Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes
Land surface models and Earth system models that include Arctic landscapes must capture the abrupt hydrological transitions that occur during the annual thaw and deepening of the active layer. In this work, stable water isotopes (δ 2 H and δ 18 O) are used to appraise hydrologically significant tran...
Published in: | Hydrological Processes |
---|---|
Main Authors: | , , , , , , |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1601399 https://www.osti.gov/biblio/1601399 https://doi.org/10.1002/hyp.13623 |
id |
ftosti:oai:osti.gov:1601399 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1601399 2023-07-30T04:01:39+02:00 Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes Conroy, Nathan Alec Newman, Brent David Heikoop, Jeffrey Martin Perkins, George Bradford Feng, Xiahong Wilson, Cathy Jean Wullschleger, Stan Duane 2021-10-28 application/pdf http://www.osti.gov/servlets/purl/1601399 https://www.osti.gov/biblio/1601399 https://doi.org/10.1002/hyp.13623 unknown http://www.osti.gov/servlets/purl/1601399 https://www.osti.gov/biblio/1601399 https://doi.org/10.1002/hyp.13623 doi:10.1002/hyp.13623 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1002/hyp.13623 2023-07-11T09:40:09Z Land surface models and Earth system models that include Arctic landscapes must capture the abrupt hydrological transitions that occur during the annual thaw and deepening of the active layer. In this work, stable water isotopes (δ 2 H and δ 18 O) are used to appraise hydrologically significant transitions during annual landscape thaw at the Barrow Environmental Observatory (Utqiaġvik, Alaska). These hydrologically significant periods are then linked to annual shifts in the landscape energy balance, deduced from meteorological data and described by the microclimatic periods: Winter, Pre-Melt, Melt, Post-Melt, Summer, and Freeze-Up. The tight coupling of the microclimatic periods with the hydrological transitions supports the use of microclimatic periods as a means of linking polygonal surface water hydrology to meteorological datasets, which provides a mechanism for improving the representation of polygonal surface water hydrology in process-based models. Rayleigh process reconstruction of the isotopic changes revealed that 19% of winter precipitation was lost to sublimation prior to melting and that 23% of surface water was lost to evaporation during the first 10 days post-melt. This agrees with evaporation rates reported in a separate study using an eddy covariance flux tower located nearby. An additional 17% was lost to evaporation during the next 33 days. Stable water isotopes are also used to identify the dominant sources of surface water to various hydrogeomorphological features prevalent in polygonal terrain (a lake, a low centre polygon centre, troughs within the rims of low centre polygons, flat centre polygon troughs, a high centre polygon trough, and drainages). Hydrogeomorphologies that retained significant old water or acted as snow drifts are isotopically distinct during the Melt Period and therefore are easily distinguished. Finally, biogeochemical changes related to the annual thaw are also reported and coupled to the hydrological transitions, which provides insight into the sources and ... Other/Unknown Material Arctic Barrow Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Hydrological Processes 34 3 749 764 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
58 GEOSCIENCES |
spellingShingle |
58 GEOSCIENCES Conroy, Nathan Alec Newman, Brent David Heikoop, Jeffrey Martin Perkins, George Bradford Feng, Xiahong Wilson, Cathy Jean Wullschleger, Stan Duane Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
topic_facet |
58 GEOSCIENCES |
description |
Land surface models and Earth system models that include Arctic landscapes must capture the abrupt hydrological transitions that occur during the annual thaw and deepening of the active layer. In this work, stable water isotopes (δ 2 H and δ 18 O) are used to appraise hydrologically significant transitions during annual landscape thaw at the Barrow Environmental Observatory (Utqiaġvik, Alaska). These hydrologically significant periods are then linked to annual shifts in the landscape energy balance, deduced from meteorological data and described by the microclimatic periods: Winter, Pre-Melt, Melt, Post-Melt, Summer, and Freeze-Up. The tight coupling of the microclimatic periods with the hydrological transitions supports the use of microclimatic periods as a means of linking polygonal surface water hydrology to meteorological datasets, which provides a mechanism for improving the representation of polygonal surface water hydrology in process-based models. Rayleigh process reconstruction of the isotopic changes revealed that 19% of winter precipitation was lost to sublimation prior to melting and that 23% of surface water was lost to evaporation during the first 10 days post-melt. This agrees with evaporation rates reported in a separate study using an eddy covariance flux tower located nearby. An additional 17% was lost to evaporation during the next 33 days. Stable water isotopes are also used to identify the dominant sources of surface water to various hydrogeomorphological features prevalent in polygonal terrain (a lake, a low centre polygon centre, troughs within the rims of low centre polygons, flat centre polygon troughs, a high centre polygon trough, and drainages). Hydrogeomorphologies that retained significant old water or acted as snow drifts are isotopically distinct during the Melt Period and therefore are easily distinguished. Finally, biogeochemical changes related to the annual thaw are also reported and coupled to the hydrological transitions, which provides insight into the sources and ... |
author |
Conroy, Nathan Alec Newman, Brent David Heikoop, Jeffrey Martin Perkins, George Bradford Feng, Xiahong Wilson, Cathy Jean Wullschleger, Stan Duane |
author_facet |
Conroy, Nathan Alec Newman, Brent David Heikoop, Jeffrey Martin Perkins, George Bradford Feng, Xiahong Wilson, Cathy Jean Wullschleger, Stan Duane |
author_sort |
Conroy, Nathan Alec |
title |
Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
title_short |
Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
title_full |
Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
title_fullStr |
Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
title_full_unstemmed |
Timing and duration of hydrological transitions in Arctic polygonal ground from stable isotopes |
title_sort |
timing and duration of hydrological transitions in arctic polygonal ground from stable isotopes |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1601399 https://www.osti.gov/biblio/1601399 https://doi.org/10.1002/hyp.13623 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Alaska |
genre_facet |
Arctic Barrow Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1601399 https://www.osti.gov/biblio/1601399 https://doi.org/10.1002/hyp.13623 doi:10.1002/hyp.13623 |
op_doi |
https://doi.org/10.1002/hyp.13623 |
container_title |
Hydrological Processes |
container_volume |
34 |
container_issue |
3 |
container_start_page |
749 |
op_container_end_page |
764 |
_version_ |
1772812423005208576 |