Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies
Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Apolinarska, Karina [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2021 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of paleolimnology - Springer Netherlands, 1988, 66(2021), 1 vom: 23. März, Seite 41-53 |
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| Übergeordnetes Werk: |
volume:66 ; year:2021 ; number:1 ; day:23 ; month:03 ; pages:41-53 |
| Links: |
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| DOI / URN: |
10.1007/s10933-021-00184-y |
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OLC2125203790 |
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| 245 | 1 | 0 | |a Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies |
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| 520 | |a Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. | ||
| 650 | 4 | |a Stable isotopes | |
| 650 | 4 | |a Carbonates | |
| 650 | 4 | |a Disequilibrium precipitation | |
| 650 | 4 | |a Varved sediments | |
| 650 | 4 | |a Sediment trap study | |
| 650 | 4 | |a Hypereutrophic lake | |
| 700 | 1 | |a Pleskot, Krzysztof |0 (orcid)0000-0002-3724-1700 |4 aut | |
| 700 | 1 | |a Pełechata, Aleksandra |0 (orcid)0000-0002-7487-8348 |4 aut | |
| 700 | 1 | |a Migdałek, Michał |4 aut | |
| 700 | 1 | |a Pełechaty, Mariusz |0 (orcid)0000-0002-4075-6561 |4 aut | |
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10.1007/s10933-021-00184-y doi (DE-627)OLC2125203790 (DE-He213)s10933-021-00184-y-p DE-627 ger DE-627 rakwb eng 570 930 VZ 14 13 12 ssgn Apolinarska, Karina verfasserin (orcid)0000-0002-3507-5139 aut Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2021 Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. Stable isotopes Carbonates Disequilibrium precipitation Varved sediments Sediment trap study Hypereutrophic lake Pleskot, