Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods
AbstractThe effect of proglacial groundwater systems on surface hydrology and ecology in cold regions often is neglected when assessing the ecohydrological implications of climate change. We present a novel approach in which we combined 2 temperature-tracing techniques to assess the spatial patterns...
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dataone:sha256:42c3a6777c53a9567b11a37160d33124dc91b7ee013237ab02b07169396b7898 2024-06-03T18:46:51+00:00 Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods D. A. Tristram 2021-07-17T18:45:55Z https://search.dataone.org/view/sha256:42c3a6777c53a9567b11a37160d33124dc91b7ee013237ab02b07169396b7898 unknown CTEMPs groundwater - surface water DTS fiber optic Dataset dataone:urn:node:HYDROSHARE 2024-06-03T18:17:27Z AbstractThe effect of proglacial groundwater systems on surface hydrology and ecology in cold regions often is neglected when assessing the ecohydrological implications of climate change. We present a novel approach in which we combined 2 temperature-tracing techniques to assess the spatial patterns and short-term temporal dynamics of groundwater–surface-water exchange in the proglacial zone of Skaftafellsjökull, a retreating glacier in southeastern Iceland. Our study focuses on localized groundwater discharge to a surface-water environment, where high temporal- and spatial-resolution mapping of sediment surface and subsurface temperatures (10–15 cm depth) were obtained by Fiber-Optic Distributed Temperature Sensing (FO-DTS). The FO-DTS survey identified temporally consistent locations of temperature anomalies at the sediment–water interface, indicating distinct zones of cooler groundwater upwelling. The high-resolution FO-DTS surveys were combined with calculations of 1-dimensional groundwater seepage fluxes based on 3 vertical sediment temperature profiles, covering depths of 10, 25, and 40 cm below the lake bed. The calculated groundwater seepage rates ranged between 1.02 to 6.10 m/d. We used the combined techniques successfully to identify substantial temporal and spatial heterogeneities in groundwater–surface exchange fluxes that have relevance for the ecohydrological functioning of the investigated system and its potential resilience to environmental change. Raw project data is available by contacting ctemps@unr.edu Dataset glacier Iceland Unknown Skaftafellsjökull ENVELOPE(-16.881,-16.881,64.063,64.063) |
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dataone:urn:node:HYDROSHARE |
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CTEMPs groundwater - surface water DTS fiber optic |
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CTEMPs groundwater - surface water DTS fiber optic D. A. Tristram Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
topic_facet |
CTEMPs groundwater - surface water DTS fiber optic |
description |
AbstractThe effect of proglacial groundwater systems on surface hydrology and ecology in cold regions often is neglected when assessing the ecohydrological implications of climate change. We present a novel approach in which we combined 2 temperature-tracing techniques to assess the spatial patterns and short-term temporal dynamics of groundwater–surface-water exchange in the proglacial zone of Skaftafellsjökull, a retreating glacier in southeastern Iceland. Our study focuses on localized groundwater discharge to a surface-water environment, where high temporal- and spatial-resolution mapping of sediment surface and subsurface temperatures (10–15 cm depth) were obtained by Fiber-Optic Distributed Temperature Sensing (FO-DTS). The FO-DTS survey identified temporally consistent locations of temperature anomalies at the sediment–water interface, indicating distinct zones of cooler groundwater upwelling. The high-resolution FO-DTS surveys were combined with calculations of 1-dimensional groundwater seepage fluxes based on 3 vertical sediment temperature profiles, covering depths of 10, 25, and 40 cm below the lake bed. The calculated groundwater seepage rates ranged between 1.02 to 6.10 m/d. We used the combined techniques successfully to identify substantial temporal and spatial heterogeneities in groundwater–surface exchange fluxes that have relevance for the ecohydrological functioning of the investigated system and its potential resilience to environmental change. Raw project data is available by contacting ctemps@unr.edu |
format |
Dataset |
author |
D. A. Tristram |
author_facet |
D. A. Tristram |
author_sort |
D. A. Tristram |
title |
Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
title_short |
Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
title_full |
Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
title_fullStr |
Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
title_full_unstemmed |
Identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
title_sort |
identifying spatial and temporal dynamics of proglacial groundwater–surface-water exchange using combined temperature-tracing methods |
publishDate |
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url |
https://search.dataone.org/view/sha256:42c3a6777c53a9567b11a37160d33124dc91b7ee013237ab02b07169396b7898 |
long_lat |
ENVELOPE(-16.881,-16.881,64.063,64.063) |
geographic |
Skaftafellsjökull |
geographic_facet |
Skaftafellsjökull |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
_version_ |
1800872012749471744 |