The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice
The effects of meltwater percolation on pollen in snow, firn and glacial ice are not fully understood and currently hamper the use of pollen in ice-core studies of paleoclimate. Several studies have suggested that, due to grain size, pollen is not mobilized by meltwater transport. However, these fin...
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ftsouthmissispun:oai:aquila.usm.edu:fac_pubs-17174 2023-07-30T04:04:09+02:00 The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice Ewin, Michael E. Reese, Carl A. Nolan, Matthew A. 2017-07-10T07:00:00Z application/pdf https://aquila.usm.edu/fac_pubs/15863 https://aquila.usm.edu/context/fac_pubs/article/17174/viewcontent/the_potential_effects_of_percolating_snowmelt.pdf unknown The Aquila Digital Community https://aquila.usm.edu/fac_pubs/15863 https://aquila.usm.edu/context/fac_pubs/article/17174/viewcontent/the_potential_effects_of_percolating_snowmelt.pdf Faculty Publications ice chronology/dating mountain glaciers snow snow/ice surface processes surface melt Earth Sciences Glaciology Physical Sciences and Mathematics text 2017 ftsouthmissispun 2023-07-15T18:52:02Z The effects of meltwater percolation on pollen in snow, firn and glacial ice are not fully understood and currently hamper the use of pollen in ice-core studies of paleoclimate. Several studies have suggested that, due to grain size, pollen is not mobilized by meltwater transport. However, these findings contradict many ice-core pollen studies that show pollen concentrations in snow and firn are much higher than concentrations found in the ice layers they eventually form. This study addresses one aspect of this question by investigating whether meltwater percolation can effectively transport pollen within a snowpack. We used nine Styrofoam coolers filled by natural snow accumulation. The coolers were tested in three groups of three replicates each to simulate different glacier snowpack conditions, and spiked at the surface with a known amount of Lycopodium marker spores. The snow was melted to two-thirds the original volume, sampled stratigraphically and tested for spore concentrations. Meltwater effluent was also collected and examined. Results show substantial vertical and horizontal spore transport during the experiment. Peak spore concentrations were found in the bottommost snow layer or in the meltwater effluent in eight of nine coolers, indicating that the majority of surface spores were transported through the snowpack via meltwater percolation and/or runoff. Text ice core The University of Southern Mississippi: The Aquila Digital Community |
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Open Polar |
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The University of Southern Mississippi: The Aquila Digital Community |
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ftsouthmissispun |
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topic |
ice chronology/dating mountain glaciers snow snow/ice surface processes surface melt Earth Sciences Glaciology Physical Sciences and Mathematics |
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ice chronology/dating mountain glaciers snow snow/ice surface processes surface melt Earth Sciences Glaciology Physical Sciences and Mathematics Ewin, Michael E. Reese, Carl A. Nolan, Matthew A. The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
topic_facet |
ice chronology/dating mountain glaciers snow snow/ice surface processes surface melt Earth Sciences Glaciology Physical Sciences and Mathematics |
description |
The effects of meltwater percolation on pollen in snow, firn and glacial ice are not fully understood and currently hamper the use of pollen in ice-core studies of paleoclimate. Several studies have suggested that, due to grain size, pollen is not mobilized by meltwater transport. However, these findings contradict many ice-core pollen studies that show pollen concentrations in snow and firn are much higher than concentrations found in the ice layers they eventually form. This study addresses one aspect of this question by investigating whether meltwater percolation can effectively transport pollen within a snowpack. We used nine Styrofoam coolers filled by natural snow accumulation. The coolers were tested in three groups of three replicates each to simulate different glacier snowpack conditions, and spiked at the surface with a known amount of Lycopodium marker spores. The snow was melted to two-thirds the original volume, sampled stratigraphically and tested for spore concentrations. Meltwater effluent was also collected and examined. Results show substantial vertical and horizontal spore transport during the experiment. Peak spore concentrations were found in the bottommost snow layer or in the meltwater effluent in eight of nine coolers, indicating that the majority of surface spores were transported through the snowpack via meltwater percolation and/or runoff. |
format |
Text |
author |
Ewin, Michael E. Reese, Carl A. Nolan, Matthew A. |
author_facet |
Ewin, Michael E. Reese, Carl A. Nolan, Matthew A. |
author_sort |
Ewin, Michael E. |
title |
The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
title_short |
The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
title_full |
The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
title_fullStr |
The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
title_full_unstemmed |
The Potential Effects of Percolating Snowmelt on Palynological Records From Firn and Glacier Ice |
title_sort |
potential effects of percolating snowmelt on palynological records from firn and glacier ice |
publisher |
The Aquila Digital Community |
publishDate |
2017 |
url |
https://aquila.usm.edu/fac_pubs/15863 https://aquila.usm.edu/context/fac_pubs/article/17174/viewcontent/the_potential_effects_of_percolating_snowmelt.pdf |
genre |
ice core |
genre_facet |
ice core |
op_source |
Faculty Publications |
op_relation |
https://aquila.usm.edu/fac_pubs/15863 https://aquila.usm.edu/context/fac_pubs/article/17174/viewcontent/the_potential_effects_of_percolating_snowmelt.pdf |
_version_ |
1772815353404981248 |