibly important methane source in the arctic with a process-based lake model. The work supports the claim that this source cannot be neglected in the methane inventory. It also shows that methane emissions from arctic lakes could increase to the two times large by the end of this century.
Perspectives
As shown in the publication, more efforts should be made to study this source. For example, more flux measurements should be made in different types of arctic lakes and the data should be available publicly for modelers to constrain their models. In addition, the integration of both satellite methane observations and biogeochemical model simulations in an inversion framework could be an direction to further constrain the estimates here.
Dr Zeli Tan
Purdue University
Read the Original
This page is a summary of: Arctic lakes are continuous methane sources to the atmosphere under warming conditions, Environmental Research Letters, May 2015, Institute of Physics Publishing,
DOI: 10.1088/1748-9326/10/5/054016.
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