Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling
Advances in instrumentation and sampling techniques in recent years have allowed for increasingly lower detection capabilities and finer sampling resolutions for ice core records, improving our understanding of the mechanisms of past climate change. We refine interpretations of select paleoclimate r...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:etd-3420 2023-06-11T04:06:12+02:00 Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling Armstrong Haines, Skylar 2015-08-01T07:00:00Z application/pdf https://digitalcommons.library.umaine.edu/etd/2371 https://digitalcommons.library.umaine.edu/context/etd/article/3420/viewcontent/HainesSA2015_OCR.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/etd/2371 https://digitalcommons.library.umaine.edu/context/etd/article/3420/viewcontent/HainesSA2015_OCR.pdf Electronic Theses and Dissertations Ice cores Greenland Antarctica Sampling Climate text 2015 ftmaineuniv 2023-05-04T18:02:23Z Advances in instrumentation and sampling techniques in recent years have allowed for increasingly lower detection capabilities and finer sampling resolutions for ice core records, improving our understanding of the mechanisms of past climate change. We refine interpretations of select paleoclimate records in polar ice cores through the use of a new ultra-high resolution (121 μm) non-destructive sampling method that achieves a temporal resolution of hundreds of samples per year using laser ablation inductively coupled plasma mass spectrometry (LA-ICP- MS). We measure concentrations of select glaciochemical species, proxies for atmospheric circulation from both an Arctic (GISP2) and Antarctic (Siple Dome) ice core archive. In the Arctic ice core archive, we offer the first sub-seasonal view of a glacial age abrupt climate change event. We focus on the abrupt ~84.5 ka climate transition from cold stadial to warmer interstadial conditions originally captured in the Greenland Ice Sheet Project 2 (GISP2) ice core records for stable water isotopes, soluble major ion records (IC), laser light scattering (LLS), and electrical conductivity measurements (ECM). We utilize the ultra-high resolution capabilities of a newly developed laser ablation- inductively couple plasma- mass spectrometry (LA-ICP-MS; 121 μm sampling resolution) system capable of conducting multi-parameter glaciochemical analysis. This is the oldest ice core sample thus far analyzed using this technique. Resulting ultra-high resolution data demonstrates that: (1) net summer and winter accumulation rates nearly double with entry into the interstadial, (2) summer storm frequency increases with entry into the interstadial, (3) the westerlies and Siberian High weaken with entry into the interstadial, while the strength of the Icelandic Low remains fairly constant, and (4) there are potentially valuable insights regarding the nature of abrupt climate change and very high resolution datasets. In the Antarctic ice core archives, we offer the first sub-seasonal ... Text Antarc* Antarctic Antarctica Arctic Climate change Greenland Greenland Ice Sheet Project ice core Ice Sheet The University of Maine: DigitalCommons@UMaine Arctic Antarctic The Antarctic Greenland Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
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Open Polar |
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The University of Maine: DigitalCommons@UMaine |
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topic |
Ice cores Greenland Antarctica Sampling Climate |
spellingShingle |
Ice cores Greenland Antarctica Sampling Climate Armstrong Haines, Skylar Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
topic_facet |
Ice cores Greenland Antarctica Sampling Climate |
description |
Advances in instrumentation and sampling techniques in recent years have allowed for increasingly lower detection capabilities and finer sampling resolutions for ice core records, improving our understanding of the mechanisms of past climate change. We refine interpretations of select paleoclimate records in polar ice cores through the use of a new ultra-high resolution (121 μm) non-destructive sampling method that achieves a temporal resolution of hundreds of samples per year using laser ablation inductively coupled plasma mass spectrometry (LA-ICP- MS). We measure concentrations of select glaciochemical species, proxies for atmospheric circulation from both an Arctic (GISP2) and Antarctic (Siple Dome) ice core archive. In the Arctic ice core archive, we offer the first sub-seasonal view of a glacial age abrupt climate change event. We focus on the abrupt ~84.5 ka climate transition from cold stadial to warmer interstadial conditions originally captured in the Greenland Ice Sheet Project 2 (GISP2) ice core records for stable water isotopes, soluble major ion records (IC), laser light scattering (LLS), and electrical conductivity measurements (ECM). We utilize the ultra-high resolution capabilities of a newly developed laser ablation- inductively couple plasma- mass spectrometry (LA-ICP-MS; 121 μm sampling resolution) system capable of conducting multi-parameter glaciochemical analysis. This is the oldest ice core sample thus far analyzed using this technique. Resulting ultra-high resolution data demonstrates that: (1) net summer and winter accumulation rates nearly double with entry into the interstadial, (2) summer storm frequency increases with entry into the interstadial, (3) the westerlies and Siberian High weaken with entry into the interstadial, while the strength of the Icelandic Low remains fairly constant, and (4) there are potentially valuable insights regarding the nature of abrupt climate change and very high resolution datasets. In the Antarctic ice core archives, we offer the first sub-seasonal ... |
format |
Text |
author |
Armstrong Haines, Skylar |
author_facet |
Armstrong Haines, Skylar |
author_sort |
Armstrong Haines, Skylar |
title |
Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
title_short |
Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
title_full |
Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
title_fullStr |
Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
title_full_unstemmed |
Investigation of Greenland and Antarctic Ice Core Recorded Climate Change Using Ultra-High Resolution Sampling |
title_sort |
investigation of greenland and antarctic ice core recorded climate change using ultra-high resolution sampling |
publisher |
DigitalCommons@UMaine |
publishDate |
2015 |
url |
https://digitalcommons.library.umaine.edu/etd/2371 https://digitalcommons.library.umaine.edu/context/etd/article/3420/viewcontent/HainesSA2015_OCR.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Arctic Antarctic The Antarctic Greenland Siple Siple Dome |
geographic_facet |
Arctic Antarctic The Antarctic Greenland Siple Siple Dome |
genre |
Antarc* Antarctic Antarctica Arctic Climate change Greenland Greenland Ice Sheet Project ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Arctic Climate change Greenland Greenland Ice Sheet Project ice core Ice Sheet |
op_source |
Electronic Theses and Dissertations |
op_relation |
https://digitalcommons.library.umaine.edu/etd/2371 https://digitalcommons.library.umaine.edu/context/etd/article/3420/viewcontent/HainesSA2015_OCR.pdf |
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1768378025996451840 |