Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain
The dynamics of evapotranspiration (ET), such as the partitioning to evaporation and transpiration, of polygonal ground on the Arctic Coastal Plain are not well understood. We assessed ET dynamics, including evaporation and transpiration partitioning, created by microtopographic features associated...
Published in: | Arctic, Antarctic, and Alpine Research |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Taylor & Francis Group
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1080/15230430.2018.1435931 https://doaj.org/article/2276b0fdbddd4a9ebb235f984ac887f1 |
id |
ftdoajarticles:oai:doaj.org/article:2276b0fdbddd4a9ebb235f984ac887f1 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:2276b0fdbddd4a9ebb235f984ac887f1 2023-05-15T14:14:30+02:00 Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain Jessica M. Young-Robertson Naama Raz-Yaseef Lily R. Cohen Brent Newman Thom Rahn Victoria Sloan Cathy Wilson Stan D. Wullschleger 2018-01-01T00:00:00Z https://doi.org/10.1080/15230430.2018.1435931 https://doaj.org/article/2276b0fdbddd4a9ebb235f984ac887f1 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2018.1435931 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2018.1435931 https://doaj.org/article/2276b0fdbddd4a9ebb235f984ac887f1 Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) polygonal ground permafrost ice wedge plant functional type evapotranspiration partitioning Environmental sciences GE1-350 Ecology QH540-549.5 article 2018 ftdoajarticles https://doi.org/10.1080/15230430.2018.1435931 2022-12-31T10:49:39Z The dynamics of evapotranspiration (ET), such as the partitioning to evaporation and transpiration, of polygonal ground on the Arctic Coastal Plain are not well understood. We assessed ET dynamics, including evaporation and transpiration partitioning, created by microtopographic features associated with high- and low-centered polygons. Chamber ET and leaf-level transpiration measurements were conducted in one-week field campaigns in two growing seasons with contrasting weather conditions. We found that ET was greater in the drier and warmer sampling period (2013) compared to the colder and wetter one (2014). Evaporation dominated ET, particularly in the wetter and colder sampling period (>90% in 2014 vs. 80% in 2013). In the 2013 sampling period, wetter and warmer conditions increased ET and the contribution of transpiration to ET. If the soils warm with degrading permafrost, ET and the fraction contributed by transpiration may increase to a certain threshold, when moisture must increase with rising temperatures to further increase these fluxes. While the fraction of transpiration may rise with warmer soils, it is unlikely that transpiration will completely dominate ET. This work highlights the complexities of understanding ET in this dynamic environment and the importance of understanding differences across polygonal ground. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Ice permafrost wedge* Directory of Open Access Journals: DOAJ Articles Arctic Arctic, Antarctic, and Alpine Research 50 1 e1435931 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
polygonal ground permafrost ice wedge plant functional type evapotranspiration partitioning Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
polygonal ground permafrost ice wedge plant functional type evapotranspiration partitioning Environmental sciences GE1-350 Ecology QH540-549.5 Jessica M. Young-Robertson Naama Raz-Yaseef Lily R. Cohen Brent Newman Thom Rahn Victoria Sloan Cathy Wilson Stan D. Wullschleger Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
topic_facet |
polygonal ground permafrost ice wedge plant functional type evapotranspiration partitioning Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
The dynamics of evapotranspiration (ET), such as the partitioning to evaporation and transpiration, of polygonal ground on the Arctic Coastal Plain are not well understood. We assessed ET dynamics, including evaporation and transpiration partitioning, created by microtopographic features associated with high- and low-centered polygons. Chamber ET and leaf-level transpiration measurements were conducted in one-week field campaigns in two growing seasons with contrasting weather conditions. We found that ET was greater in the drier and warmer sampling period (2013) compared to the colder and wetter one (2014). Evaporation dominated ET, particularly in the wetter and colder sampling period (>90% in 2014 vs. 80% in 2013). In the 2013 sampling period, wetter and warmer conditions increased ET and the contribution of transpiration to ET. If the soils warm with degrading permafrost, ET and the fraction contributed by transpiration may increase to a certain threshold, when moisture must increase with rising temperatures to further increase these fluxes. While the fraction of transpiration may rise with warmer soils, it is unlikely that transpiration will completely dominate ET. This work highlights the complexities of understanding ET in this dynamic environment and the importance of understanding differences across polygonal ground. |
format |
Article in Journal/Newspaper |
author |
Jessica M. Young-Robertson Naama Raz-Yaseef Lily R. Cohen Brent Newman Thom Rahn Victoria Sloan Cathy Wilson Stan D. Wullschleger |
author_facet |
Jessica M. Young-Robertson Naama Raz-Yaseef Lily R. Cohen Brent Newman Thom Rahn Victoria Sloan Cathy Wilson Stan D. Wullschleger |
author_sort |
Jessica M. Young-Robertson |
title |
Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
title_short |
Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
title_full |
Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
title_fullStr |
Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
title_full_unstemmed |
Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain |
title_sort |
evaporation dominates evapotranspiration on alaska’s arctic coastal plain |
publisher |
Taylor & Francis Group |
publishDate |
2018 |
url |
https://doi.org/10.1080/15230430.2018.1435931 https://doaj.org/article/2276b0fdbddd4a9ebb235f984ac887f1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic Ice permafrost wedge* |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Ice permafrost wedge* |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) |
op_relation |
http://dx.doi.org/10.1080/15230430.2018.1435931 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2018.1435931 https://doaj.org/article/2276b0fdbddd4a9ebb235f984ac887f1 |
op_doi |
https://doi.org/10.1080/15230430.2018.1435931 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
container_start_page |
e1435931 |
_version_ |
1766286929639243776 |