Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064
Vegetation changes, such as shrub encroachment and wetland expansion, have been observed in many Arctic tundra regions. These changes feed back to permafrost and climate. Permafrost can be protected by soil shading through vegetation as it reduces the amount of solar energy available for thawing. Re...
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ftdatacite:10.1594/pangaea.860561 2023-05-15T13:03:34+02:00 Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 Juszak, Inge Eugster, Werner Heijmans, Monique MPD Schaepman-Strub, Gabriela 2016 application/zip https://dx.doi.org/10.1594/pangaea.860561 https://doi.pangaea.de/10.1594/PANGAEA.860561 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.5194/bg-13-4049-2016 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2016 ftdatacite https://doi.org/10.1594/pangaea.860561 https://doi.org/10.5194/bg-13-4049-2016 2022-02-09T13:17:17Z Vegetation changes, such as shrub encroachment and wetland expansion, have been observed in many Arctic tundra regions. These changes feed back to permafrost and climate. Permafrost can be protected by soil shading through vegetation as it reduces the amount of solar energy available for thawing. Regional climate can be affected by a reduction in surface albedo as more energy is available for atmospheric and soil heating. Here, we compared the shortwave radiation budget of two common Arctic tundra vegetation types dominated by dwarf shrubs (Betula nana) and wet sedges (Eriophorum angustifolium) in North-East Siberia. We measured time series of the shortwave and longwave radiation budget above the canopy and transmitted radiation below the canopy. Additionally, we quantified soil temperature and heat flux as well as active layer thickness. The mean growing season albedo of dwarf shrubs was 0.15 ± 0.01, for sedges it was higher (0.17 ± 0.02). Dwarf shrub transmittance was 0.36 ± 0.07 on average, and sedge transmittance was 0.28 ± 0.08. The standing dead leaves contributed strongly to the soil shading of wet sedges. Despite a lower albedo and less soil shading, the soil below dwarf shrubs conducted less heat resulting in a 17 cm shallower active layer as compared to sedges. This result was supported by additional, spatially distributed measurements of both vegetation types. Clouds were a major influencing factor for albedo and transmittance, particularly in sedge vegetation. Cloud cover reduced the albedo by 0.01 in dwarf shrubs and by 0.03 in sedges, while transmittance was increased by 0.08 and 0.10 in dwarf shrubs and sedges, respectively. Our results suggest that the observed deeper active layer below wet sedges is not primarily a result of the summer canopy radiation budget. Soil properties, such as soil albedo, moisture, and thermal conductivity, may be more influential, at least in our comparison between dwarf shrub vegetation on relatively dry patches and sedge vegetation with higher soil moisture. : Correspondence to: Inge Juszak (mailto:inge.juszak@gmx.de) Article in Journal/Newspaper Active layer thickness albedo Arctic Betula nana Eriophorum permafrost Tundra Siberia DataCite Metadata Store (German National Library of Science and Technology) Arctic Monique ENVELOPE(70.250,70.250,-49.517,-49.517) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Vegetation changes, such as shrub encroachment and wetland expansion, have been observed in many Arctic tundra regions. These changes feed back to permafrost and climate. Permafrost can be protected by soil shading through vegetation as it reduces the amount of solar energy available for thawing. Regional climate can be affected by a reduction in surface albedo as more energy is available for atmospheric and soil heating. Here, we compared the shortwave radiation budget of two common Arctic tundra vegetation types dominated by dwarf shrubs (Betula nana) and wet sedges (Eriophorum angustifolium) in North-East Siberia. We measured time series of the shortwave and longwave radiation budget above the canopy and transmitted radiation below the canopy. Additionally, we quantified soil temperature and heat flux as well as active layer thickness. The mean growing season albedo of dwarf shrubs was 0.15 ± 0.01, for sedges it was higher (0.17 ± 0.02). Dwarf shrub transmittance was 0.36 ± 0.07 on average, and sedge transmittance was 0.28 ± 0.08. The standing dead leaves contributed strongly to the soil shading of wet sedges. Despite a lower albedo and less soil shading, the soil below dwarf shrubs conducted less heat resulting in a 17 cm shallower active layer as compared to sedges. This result was supported by additional, spatially distributed measurements of both vegetation types. Clouds were a major influencing factor for albedo and transmittance, particularly in sedge vegetation. Cloud cover reduced the albedo by 0.01 in dwarf shrubs and by 0.03 in sedges, while transmittance was increased by 0.08 and 0.10 in dwarf shrubs and sedges, respectively. Our results suggest that the observed deeper active layer below wet sedges is not primarily a result of the summer canopy radiation budget. Soil properties, such as soil albedo, moisture, and thermal conductivity, may be more influential, at least in our comparison between dwarf shrub vegetation on relatively dry patches and sedge vegetation with higher soil moisture. : Correspondence to: Inge Juszak (mailto:inge.juszak@gmx.de) |
format |
Article in Journal/Newspaper |
author |
Juszak, Inge Eugster, Werner Heijmans, Monique MPD Schaepman-Strub, Gabriela |
spellingShingle |
Juszak, Inge Eugster, Werner Heijmans, Monique MPD Schaepman-Strub, Gabriela Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
author_facet |
Juszak, Inge Eugster, Werner Heijmans, Monique MPD Schaepman-Strub, Gabriela |
author_sort |
Juszak, Inge |
title |
Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
title_short |
Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
title_full |
Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
title_fullStr |
Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
title_full_unstemmed |
Radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in Kytalyk, NE Siberia, supplement to: Juszak, Inge; Eugster, Werner; Heijmans, Monique MPD; Schaepman-Strub, Gabriela (2016): Contrasting radiation and soil heat fluxes in Arctic shrub and wet sedge tundra. Biogeosciences, 13(13), 4049-4064 |
title_sort |
radiation fluxes, soil heat flux, air temperature, soil temperature, soil moisture and vegetation at dwarf shrubs and wet sedges in kytalyk, ne siberia, supplement to: juszak, inge; eugster, werner; heijmans, monique mpd; schaepman-strub, gabriela (2016): contrasting radiation and soil heat fluxes in arctic shrub and wet sedge tundra. biogeosciences, 13(13), 4049-4064 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2016 |
url |
https://dx.doi.org/10.1594/pangaea.860561 https://doi.pangaea.de/10.1594/PANGAEA.860561 |
long_lat |
ENVELOPE(70.250,70.250,-49.517,-49.517) |
geographic |
Arctic Monique |
geographic_facet |
Arctic Monique |
genre |
Active layer thickness albedo Arctic Betula nana Eriophorum permafrost Tundra Siberia |
genre_facet |
Active layer thickness albedo Arctic Betula nana Eriophorum permafrost Tundra Siberia |
op_relation |
https://dx.doi.org/10.5194/bg-13-4049-2016 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.860561 https://doi.org/10.5194/bg-13-4049-2016 |
_version_ |
1766339863070638080 |