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Multiple Ecosystem ...
Multiple Ecosystem Effects of Extreme Weather Events in the Arctic
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- Christensen, T. R. (author)
- Aarhus University
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- Lund, M. (author)
- Aarhus University
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- Skov, K. (author)
- Aarhus University,University of Copenhagen
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- Abermann, J. (author)
- Asiaq Greenland Survey,Karl-Franzens-University of Graz
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- López-Blanco, E. (author)
- Aarhus University
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- Scheller, J. (author)
- Aarhus University
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- Scheel, M. (author)
- Aarhus University
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- Jackowicz-Korczynski, M. (author)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Aarhus University
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- Langley, K. (author)
- Asiaq Greenland Survey
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- Murphy, M. J. (author)
- University College London
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- Mastepanov, M. (author)
- University of Oulu,Aarhus University
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(creator_code:org_t)
- 2020-05-18
- 2021
- English.
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In: Ecosystems. - : Springer Science and Business Media LLC. - 1432-9840 .- 1435-0629. ; 24:1, s. 122-136
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Abstract
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- The Arctic is getting warmer and wetter. Here, we document two independent examples of how associated extreme precipitation patterns have severe implications for high Arctic ecosystems. The events stand out in a 23-year record of continuous observations of a wide range of ecosystem parameters and act as an early indication of conditions projected to increase in the future. In NE Greenland, August 2015, one-quarter of the average annual precipitation fell during a 9-day intensive rain event. This ranked number one for daily sums during the 1996–2018 period and caused a strong and prolonged reduction in solar radiation decreasing CO2 uptake in the order of 18–23 g C m−2, a reduction comparable to typical annual C budgets in Arctic tundra. In a different type of event, but also due to changed weather patterns, an extreme snow melt season in 2018 triggered a dramatic gully thermokarst causing rapid transformation in ecosystem functioning from consistent annual ecosystem CO2 uptake and low methane exchange to highly elevated methane release, net source of CO2, and substantial export of organic carbon downstream as riverine and coastal input. In addition to climate warming alone, more frequent occurrence of extreme weather patterns will have large implications for otherwise undisturbed tundra ecosystems including their element transport and carbon interactions with the atmosphere and ocean.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Arctic ecosystems
- climate change
- ecosystem impacts
- extreme events
- long-term observations
Publication and Content Type
- art (subject category)
- ref (subject category)
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Ecosystems
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- By the author/editor
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Christensen, T. ...
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Lund, M.
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Skov, K.
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Abermann, J.
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López-Blanco, E.
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Scheller, J.
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show more...
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Scheel, M.
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Jackowicz-Korczy ...
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Langley, K.
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Murphy, M. J.
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Mastepanov, M.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
- Articles in the publication
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Ecosystems
- By the university
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Lund University