Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records
Indiana University-Purdue University Indianapolis (IUPUI) Paleoclimate records from North and South America were used to develop a holistic understanding of global paleo-hydroclimatic drivers across a range of boundary conditions. Here, geophysical analysis of lacustrine sediment stratigraphy at Lag...
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ftiupui:oai:scholarworks.indianapolis.iu.edu:1805/30369 2024-09-09T19:27:41+00:00 Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records Gibson, Derek Keith Bird, Broxton Gilhooly, William, III Jacinthe, Pierre-André Licht, Kathy Wang, Xianzhong 2022-09 application/pdf https://hdl.handle.net/1805/30369 https://doi.org/10.7912/C2/3047 en_US eng https://hdl.handle.net/1805/30369 http://dx.doi.org/10.7912/C2/3047 Climate ENSO Flooding Geomorphology ITCZ Precipitation Dissertation 2022 ftiupui https://doi.org/10.7912/C2/3047 2024-08-08T03:18:34Z Indiana University-Purdue University Indianapolis (IUPUI) Paleoclimate records from North and South America were used to develop a holistic understanding of global paleo-hydroclimatic drivers across a range of boundary conditions. Here, geophysical analysis of lacustrine sediment stratigraphy at Lago de Tota, Boyaca, Colombia provided evidence for significant lake-level fluctuations through the late Quaternary and produced a record that potentially spans the last 60 ka. Seismic data revealed a series of off-lap and on-lap sequences in the upper ~20 m of sediments that indicated large amplitude changes in lake-level, driven by variability in the mean latitude of the Intertropical Convergence Zone as controlled by insolation- and ocean circulation-driven hemispheric temperature gradients during glacial/stadial and interglacial/interstadial events. In North America, late Holocene flood recurrence in the Midwest and Holocene changes in the mean latitude of the polar front jet stream were investigated through multi-proxy examinations of sediment cores collected from swale lakes in northern Kentucky and southern Indiana, and a glacially formed kettle lake in northern Indiana. These results showed that the midlatitude jet stream was displaced to the south during the late Holocene, which increased the amount of Midwestern precipitation sourced from the northern Pacific and Arctic, especially during prolonged cool conditions. During these cool periods, when atmospheric flow was meridional and a greater amount of precipitation was delivered from the northerly sources, Ohio River flooding increased. During warm conditions, when clockwise mean-state atmospheric circulation advected southerly moisture from the Gulf of Mexico into the Midwest, flooding on the Ohio River decreased. At present, streamflow in the Midwest is demonstrated here to be generally increasing, despite atmospheric conditions typically associated with reduced streamflow in the paleo-record, due in part to increasing precipitation and modern land-use ... Doctoral or Postdoctoral Thesis Arctic Indiana University - Purdue University Indianapolis: IUPUI Scholar Works Arctic Pacific |
institution |
Open Polar |
collection |
Indiana University - Purdue University Indianapolis: IUPUI Scholar Works |
op_collection_id |
ftiupui |
language |
English |
topic |
Climate ENSO Flooding Geomorphology ITCZ Precipitation |
spellingShingle |
Climate ENSO Flooding Geomorphology ITCZ Precipitation Gibson, Derek Keith Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
topic_facet |
Climate ENSO Flooding Geomorphology ITCZ Precipitation |
description |
Indiana University-Purdue University Indianapolis (IUPUI) Paleoclimate records from North and South America were used to develop a holistic understanding of global paleo-hydroclimatic drivers across a range of boundary conditions. Here, geophysical analysis of lacustrine sediment stratigraphy at Lago de Tota, Boyaca, Colombia provided evidence for significant lake-level fluctuations through the late Quaternary and produced a record that potentially spans the last 60 ka. Seismic data revealed a series of off-lap and on-lap sequences in the upper ~20 m of sediments that indicated large amplitude changes in lake-level, driven by variability in the mean latitude of the Intertropical Convergence Zone as controlled by insolation- and ocean circulation-driven hemispheric temperature gradients during glacial/stadial and interglacial/interstadial events. In North America, late Holocene flood recurrence in the Midwest and Holocene changes in the mean latitude of the polar front jet stream were investigated through multi-proxy examinations of sediment cores collected from swale lakes in northern Kentucky and southern Indiana, and a glacially formed kettle lake in northern Indiana. These results showed that the midlatitude jet stream was displaced to the south during the late Holocene, which increased the amount of Midwestern precipitation sourced from the northern Pacific and Arctic, especially during prolonged cool conditions. During these cool periods, when atmospheric flow was meridional and a greater amount of precipitation was delivered from the northerly sources, Ohio River flooding increased. During warm conditions, when clockwise mean-state atmospheric circulation advected southerly moisture from the Gulf of Mexico into the Midwest, flooding on the Ohio River decreased. At present, streamflow in the Midwest is demonstrated here to be generally increasing, despite atmospheric conditions typically associated with reduced streamflow in the paleo-record, due in part to increasing precipitation and modern land-use ... |
author2 |
Bird, Broxton Gilhooly, William, III Jacinthe, Pierre-André Licht, Kathy Wang, Xianzhong |
format |
Doctoral or Postdoctoral Thesis |
author |
Gibson, Derek Keith |
author_facet |
Gibson, Derek Keith |
author_sort |
Gibson, Derek Keith |
title |
Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
title_short |
Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
title_full |
Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
title_fullStr |
Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
title_full_unstemmed |
Investigating the Effects of Synoptic-Scale Climatic Processes on Local-Scale Hydrology by Combining Multi-Proxy Analyses of Lacustrine Sediments and Instrumental Records |
title_sort |
investigating the effects of synoptic-scale climatic processes on local-scale hydrology by combining multi-proxy analyses of lacustrine sediments and instrumental records |
publishDate |
2022 |
url |
https://hdl.handle.net/1805/30369 https://doi.org/10.7912/C2/3047 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://hdl.handle.net/1805/30369 http://dx.doi.org/10.7912/C2/3047 |
op_doi |
https://doi.org/10.7912/C2/3047 |
_version_ |
1809897082988789760 |