Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics
The ice sheet internal structure is an imprint of its history and dynamics, and, additionally, the ice and enclosed air provide valuable information about the past climate. An established continent-wide stratigraphy can constrain both paleo-climate reconstructions and ice-flow models. In this study,...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2018
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/1468 https://nbn-resolving.org/urn:nbn:de:gbv:46-00106655-14 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/1468 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/1468 2023-05-15T13:41:01+02:00 Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics Altersstratigrafie und basale Eigenschaften des Ostantarktischen Eisschildes aus Radarmessungen : und Rückschlüsse über die Eisdynamik Winter, Anna Eisen, Olaf von Dobeneck, Tilo 2018-05-25 application/pdf https://media.suub.uni-bremen.de/handle/elib/1468 https://nbn-resolving.org/urn:nbn:de:gbv:46-00106655-14 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/1468 urn:nbn:de:gbv:46-00106655-14 info:eu-repo/semantics/openAccess Glaciology East Antarctic Ice Sheet Radio-echo sounding Deep internal layers Age stratigraphy Oldest Ice Ice dynamics Basal properties 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2018 ftsubbremen 2022-11-09T07:09:36Z The ice sheet internal structure is an imprint of its history and dynamics, and, additionally, the ice and enclosed air provide valuable information about the past climate. An established continent-wide stratigraphy can constrain both paleo-climate reconstructions and ice-flow models. In this study, the internal stratigraphy and basal properties of the East Antarctic Ice Sheet (EAIS) are inferred from radio-echo sounding (RES) measurements and interpreted with respect to ice dynamics. The first part evaluates the compatibility of multiple RES data sets and investigates the physical cause for RES internal reflections, ensuring their isochronicity. These reflections are used to map the age-depth stratigraphy of the EAIS. The depth distribution of paleo surfaces provides first estimates about accumulation-rate distribution and maximum age of the ice. The third part analyzes the roughness of the EAIS' base. Relationships between basal roughness, ice-flow speed and basal temperatures are observed, which could serve as a method to infer the basal thermal condition or validate modeled temperate-bed locations. Doctoral or Postdoctoral Thesis Antarc* Antarctic Eisschild* Ice Sheet Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic East Antarctic Ice Sheet |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Glaciology East Antarctic Ice Sheet Radio-echo sounding Deep internal layers Age stratigraphy Oldest Ice Ice dynamics Basal properties 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
Glaciology East Antarctic Ice Sheet Radio-echo sounding Deep internal layers Age stratigraphy Oldest Ice Ice dynamics Basal properties 550 550 Earth sciences and geology ddc:550 Winter, Anna Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
topic_facet |
Glaciology East Antarctic Ice Sheet Radio-echo sounding Deep internal layers Age stratigraphy Oldest Ice Ice dynamics Basal properties 550 550 Earth sciences and geology ddc:550 |
description |
The ice sheet internal structure is an imprint of its history and dynamics, and, additionally, the ice and enclosed air provide valuable information about the past climate. An established continent-wide stratigraphy can constrain both paleo-climate reconstructions and ice-flow models. In this study, the internal stratigraphy and basal properties of the East Antarctic Ice Sheet (EAIS) are inferred from radio-echo sounding (RES) measurements and interpreted with respect to ice dynamics. The first part evaluates the compatibility of multiple RES data sets and investigates the physical cause for RES internal reflections, ensuring their isochronicity. These reflections are used to map the age-depth stratigraphy of the EAIS. The depth distribution of paleo surfaces provides first estimates about accumulation-rate distribution and maximum age of the ice. The third part analyzes the roughness of the EAIS' base. Relationships between basal roughness, ice-flow speed and basal temperatures are observed, which could serve as a method to infer the basal thermal condition or validate modeled temperate-bed locations. |
author2 |
Eisen, Olaf von Dobeneck, Tilo |
format |
Doctoral or Postdoctoral Thesis |
author |
Winter, Anna |
author_facet |
Winter, Anna |
author_sort |
Winter, Anna |
title |
Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
title_short |
Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
title_full |
Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
title_fullStr |
Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
title_full_unstemmed |
Age stratigraphy and basal properties of the East Antarctic Ice Sheet from radio-echo sounding measurements : and inferences about ice dynamics |
title_sort |
age stratigraphy and basal properties of the east antarctic ice sheet from radio-echo sounding measurements : and inferences about ice dynamics |
publisher |
Universität Bremen |
publishDate |
2018 |
url |
https://media.suub.uni-bremen.de/handle/elib/1468 https://nbn-resolving.org/urn:nbn:de:gbv:46-00106655-14 |
geographic |
Antarctic East Antarctic Ice Sheet |
geographic_facet |
Antarctic East Antarctic Ice Sheet |
genre |
Antarc* Antarctic Eisschild* Ice Sheet |
genre_facet |
Antarc* Antarctic Eisschild* Ice Sheet |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/1468 urn:nbn:de:gbv:46-00106655-14 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766144544423804928 |