Advanced

Multiple Ecosystem Effects of Extreme Weather Events in the Arctic

Christensen, T. R. LU ; Lund, M. LU ; Skov, K. ; Abermann, J. ; López-Blanco, E. ; Scheller, J. ; Scheel, M. ; Jackowicz-Korczynski, M. LU ; Langley, K. and Murphy, M. J. , et al. (2020) In Ecosystems
Abstract

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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Arctic ecosystems, climate change, ecosystem impacts, extreme events, long-term observations
in
Ecosystems
publisher
Springer
external identifiers
  • scopus:85085331208
ISSN
1432-9840
DOI
10.1007/s10021-020-00507-6
language
English
LU publication?
yes
id
46cc7255-993f-4a0e-8dca-e7e86e44f15c
date added to LUP
2020-06-16 14:50:14
date last changed
2020-12-29 03:16:13
@article{46cc7255-993f-4a0e-8dca-e7e86e44f15c,
  abstract     = {<p>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 CO<sub>2</sub> uptake in the order of 18–23 g C m<sup>−2</sup>, 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 CO<sub>2</sub> uptake and low methane exchange to highly elevated methane release, net source of CO<sub>2</sub>, 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.</p>},
  author       = {Christensen, T. R. and Lund, M. and Skov, K. and Abermann, J. and López-Blanco, E. and Scheller, J. and Scheel, M. and Jackowicz-Korczynski, M. and Langley, K. and Murphy, M. J. and Mastepanov, M.},
  issn         = {1432-9840},
  language     = {eng},
  month        = {05},
  publisher    = {Springer},
  series       = {Ecosystems},
  title        = {Multiple Ecosystem Effects of Extreme Weather Events in the Arctic},
  url          = {http://dx.doi.org/10.1007/s10021-020-00507-6},
  doi          = {10.1007/s10021-020-00507-6},
  year         = {2020},
}