Investigating the dielectric profiling of ice cores
The polar regions are important components of the Earth's climate system, as these areas are the main sources of fresh water on Earth. Any conflicts in that system can affect people's lives in different ways. Numerous studies show that global air temperature has increased, and it can lead...
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| Other Authors: | , |
| Format: | Other/Unknown Material |
| Language: | English |
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2021
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| Online Access: | http://hdl.handle.net/21.11130/00-1735-0000-0005-156D-A https://doi.org/10.53846/goediss-8423 https://nbn-resolving.org/urn:nbn:de:gbv:7-21.11130/00-1735-0000-0005-156D-A-8 |
| Summary: | The polar regions are important components of the Earth's climate system, as these areas are the main sources of fresh water on Earth. Any conflicts in that system can affect people's lives in different ways. Numerous studies show that global air temperature has increased, and it can lead to a global sea level rise due to polar ice-sheet mass loss. An increase in sea level in polar regions not only provides evidence of climate change, but also acts as a complex feedback mechanism between the Earth system components. This feedback can be used to predict what can happen in the future at different spatial and temporal resolutions. The ice core is an important climate archive that can help us to understand past climate conditions and we can use this information to predict future climate change using Earth climate modelling. There are numerous methods to investigate information from the ice core, Dielectric Profiling (DEP) recoded along the ice core is one such methods. Dielectric Profiling (DEP) is related to the impurity content of the ice core, such as acidity, salt, and ammonia concentrations or impurities caused by a volcanic event. In this dissertation, I focus on measuring and processing the recorded permittivity and conductivity of DEP data and then use the data in different aspects of glaciology and paleoclimatology. This study investigates different ice core data, including The East GReenland Ice-core Project (EGRIP) as a first ice core from the upper region of the North-East-Greenland Ice Stream (NEGIS), the North Greenland Eemian (NEEM) ice core with the oldest reconstructed record from a folded core, and the North Greenland Ice Core Project (NGRIP) with the oldest undisturbed record in Greenland. This dissertation established a first chronology of the EGRIP ice core over the Holocene and late last glacial period. The depth–age relationship of an ice core plays a key role in assessing the past Earth climate system. After field measurement in Greenland and processing the data set, I rely on DEP data and ... |
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