Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018.
Dramatic increases in air temperature and precipitation are occurring in the High Arctic (70 °North), yet few studies have characterized the long-term responses of High Arctic ecosystems to the interactive effects of experimental warming and increased rain. Beginning in 2003, we applied a factorial...
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2022
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dataone:doi:10.18739/A2KH0F09B 2024-06-03T18:46:38+00:00 Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. Robert Jespersen Jeffrey Welker Maria Vaisanen A. Joshua Leffler Thule Air Base, NW Greenland ENVELOPE(-68.0,-68.0,76.0,76.0) BEGINDATE: 2018-01-01T00:00:00Z ENDDATE: 2018-01-01T00:00:00Z 2022-01-01T00:00:00Z https://doi.org/10.18739/A2KH0F09B unknown Arctic Data Center CO2 flux ecosystem carbon vegetation change stable isotopes tundra polar semi-desert Salix arctica Dryas integrifolia Carex rupestris arctica integrifolia rupestris Dataset 2022 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2KH0F09B 2024-06-03T18:18:20Z Dramatic increases in air temperature and precipitation are occurring in the High Arctic (70 °North), yet few studies have characterized the long-term responses of High Arctic ecosystems to the interactive effects of experimental warming and increased rain. Beginning in 2003, we applied a factorial summer warming and wetting experiment to a polar semidesert in northwest Greenland. Twenty-four 0.8 × 1 meter (m) experimental plots were established in three homogenous 70 m × 60 m areas. Plots were assigned to one of four different climate treatments: low-level warming (T1), high-level warming (T2), wetting (W), combined warming and wetting (T2W), and unmanipulated control (CTL). In summer 2018, we assessed several metrics of ecosystem structure and function, including plant cover, ecosystem carbon dioxide exchange, aboveground (leaf, stem) and belowground (litter, root, soil) carbon (C) and nitrogen (N) concentrations (%) and pools, as well as leaf and soil stable isotopes (δ13C and δ15N). Plant cover was assessed via the point-frame technique in 2003 and a digital "point-frame" in 2018. Ecosystem carbon dioxide exchange was assessed at 15-minute intervals with the chamber technique. To assess ecosystem structure we removed 20x20 centimeter turfs, dried them in the lab, and sorted and analyzed all components (i.e. stems, leaves, roots, soils) for C and N content. Leaf ecophysiology was assessed by clipping fully developed green leaves and analyzing their C, N, δ13C, and δ15N content. Dataset Arctic Greenland Thule Air Thule Air Base Thule Tundra Arctic Data Center (via DataONE) Arctic Greenland Thule Air Base ENVELOPE(-68.703,-68.703,76.531,76.531) ENVELOPE(-68.0,-68.0,76.0,76.0) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
CO2 flux ecosystem carbon vegetation change stable isotopes tundra polar semi-desert Salix arctica Dryas integrifolia Carex rupestris arctica integrifolia rupestris |
spellingShingle |
CO2 flux ecosystem carbon vegetation change stable isotopes tundra polar semi-desert Salix arctica Dryas integrifolia Carex rupestris arctica integrifolia rupestris Robert Jespersen Jeffrey Welker Maria Vaisanen A. Joshua Leffler Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
topic_facet |
CO2 flux ecosystem carbon vegetation change stable isotopes tundra polar semi-desert Salix arctica Dryas integrifolia Carex rupestris arctica integrifolia rupestris |
description |
Dramatic increases in air temperature and precipitation are occurring in the High Arctic (70 °North), yet few studies have characterized the long-term responses of High Arctic ecosystems to the interactive effects of experimental warming and increased rain. Beginning in 2003, we applied a factorial summer warming and wetting experiment to a polar semidesert in northwest Greenland. Twenty-four 0.8 × 1 meter (m) experimental plots were established in three homogenous 70 m × 60 m areas. Plots were assigned to one of four different climate treatments: low-level warming (T1), high-level warming (T2), wetting (W), combined warming and wetting (T2W), and unmanipulated control (CTL). In summer 2018, we assessed several metrics of ecosystem structure and function, including plant cover, ecosystem carbon dioxide exchange, aboveground (leaf, stem) and belowground (litter, root, soil) carbon (C) and nitrogen (N) concentrations (%) and pools, as well as leaf and soil stable isotopes (δ13C and δ15N). Plant cover was assessed via the point-frame technique in 2003 and a digital "point-frame" in 2018. Ecosystem carbon dioxide exchange was assessed at 15-minute intervals with the chamber technique. To assess ecosystem structure we removed 20x20 centimeter turfs, dried them in the lab, and sorted and analyzed all components (i.e. stems, leaves, roots, soils) for C and N content. Leaf ecophysiology was assessed by clipping fully developed green leaves and analyzing their C, N, δ13C, and δ15N content. |
format |
Dataset |
author |
Robert Jespersen Jeffrey Welker Maria Vaisanen A. Joshua Leffler |
author_facet |
Robert Jespersen Jeffrey Welker Maria Vaisanen A. Joshua Leffler |
author_sort |
Robert Jespersen |
title |
Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
title_short |
Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
title_full |
Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
title_fullStr |
Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
title_full_unstemmed |
Polar semidesert responses to long-term experimental warming and wetting, Thule, Northwest Greenland, 2018. |
title_sort |
polar semidesert responses to long-term experimental warming and wetting, thule, northwest greenland, 2018. |
publisher |
Arctic Data Center |
publishDate |
2022 |
url |
https://doi.org/10.18739/A2KH0F09B |
op_coverage |
Thule Air Base, NW Greenland ENVELOPE(-68.0,-68.0,76.0,76.0) BEGINDATE: 2018-01-01T00:00:00Z ENDDATE: 2018-01-01T00:00:00Z |
long_lat |
ENVELOPE(-68.703,-68.703,76.531,76.531) ENVELOPE(-68.0,-68.0,76.0,76.0) |
geographic |
Arctic Greenland Thule Air Base |
geographic_facet |
Arctic Greenland Thule Air Base |
genre |
Arctic Greenland Thule Air Thule Air Base Thule Tundra |
genre_facet |
Arctic Greenland Thule Air Thule Air Base Thule Tundra |
op_doi |
https://doi.org/10.18739/A2KH0F09B |
_version_ |
1800869036351815680 |