New estimates of the magnitude of the sea-level jump during the 8.2 ka event

Jonathan Obrist-Farner; Mark Brenner; Jeffery R. Stone; Marta Wojewódka-Przybył; Thorsten Bauersachs; Andreas Eckert; Marek Locmelis; Jason H. Curtis; Susan R.H. Zimmerman; Alex Correa-Metrio; Lorenz Schwark; Edward Duarte; Antje Schwalb; Etienne Niewerth; Paula Gabriela Echeverría-Galindo; Liseth Pérez

doi:10.1130/G49296.1

New estimates of the magnitude of the sea-level jump during the 8.2 ka event

Jonathan Obrist-Farner, Mark Brenner, Jeffery R. Stone, Marta Wojewódka-Przybył, Thorsten Bauersachs, Andreas Eckert, Marek Locmelis, Jason H. Curtis, Susan R.H. Zimmerman, Alex Correa-Metrio, Lorenz Schwark, Edward Duarte, Antje Schwalb, Etienne Niewerth, Paula Gabriela Echeverría-Galindo, Liseth Pérez

Continental Scientific Drilling Facility

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12 Scopus citations

Abstract

We analyzed sediment cores from coastal Lake Izabal, Guatemala, to infer Holocene biogeochemical changes in the lake. At ca. 8370 calibrated yr B.P. (cal. yr B.P.), marine waters entered the lake, which presently lies ~38 km from the Caribbean coast. Temporal correlation between Early Holocene drainage of high-latitude Lakes Agassiz and Ojibway (in North America) and marine flooding of Lake Izabal suggests a causal link between the two processes. Our data indicate a relative sea-level jump of 2.60 ± 0.88 m, which is larger than previous estimates of sea-level rise during the 8.2 ka event. The inferred sea-level jump, however, cannot be explained solely by the volume of water released during drainage of Lakes Agassiz and Ojibway. Instead, we propose that previous studies underestimated the magnitude of Lakes Agassiz and Ojibway discharge, or that additional meltwater sources contributed to global sea-level rise at that time.

Original language	English (US)
Pages (from-to)	86-90
Number of pages	5
Journal	Geology
Volume	50
Issue number	1
DOIs	https://doi.org/10.1130/G49296.1
State	Published - 2022

Bibliographical note

Funding Information:
We thank Paul Baker, Matt Peros, and four anonymous reviewers for constructive reviews that helped improve the manuscript; Defensores de la Naturaleza (Guatemala) and the National Lacustrine Core Facility (LacCore, Minnesota, USA) for help with core collection and analyses, respectively; and Robert Brown for help with X-ray fluorescence spectrometry core scanning. This is contribution #11 of the Missouri S&T MCTF research group and Lawrence Livermore National Laboratory contribution LLNL-JRNL-805149.

Publisher Copyright:
© 2021. The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.

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Obrist-Farner, J., Brenner, M., Stone, J. R., Wojewódka-Przybył, M., Bauersachs, T., Eckert, A., Locmelis, M., Curtis, J. H., Zimmerman, S. R. H., Correa-Metrio, A., Schwark, L., Duarte, E., Schwalb, A., Niewerth, E., Echeverría-Galindo, P. G., & Pérez, L. (2022). New estimates of the magnitude of the sea-level jump during the 8.2 ka event. Geology, 50(1), 86-90. https://doi.org/10.1130/G49296.1

Obrist-Farner, J, Brenner, M, Stone, JR, Wojewódka-Przybył, M, Bauersachs, T, Eckert, A, Locmelis, M, Curtis, JH, Zimmerman, SRH, Correa-Metrio, A, Schwark, L, Duarte, E, Schwalb, A, Niewerth, E, Echeverría-Galindo, PG & Pérez, L 2022, 'New estimates of the magnitude of the sea-level jump during the 8.2 ka event', Geology, vol. 50, no. 1, pp. 86-90. https://doi.org/10.1130/G49296.1

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title = "New estimates of the magnitude of the sea-level jump during the 8.2 ka event",

abstract = "We analyzed sediment cores from coastal Lake Izabal, Guatemala, to infer Holocene biogeochemical changes in the lake. At ca. 8370 calibrated yr B.P. (cal. yr B.P.), marine waters entered the lake, which presently lies ~38 km from the Caribbean coast. Temporal correlation between Early Holocene drainage of high-latitude Lakes Agassiz and Ojibway (in North America) and marine flooding of Lake Izabal suggests a causal link between the two processes. Our data indicate a relative sea-level jump of 2.60 ± 0.88 m, which is larger than previous estimates of sea-level rise during the 8.2 ka event. The inferred sea-level jump, however, cannot be explained solely by the volume of water released during drainage of Lakes Agassiz and Ojibway. Instead, we propose that previous studies underestimated the magnitude of Lakes Agassiz and Ojibway discharge, or that additional meltwater sources contributed to global sea-level rise at that time.",

