Investigating the potential of oxygen-isotope records from anthropogenic lakes as tracers of 20th century climate change
Investigating the potential of oxygen-isotope records from anthropogenic lakes as tracers of 20th century climate change
Historical climate change in southern England was investigated using ostracod oxygen-isotope (δ 18O) records from two anthropogenic lakes in Hampshire, southern England. A strong relationship is observed between δ 18O ostracod, δ 18O precipitation and δ 18O lake_water in the contemporary environment and therefore δ 18O ostracod from the sedimentary record of these systems has the potential to reflect past climate variability. The possibility of these sites to act as archives of climate change through δ 18O ostracod analysis is explored through the study of lake sediment cores that cover the period from the early 20th century onwards. Both lakes showed similar directionality of shifts in δ 18O ostracod over this period, suggesting common driving mechanisms. Comparing δ 18O ostracod timeseries to meteorological data is challenging in part because of the complexity with which climate parameters are recorded in the δ 18O lake_water and consequently within lacustrine carbonates. Our findings highlight the potential of sediments from anthropogenic lakes to act as archives of past climate and indicate they may be an important resource for generating climatic reconstructions across the medieval to instrumental period, which the sediments of many anthropogenic lakes cover. Such climate reconstructions would greatly improve our spatial and temporal understanding of climate variability where instrumental data are unavailable and other natural archives are scarce.
Late-Holocene, anthropogenic lakes, climate change, historical, ostracods, oxygen isotopes
Tindall, J.M.
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Holmes, J
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Candy, I.
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Leng, M.J.
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Langdon, P.
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Fonville, T.
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Sear, D.A.
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Tindall, J.M.
187e6104-41be-4bb7-a09b-1e2cfb714f57
Holmes, J
563aba57-2a01-422a-8345-200c7148dc0f
Candy, I.
8ddb8402-f492-40b0-9612-ff1b3881589d
Leng, M.J.
c34d2987-561b-4794-bf4e-7cf92340bb67
Langdon, P.
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Fonville, T.
5fd85d9a-96d8-45e3-9bbd-b4c7e844d747
Sear, D.A.
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
Tindall, J.M., Holmes, J, Candy, I., Leng, M.J., Langdon, P., Fonville, T. and Sear, D.A.
(2024)
Investigating the potential of oxygen-isotope records from anthropogenic lakes as tracers of 20th century climate change.
The Holocene.
(doi:10.1177/09596836241266435).
Abstract
Historical climate change in southern England was investigated using ostracod oxygen-isotope (δ 18O) records from two anthropogenic lakes in Hampshire, southern England. A strong relationship is observed between δ 18O ostracod, δ 18O precipitation and δ 18O lake_water in the contemporary environment and therefore δ 18O ostracod from the sedimentary record of these systems has the potential to reflect past climate variability. The possibility of these sites to act as archives of climate change through δ 18O ostracod analysis is explored through the study of lake sediment cores that cover the period from the early 20th century onwards. Both lakes showed similar directionality of shifts in δ 18O ostracod over this period, suggesting common driving mechanisms. Comparing δ 18O ostracod timeseries to meteorological data is challenging in part because of the complexity with which climate parameters are recorded in the δ 18O lake_water and consequently within lacustrine carbonates. Our findings highlight the potential of sediments from anthropogenic lakes to act as archives of past climate and indicate they may be an important resource for generating climatic reconstructions across the medieval to instrumental period, which the sediments of many anthropogenic lakes cover. Such climate reconstructions would greatly improve our spatial and temporal understanding of climate variability where instrumental data are unavailable and other natural archives are scarce.
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tindall-et-al-2024-investigating-the-potential-of-oxygen-isotope-records-from-anthropogenic-lakes-as-tracers-of-20th
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Accepted/In Press date: 1 May 2024
e-pub ahead of print date: 13 August 2024
Keywords:
Late-Holocene, anthropogenic lakes, climate change, historical, ostracods, oxygen isotopes
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Local EPrints ID: 493458
URI: http://eprints.soton.ac.uk/id/eprint/493458
ISSN: 0959-6836
PURE UUID: 9712b37f-d9cd-4887-b797-93b89846b2f2
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Date deposited: 03 Sep 2024 16:44
Last modified: 04 Sep 2024 01:35
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Author:
J.M. Tindall
Author:
J Holmes
Author:
I. Candy
Author:
M.J. Leng
Author:
T. Fonville
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