A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES

Bibliographic Details
Main Author:	Ratnayake Mudiyanselage, Kalpani Manurangi
Language:	English
Published:	Kent State University / OhioLINK 2020
Subjects:	Climate Change Environmental Geology Geology Paleoclimate Science Sedimentary Geology Multiproxy,Deglaciation,Holocene,Paleoclimate,Radio Carbon dating,Fresh water,reservoir correction,Sedimentary analysis,Linear Sedimentation Rates,Mass Accumulation Rate,Hypsithermal,Nipissing Phases
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=kent1606763358671089

id	ndltd-OhioLink-oai-etd.ohiolink.edu-kent1606763358671089
record_format	oai_dc
spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-kent16067633586710892021-08-03T07:16:31Z A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES Ratnayake Mudiyanselage, Kalpani Manurangi Climate Change Environmental Geology Geology Paleoclimate Science Sedimentary Geology Multiproxy,Deglaciation,Holocene,Paleoclimate,Radio Carbon dating,Fresh water,reservoir correction,Sedimentary analysis,Linear Sedimentation Rates,Mass Accumulation Rate,Hypsithermal,Nipissing Phases Lake Erie is critical in understanding regional paleoclimate and hydrology because it is the shallowest and volumetrically the smallest of the Great Lakes, therefore, it is very sensitive and vulnerable to environmental and hydrologic changes, including perturbations by humans. This study is a basic approach to evaluate past climatic history using five deep sediment cores from western, central and eastern basin of the Lake Erie. Particle size analysis (Malvern UM 2000), reflectance measurements (handheld Minolta CM-2600d), XRF analysis, XRD, MS and Age dating were carried out using homogenized sediments at 10 cm resolution. The freshwater Reservoir correction was recalculated for three basins of Lake Erie and for Lake Michigan and Huron using modern 14C dates which has previously been referred to as the `hardwater effect’. Prior calculation of the hard water effect for Lake Michigan and Lake Huron (Moore et al., 1998) varies from 226 to 375 14C yrs and 326 to 498 14C yrs respectively. The revised FWRC values obtained from published data document a generally increasing trend among the circulation pathway from Lake Michigan to Lake Huron with increasing ages of 265 ± 53 14C yrs in Southern Lake Michigan, 226 ± 61 14C yrs in Northern Lake Michigan, and 375 ± 41 14C yrs in Green Bay area. The average FWRC value for Northern Lake Huron is 348 ± 70 14C yrs; For Georgian Bay is 345 ± 70 14C yrs and Southern Lake Huron is 459 ± 61 14C yrs. Calculated freshwater reservoir correction value for Lake Erie western basin is 464 ± 51 14C yrs and the central basin is 678 ± 46 14C yrs, and for eastern basin 732 ± 64 14C yrs. The FWRC value increased from west to east in Lake Erie. These changes are likely related to basin depth, carbonate preservation differences and changes in circulation within the basins. The linear sedimentation rate (LSR) and Mass Accumulation Rate (MAR) is gradually increasing from western basin to central basin and highest is obtained in the eastern basin. Paleoclimate proxies of the Lake sediment indicate paleo-productivity, environmental changes and hydrological changes from last deglaciation. Data from sediment cores revealed that three major stratigraphy changes in sediment profiles during post younger Dryas period, Holocene Hypsithermal including Nipissing phases and Neoglacial period. These shifts in multi proxy data agree with drainage changes in Upper Great Lakes water to Lake Erie during last deglaciation and Holocene periods. 2020-12-01 English text Kent State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=kent1606763358671089 http://rave.ohiolink.edu/etdc/view?acc_num=kent1606763358671089 restricted--full text unavailable until 2022-11-30 This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection	NDLTD
language	English
sources	NDLTD
topic	Climate Change Environmental Geology Geology Paleoclimate Science Sedimentary Geology Multiproxy,Deglaciation,Holocene,Paleoclimate,Radio Carbon dating,Fresh water,reservoir correction,Sedimentary analysis,Linear Sedimentation Rates,Mass Accumulation Rate,Hypsithermal,Nipissing Phases
spellingShingle	Climate Change Environmental Geology Geology Paleoclimate Science Sedimentary Geology Multiproxy,Deglaciation,Holocene,Paleoclimate,Radio Carbon dating,Fresh water,reservoir correction,Sedimentary analysis,Linear Sedimentation Rates,Mass Accumulation Rate,Hypsithermal,Nipissing Phases Ratnayake Mudiyanselage, Kalpani Manurangi A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
author	Ratnayake Mudiyanselage, Kalpani Manurangi
author_facet	Ratnayake Mudiyanselage, Kalpani Manurangi
author_sort	Ratnayake Mudiyanselage, Kalpani Manurangi
title	A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
title_short	A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
title_full	A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
title_fullStr	A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
title_full_unstemmed	A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES
title_sort	multi-proxy approach to reconstruction of holocene climate change: evidence from lake erie sedimentary archives
publisher	Kent State University / OhioLINK
publishDate	2020
url	http://rave.ohiolink.edu/etdc/view?acc_num=kent1606763358671089
work_keys_str_mv	AT ratnayakemudiyanselagekalpanimanurangi amultiproxyapproachtoreconstructionofholoceneclimatechangeevidencefromlakeeriesedimentaryarchives AT ratnayakemudiyanselagekalpanimanurangi multiproxyapproachtoreconstructionofholoceneclimatechangeevidencefromlakeeriesedimentaryarchives
_version_	1719457993981952000

A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES

Similar Items