author = "Jonathan Obrist-Farner and Mark Brenner and Stone, {Jeffery R.} and Marta Wojew{\'o}dka-Przyby{\l} and Thorsten Bauersachs and Andreas Eckert and Marek Locmelis and Curtis, {Jason H.} and Zimmerman, {Susan R.H.} and Alex Correa-Metrio and Lorenz Schwark and Edward Duarte and Antje Schwalb and Etienne Niewerth and Echeverr{\'i}a-Galindo, {Paula Gabriela} and Liseth P{\'e}rez",

note = "Funding Information: We thank Paul Baker, Matt Peros, and four anonymous reviewers for constructive reviews that helped improve the manuscript; Defensores de la Naturaleza (Guatemala) and the National Lacustrine Core Facility (LacCore, Minnesota, USA) for help with core collection and analyses, respectively; and Robert Brown for help with X-ray fluorescence spectrometry core scanning. This is contribution #11 of the Missouri S&T MCTF research group and Lawrence Livermore National Laboratory contribution LLNL-JRNL-805149. Publisher Copyright: {\textcopyright} 2021. The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.",

year = "2022",

doi = "10.1130/G49296.1",

language = "English (US)",

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T1 - New estimates of the magnitude of the sea-level jump during the 8.2 ka event

AU - Obrist-Farner, Jonathan

AU - Brenner, Mark

AU - Stone, Jeffery R.

AU - Wojewódka-Przybył, Marta

AU - Bauersachs, Thorsten

AU - Eckert, Andreas

AU - Locmelis, Marek

AU - Curtis, Jason H.

AU - Zimmerman, Susan R.H.

AU - Correa-Metrio, Alex

AU - Schwark, Lorenz

AU - Duarte, Edward

AU - Schwalb, Antje

AU - Niewerth, Etienne

AU - Echeverría-Galindo, Paula Gabriela

AU - Pérez, Liseth

N1 - Funding Information: We thank Paul Baker, Matt Peros, and four anonymous reviewers for constructive reviews that helped improve the manuscript; Defensores de la Naturaleza (Guatemala) and the National Lacustrine Core Facility (LacCore, Minnesota, USA) for help with core collection and analyses, respectively; and Robert Brown for help with X-ray fluorescence spectrometry core scanning. This is contribution #11 of the Missouri S&T MCTF research group and Lawrence Livermore National Laboratory contribution LLNL-JRNL-805149. Publisher Copyright: © 2021. The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.

PY - 2022

Y1 - 2022

N2 - We analyzed sediment cores from coastal Lake Izabal, Guatemala, to infer Holocene biogeochemical changes in the lake. At ca. 8370 calibrated yr B.P. (cal. yr B.P.), marine waters entered the lake, which presently lies ~38 km from the Caribbean coast. Temporal correlation between Early Holocene drainage of high-latitude Lakes Agassiz and Ojibway (in North America) and marine flooding of Lake Izabal suggests a causal link between the two processes. Our data indicate a relative sea-level jump of 2.60 ± 0.88 m, which is larger than previous estimates of sea-level rise during the 8.2 ka event. The inferred sea-level jump, however, cannot be explained solely by the volume of water released during drainage of Lakes Agassiz and Ojibway. Instead, we propose that previous studies underestimated the magnitude of Lakes Agassiz and Ojibway discharge, or that additional meltwater sources contributed to global sea-level rise at that time.

AB - We analyzed sediment cores from coastal Lake Izabal, Guatemala, to infer Holocene biogeochemical changes in the lake. At ca. 8370 calibrated yr B.P. (cal. yr B.P.), marine waters entered the lake, which presently lies ~38 km from the Caribbean coast. Temporal correlation between Early Holocene drainage of high-latitude Lakes Agassiz and Ojibway (in North America) and marine flooding of Lake Izabal suggests a causal link between the two processes. Our data indicate a relative sea-level jump of 2.60 ± 0.88 m, which is larger than previous estimates of sea-level rise during the 8.2 ka event. The inferred sea-level jump, however, cannot be explained solely by the volume of water released during drainage of Lakes Agassiz and Ojibway. Instead, we propose that previous studies underestimated the magnitude of Lakes Agassiz and Ojibway discharge, or that additional meltwater sources contributed to global sea-level rise at that time.

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JF - Geology

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ER -

New estimates of the magnitude of the sea-level jump during the 8.2 ka event

Abstract

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