Greenlandic ice archives of North Atlantic Common Era climate
Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019 Cataloged from PDF version of thesis. Includes bibliographical ref...
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ftmit:oai:dspace.mit.edu:1721.1/123740 2023-06-11T04:12:11+02:00 Greenlandic ice archives of North Atlantic Common Era climate Osman, Matthew B. Sarah B. Das. Joint Program in Oceanography/Applied Ocean Science and Engineering. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences. Woods Hole Oceanographic Institution. Joint Program in Oceanography/Applied Ocean Science and Engineering Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Woods Hole Oceanographic Institution n-gl---ln --- 2019 259, 15 unnumbered pages application/pdf https://hdl.handle.net/1721.1/123740 eng eng Massachusetts Institute of Technology https://hdl.handle.net/1721.1/123740 1138888721 MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 Joint Program in Oceanography/Applied Ocean Science and Engineering Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Climatology Temperature Thesis 2019 ftmit 2023-05-29T08:52:30Z Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019 Cataloged from PDF version of thesis. Includes bibliographical references. The Common Era (A.D. 1- present) represents a crucial period for climatic studies, documenting the timespan over which human activities have become an increasingly domineering force in shaping Earth's landscape, climate, and ecology. Direct, quantifiable records of climatic phenomena are severely limited over much of the Common Era, necessitating high-resolution, naturally-derived proxies to extend climatic insights beyond the satellite and instrumental era, particularly across remote high-latitude and maritime regions of the North Atlantic. Here, I use modem, data-driven and physically-based modeling approaches to gain new insights into North Atlantic climate variability from the Greenlandic ice core archive. First, I investigate the climatic fidelity of ice core glaciochemical climate proxies at the microphysical-scale. I show that several soluble chemical species - key among them methanesulfonic acid (MSA) - undergo rapid vertical migration through a super-cooled liquid-advection process along ice crystal grain-boundaries. I demonstrate that significant multi-year MSA changes occur only under low snow-accumulation and high-impurity-content conditions, thus mitigating the phenomenon over much of Greenland. Building upon these findings, I then investigate the cause of declining 19th and 20th-century MSA concentrations across the interior Greenland Ice Sheet. My results illustrate that Greenlandic MSA records provide a new proxy for North Atlantic planktonic biomass changes, illuminating a 10 ± 7% decline in marine productivity over the Industrial-era. I next present a new climate record from a previously-unexplored coastal ice cap in west-central Greenland. Using a physically-constrained ice cap ... Thesis Greenland greenlandic Ice cap ice core Ice Sheet North Atlantic DSpace@MIT (Massachusetts Institute of Technology) Greenland |
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Open Polar |
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DSpace@MIT (Massachusetts Institute of Technology) |
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English |
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Joint Program in Oceanography/Applied Ocean Science and Engineering Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Climatology Temperature |
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Joint Program in Oceanography/Applied Ocean Science and Engineering Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Climatology Temperature Osman, Matthew B. Greenlandic ice archives of North Atlantic Common Era climate |
topic_facet |
Joint Program in Oceanography/Applied Ocean Science and Engineering Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Climatology Temperature |
description |
Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019 Cataloged from PDF version of thesis. Includes bibliographical references. The Common Era (A.D. 1- present) represents a crucial period for climatic studies, documenting the timespan over which human activities have become an increasingly domineering force in shaping Earth's landscape, climate, and ecology. Direct, quantifiable records of climatic phenomena are severely limited over much of the Common Era, necessitating high-resolution, naturally-derived proxies to extend climatic insights beyond the satellite and instrumental era, particularly across remote high-latitude and maritime regions of the North Atlantic. Here, I use modem, data-driven and physically-based modeling approaches to gain new insights into North Atlantic climate variability from the Greenlandic ice core archive. First, I investigate the climatic fidelity of ice core glaciochemical climate proxies at the microphysical-scale. I show that several soluble chemical species - key among them methanesulfonic acid (MSA) - undergo rapid vertical migration through a super-cooled liquid-advection process along ice crystal grain-boundaries. I demonstrate that significant multi-year MSA changes occur only under low snow-accumulation and high-impurity-content conditions, thus mitigating the phenomenon over much of Greenland. Building upon these findings, I then investigate the cause of declining 19th and 20th-century MSA concentrations across the interior Greenland Ice Sheet. My results illustrate that Greenlandic MSA records provide a new proxy for North Atlantic planktonic biomass changes, illuminating a 10 ± 7% decline in marine productivity over the Industrial-era. I next present a new climate record from a previously-unexplored coastal ice cap in west-central Greenland. Using a physically-constrained ice cap ... |
author2 |
Sarah B. Das. Joint Program in Oceanography/Applied Ocean Science and Engineering. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences. Woods Hole Oceanographic Institution. Joint Program in Oceanography/Applied Ocean Science and Engineering Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Woods Hole Oceanographic Institution |
format |
Thesis |
author |
Osman, Matthew B. |
author_facet |
Osman, Matthew B. |
author_sort |
Osman, Matthew B. |
title |
Greenlandic ice archives of North Atlantic Common Era climate |
title_short |
Greenlandic ice archives of North Atlantic Common Era climate |
title_full |
Greenlandic ice archives of North Atlantic Common Era climate |
title_fullStr |
Greenlandic ice archives of North Atlantic Common Era climate |
title_full_unstemmed |
Greenlandic ice archives of North Atlantic Common Era climate |
title_sort |
greenlandic ice archives of north atlantic common era climate |
publisher |
Massachusetts Institute of Technology |
publishDate |
2019 |
url |
https://hdl.handle.net/1721.1/123740 |
op_coverage |
n-gl---ln --- |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland greenlandic Ice cap ice core Ice Sheet North Atlantic |
genre_facet |
Greenland greenlandic Ice cap ice core Ice Sheet North Atlantic |
op_relation |
https://hdl.handle.net/1721.1/123740 1138888721 |
op_rights |
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 |
_version_ |
1768387873984217088 |