Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica
Density is a fundamental property of polar snowpacks and of particular importance for various applications such as remote sensing, surface-mass-balance estimates and paleoclimatic ice-core studies. As a result, there is growing interest in quantifying and understanding the stratigraphy of the snowpa...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.884003 2023-05-15T13:44:47+02:00 Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica Schaller, Christoph Florian Kipfstuhl, Sepp Steen-Larsen, Hans Christian Freitag, Johannes Eisen, Olaf MEDIAN LATITUDE: 15.374000 * MEDIAN LONGITUDE: -21.556000 * SOUTH-BOUND LATITUDE: -75.010000 * WEST-BOUND LONGITUDE: -35.980000 * NORTH-BOUND LATITUDE: 75.630000 * EAST-BOUND LONGITUDE: 0.080000 * DATE/TIME START: 2016-05-19T00:00:00 * DATE/TIME END: 2017-01-27T00:00:00 2017-12-12 application/zip, 40 datasets https://doi.pangaea.de/10.1594/PANGAEA.884003 https://doi.org/10.1594/PANGAEA.884003 en eng PANGAEA Schaller, Christoph Florian; Kipfstuhl, Sepp; Steen-Larsen, Hans Christian; Freitag, Johannes; Eisen, Olaf (in prep.): On the influence of polar snowpack stratigraphy on the interpretation of ice-core and altimetry data. Journal of Geophysical Research-Earth Surface Details of the position of the snow trenches (URI: https://store.pangaea.de/Publications/Schaller-etal_2017/Trenches.png) https://doi.pangaea.de/10.1594/PANGAEA.884003 https://doi.org/10.1594/PANGAEA.884003 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY AWI_Glac East Greenland Ice-core Project EGRIP Glaciology @ AWI Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.884003 2023-01-20T07:34:04Z Density is a fundamental property of polar snowpacks and of particular importance for various applications such as remote sensing, surface-mass-balance estimates and paleoclimatic ice-core studies. As a result, there is growing interest in quantifying and understanding the stratigraphy of the snowpack and its spatial variability. Melting and refreezing significantly impact the density layering. Melt frequencies observed in polar ice cores are commonly used as markers for extreme summer temperatures. Moreover, the evolution of a seasonal cycle in density with depth is not well-understood as all of these aspects require extensive field data. To provide a larger sample size, we analyzed snow cores up to 5 m depth from two sampling sites on the Greenlandic and East Antarctic plateaus and determined the spatial distribution of melt features along two orthogonal trench walls of 60 m length and 4 m depth for the Greenland site. We quantify how the observed variability of melt features is strongly influencing the ability to interpret single-core melt records. In particular, prominent vertical melt pipes indicate deep penetration of water in cold Greenlandic plateau firn. For the spatial variability in density, we find a much larger homogeneity of the snowpack along the main wind direction and an imprint of surface features orthogonal to it. Thus, within a certain area (such as the footprint of an altimeter) the stratigraphic variability is directionally dependent and estimation of a representative profile (e.g. from snow cores or modeling) is not straightforward. Dataset Antarc* Antarctic Antarctica East Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project greenlandic ice core PANGAEA - Data Publisher for Earth & Environmental Science Antarctic East Antarctica Greenland ENVELOPE(-35.980000,0.080000,75.630000,-75.010000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Glac East Greenland Ice-core Project EGRIP Glaciology @ AWI |
spellingShingle |
AWI_Glac East Greenland Ice-core Project EGRIP Glaciology @ AWI Schaller, Christoph Florian Kipfstuhl, Sepp Steen-Larsen, Hans Christian Freitag, Johannes Eisen, Olaf Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
topic_facet |
AWI_Glac East Greenland Ice-core Project EGRIP Glaciology @ AWI |
description |
Density is a fundamental property of polar snowpacks and of particular importance for various applications such as remote sensing, surface-mass-balance estimates and paleoclimatic ice-core studies. As a result, there is growing interest in quantifying and understanding the stratigraphy of the snowpack and its spatial variability. Melting and refreezing significantly impact the density layering. Melt frequencies observed in polar ice cores are commonly used as markers for extreme summer temperatures. Moreover, the evolution of a seasonal cycle in density with depth is not well-understood as all of these aspects require extensive field data. To provide a larger sample size, we analyzed snow cores up to 5 m depth from two sampling sites on the Greenlandic and East Antarctic plateaus and determined the spatial distribution of melt features along two orthogonal trench walls of 60 m length and 4 m depth for the Greenland site. We quantify how the observed variability of melt features is strongly influencing the ability to interpret single-core melt records. In particular, prominent vertical melt pipes indicate deep penetration of water in cold Greenlandic plateau firn. For the spatial variability in density, we find a much larger homogeneity of the snowpack along the main wind direction and an imprint of surface features orthogonal to it. Thus, within a certain area (such as the footprint of an altimeter) the stratigraphic variability is directionally dependent and estimation of a representative profile (e.g. from snow cores or modeling) is not straightforward. |
format |
Dataset |
author |
Schaller, Christoph Florian Kipfstuhl, Sepp Steen-Larsen, Hans Christian Freitag, Johannes Eisen, Olaf |
author_facet |
Schaller, Christoph Florian Kipfstuhl, Sepp Steen-Larsen, Hans Christian Freitag, Johannes Eisen, Olaf |
author_sort |
Schaller, Christoph Florian |
title |
Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
title_short |
Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
title_full |
Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
title_fullStr |
Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
title_full_unstemmed |
Spatial variability of density stratigraphy and melt features for two polar snowpacks in Greenland and East Antarctica |
title_sort |
spatial variability of density stratigraphy and melt features for two polar snowpacks in greenland and east antarctica |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.884003 https://doi.org/10.1594/PANGAEA.884003 |
op_coverage |
MEDIAN LATITUDE: 15.374000 * MEDIAN LONGITUDE: -21.556000 * SOUTH-BOUND LATITUDE: -75.010000 * WEST-BOUND LONGITUDE: -35.980000 * NORTH-BOUND LATITUDE: 75.630000 * EAST-BOUND LONGITUDE: 0.080000 * DATE/TIME START: 2016-05-19T00:00:00 * DATE/TIME END: 2017-01-27T00:00:00 |
long_lat |
ENVELOPE(-35.980000,0.080000,75.630000,-75.010000) |
geographic |
Antarctic East Antarctica Greenland |
geographic_facet |
Antarctic East Antarctica Greenland |
genre |
Antarc* Antarctic Antarctica East Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project greenlandic ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project greenlandic ice core |
op_relation |
Schaller, Christoph Florian; Kipfstuhl, Sepp; Steen-Larsen, Hans Christian; Freitag, Johannes; Eisen, Olaf (in prep.): On the influence of polar snowpack stratigraphy on the interpretation of ice-core and altimetry data. Journal of Geophysical Research-Earth Surface Details of the position of the snow trenches (URI: https://store.pangaea.de/Publications/Schaller-etal_2017/Trenches.png) https://doi.pangaea.de/10.1594/PANGAEA.884003 https://doi.org/10.1594/PANGAEA.884003 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.884003 |
_version_ |
1766206617741688832 |