Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands
Abstract Evapotranspiration (ET) is a key component of the water cycle, whereby accurate partitioning of ET into evaporation and transpiration provides important information about the intrinsically coupled carbon, water, and energy fluxes. Currently, global estimates of partitioned evaporative and t...
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crwiley:10.1002/eco.1975 2024-09-15T18:29:12+00:00 Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands Warren, Rebecca K. Pappas, Christoforos Helbig, Manuel Chasmer, Laura E. Berg, Aaron A. Baltzer, Jennifer L. Quinton, William L. Sonnentag, Oliver Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Stavros Niarchos Foundation Deutscher Akademischer Austauschdienst Alberta Innovates - Technology Futures Natural Sciences and Engineering Research Council of Canada Canada Research Chairs 2018 http://dx.doi.org/10.1002/eco.1975 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Feco.1975 https://onlinelibrary.wiley.com/doi/pdf/10.1002/eco.1975 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecohydrology volume 11, issue 5 ISSN 1936-0584 1936-0592 journal-article 2018 crwiley https://doi.org/10.1002/eco.1975 2024-08-30T04:11:16Z Abstract Evapotranspiration (ET) is a key component of the water cycle, whereby accurate partitioning of ET into evaporation and transpiration provides important information about the intrinsically coupled carbon, water, and energy fluxes. Currently, global estimates of partitioned evaporative and transpiration fluxes remain highly uncertain, especially for high‐latitude ecosystems where measurements are scarce. Forested peat plateaus underlain by permafrost and surrounded by permafrost‐free wetlands characterize approximately 60% (7.0 × 10 7 km 2 ) of Canadian peatlands. In this study, 22 Picea mariana (black spruce) individuals, the most common tree species of the North American boreal forest, were instrumented with sap flow sensors within the footprint of an eddy covariance tower measuring ET from a forest–wetland mosaic landscape. Sap flux density ( J S ), together with remote sensing data and in situ measurements of canopy structure, was used to upscale tree‐level J S to overstorey transpiration ( T BS ). Black spruce trees growing in nutrient‐poor permafrost peat soils were found to have lower mean J S than those growing in mineral soils. Overall, T BS contributed less than 1% to landscape ET. Climate‐change‐induced forest loss and the expansion of wetlands may further minimize the contributions of T BS to ET and increase the contribution of standing water. Article in Journal/Newspaper Peat permafrost Wiley Online Library Ecohydrology 11 5 e1975 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Evapotranspiration (ET) is a key component of the water cycle, whereby accurate partitioning of ET into evaporation and transpiration provides important information about the intrinsically coupled carbon, water, and energy fluxes. Currently, global estimates of partitioned evaporative and transpiration fluxes remain highly uncertain, especially for high‐latitude ecosystems where measurements are scarce. Forested peat plateaus underlain by permafrost and surrounded by permafrost‐free wetlands characterize approximately 60% (7.0 × 10 7 km 2 ) of Canadian peatlands. In this study, 22 Picea mariana (black spruce) individuals, the most common tree species of the North American boreal forest, were instrumented with sap flow sensors within the footprint of an eddy covariance tower measuring ET from a forest–wetland mosaic landscape. Sap flux density ( J S ), together with remote sensing data and in situ measurements of canopy structure, was used to upscale tree‐level J S to overstorey transpiration ( T BS ). Black spruce trees growing in nutrient‐poor permafrost peat soils were found to have lower mean J S than those growing in mineral soils. Overall, T BS contributed less than 1% to landscape ET. Climate‐change‐induced forest loss and the expansion of wetlands may further minimize the contributions of T BS to ET and increase the contribution of standing water. |
author2 |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Stavros Niarchos Foundation Deutscher Akademischer Austauschdienst Alberta Innovates - Technology Futures Natural Sciences and Engineering Research Council of Canada Canada Research Chairs |
format |
Article in Journal/Newspaper |
author |
Warren, Rebecca K. Pappas, Christoforos Helbig, Manuel Chasmer, Laura E. Berg, Aaron A. Baltzer, Jennifer L. Quinton, William L. Sonnentag, Oliver |
spellingShingle |
Warren, Rebecca K. Pappas, Christoforos Helbig, Manuel Chasmer, Laura E. Berg, Aaron A. Baltzer, Jennifer L. Quinton, William L. Sonnentag, Oliver Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
author_facet |
Warren, Rebecca K. Pappas, Christoforos Helbig, Manuel Chasmer, Laura E. Berg, Aaron A. Baltzer, Jennifer L. Quinton, William L. Sonnentag, Oliver |
author_sort |
Warren, Rebecca K. |
title |
Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
title_short |
Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
title_full |
Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
title_fullStr |
Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
title_full_unstemmed |
Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
title_sort |
minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/eco.1975 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Feco.1975 https://onlinelibrary.wiley.com/doi/pdf/10.1002/eco.1975 |
genre |
Peat permafrost |
genre_facet |
Peat permafrost |
op_source |
Ecohydrology volume 11, issue 5 ISSN 1936-0584 1936-0592 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/eco.1975 |
container_title |
Ecohydrology |
container_volume |
11 |
container_issue |
5 |
container_start_page |
e1975 |
_version_ |
1810470603222679552 |