Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey

Palaeo-hydrological interpretations of lake sediment proxies can benefit from a robust understanding of the modern lake environment. In this study, we use Nar Gölü, a non-outlet, monomictic maar lake in central Turkey, as a field site for a natural experiment using observations and measurements over...

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Main Authors:	Dean, Jonathan R., Eastwood, Warren J., Roberts, Neil, Jones, Matthew D., Yiğitbaşıoğlu, Hakan, Allcock, Samantha L., Woodbridge, Jessie, Metcalfe, Sarah E., Leng, Melanie J.
Format:	Article
Language:	English
Published:	Elsevier 2015
Online Access:	http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/1/Dean%20et%20al.%202015%20JoH.pdf

id	nottingham-31630
recordtype	eprints
spelling	nottingham-316302017-10-14T06:34:33Z http://eprints.nottingham.ac.uk/31630/ Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey Dean, Jonathan R. Eastwood, Warren J. Roberts, Neil Jones, Matthew D. Yiğitbaşıoğlu, Hakan Allcock, Samantha L. Woodbridge, Jessie Metcalfe, Sarah E. Leng, Melanie J. Palaeo-hydrological interpretations of lake sediment proxies can benefit from a robust understanding of the modern lake environment. In this study, we use Nar Gölü, a non-outlet, monomictic maar lake in central Turkey, as a field site for a natural experiment using observations and measurements over a 17-year monitoring period (1997–2014). We compare lake water and sediment trap data to isotopic, chemical and biotic proxies preserved in its varved sediments. Nar Gölü underwent a 3 m lake-level fall between 2000 and 2010. δ18Olakewater is correlated with this lake-level fall, responding to the change in water balance. Endogenic carbonate is shown to precipitate in isotopic equilibrium with lake water and there is a strong relationship between δ18Olakewater and δ18Ocarbonate, which suggests the water balance signal is accurately recorded in the sediment isotope record. Over the same period, sedimentary diatom assemblages also responded, and conductivity inferred from diatoms showed a rise. Shifts in carbonate mineralogy and elemental chemistry in the sediment record through this decade were also recorded. Intra-annual changes in δ18Olakewater and lake water chemistry are used to demonstrate the seasonal variability of the system and the influence this may have on the interpretation of δ18Ocarbonate. We use these relationships to help interpret the sedimentary record of changing lake hydrology over the last 1725 years. Nar Gölü has provided an opportunity to test critically the chain of connection from present to past, and its sedimentary record offers an archive of decadal- to centennial-scale hydro-climatic change Elsevier 2015-10-01 Article PeerReviewed application/pdf en cc_by_nc_nd http://eprints.nottingham.ac.uk/31630/1/Dean%20et%20al.%202015%20JoH.pdf Dean, Jonathan R. and Eastwood, Warren J. and Roberts, Neil and Jones, Matthew D. and Yiğitbaşıoğlu, Hakan and Allcock, Samantha L. and Woodbridge, Jessie and Metcalfe, Sarah E. and Leng, Melanie J. (2015) Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey. Journal of Hydrology, 529 (2). pp. 608-621. ISSN 1879-2707 http://www.sciencedirect.com/science/article/pii/S0022169414008890 doi:10.1016/j.jhydrol.2014.11.004 doi:10.1016/j.jhydrol.2014.11.004
repository_type	Digital Repository
institution_category	Local University
institution	University of Nottingham Malaysia Campus
building	Nottingham Research Data Repository
collection	Online Access
language	English
description	Palaeo-hydrological interpretations of lake sediment proxies can benefit from a robust understanding of the modern lake environment. In this study, we use Nar Gölü, a non-outlet, monomictic maar lake in central Turkey, as a field site for a natural experiment using observations and measurements over a 17-year monitoring period (1997–2014). We compare lake water and sediment trap data to isotopic, chemical and biotic proxies preserved in its varved sediments. Nar Gölü underwent a 3 m lake-level fall between 2000 and 2010. δ18Olakewater is correlated with this lake-level fall, responding to the change in water balance. Endogenic carbonate is shown to precipitate in isotopic equilibrium with lake water and there is a strong relationship between δ18Olakewater and δ18Ocarbonate, which suggests the water balance signal is accurately recorded in the sediment isotope record. Over the same period, sedimentary diatom assemblages also responded, and conductivity inferred from diatoms showed a rise. Shifts in carbonate mineralogy and elemental chemistry in the sediment record through this decade were also recorded. Intra-annual changes in δ18Olakewater and lake water chemistry are used to demonstrate the seasonal variability of the system and the influence this may have on the interpretation of δ18Ocarbonate. We use these relationships to help interpret the sedimentary record of changing lake hydrology over the last 1725 years. Nar Gölü has provided an opportunity to test critically the chain of connection from present to past, and its sedimentary record offers an archive of decadal- to centennial-scale hydro-climatic change
format	Article
author	Dean, Jonathan R. Eastwood, Warren J. Roberts, Neil Jones, Matthew D. Yiğitbaşıoğlu, Hakan Allcock, Samantha L. Woodbridge, Jessie Metcalfe, Sarah E. Leng, Melanie J.
spellingShingle	Dean, Jonathan R. Eastwood, Warren J. Roberts, Neil Jones, Matthew D. Yiğitbaşıoğlu, Hakan Allcock, Samantha L. Woodbridge, Jessie Metcalfe, Sarah E. Leng, Melanie J. Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
author_facet	Dean, Jonathan R. Eastwood, Warren J. Roberts, Neil Jones, Matthew D. Yiğitbaşıoğlu, Hakan Allcock, Samantha L. Woodbridge, Jessie Metcalfe, Sarah E. Leng, Melanie J.
author_sort	Dean, Jonathan R.
title	Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
title_short	Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
title_full	Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
title_fullStr	Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
title_full_unstemmed	Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey
title_sort	tracking the hydro-climatic signal from lake to sediment: a field study from central turkey
publisher	Elsevier
publishDate	2015
url	http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/ http://eprints.nottingham.ac.uk/31630/1/Dean%20et%20al.%202015%20JoH.pdf
first_indexed	2018-09-06T12:09:55Z
last_indexed	2018-09-06T12:09:55Z
_version_	1610859985548345344

Tracking the hydro-climatic signal from lake to sediment: a field study from central Turkey

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