Thermokarst lake dynamics on the Alaska North Slope and their influence on organic matter deposition


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Josefine.Lenz [ at ] awi.de

Abstract

Arctic regions are affected by the warming twice times faster than the global mean (Overland et al., 2017). Within the last years permafrost has rapidly thawed which is a significant issue in relation to climate change and landscape structures in arctic regions. The biggest issue of rapidly thawing permafrost are the stored carbon sources in the ground which contain a lot of methane and carbon dioxide. Thus climate change is a lot influenced by self-enforcing feedback effects which have a very high impact (Pithan et al., 2014). This study is based on 10 short sediment cores taken from thermokarst lakes on the Alaska North Slope in July and August 2018 by researchers of the Alfred Wegener Institute for Polar and Marine Research and the University of Alaska Fairbanks. The main focus of this thesis is the understanding of the dynamics of thermokarst lakes based on geochemical analyses, physical parameters and remote sensing imageries. Within this study the dynamics of thermokarst lakes were discussed and researched in relation to their decomposed organic matter content. The relation between the lake size, water depth, lake ice type and organic matter input was discussed as well. Lastly this thesis canvased the influence of salinity of organic matter input. The method of these classifications is qualitative and is handled by data tables without statistical classifiers.



Item Type
Thesis (Bachelor)
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Primary Division
Programs
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Peer revision
Not peer-reviewed
Publication Status
Published
Eprint ID
52096
Cite as
Siegert, L. (2019): Thermokarst lake dynamics on the Alaska North Slope and their influence on organic matter deposition , Bachelor thesis, Humboldt-Universität zu Berlin.


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info:eu-repo/grantAgreement/EC/FP7/338335


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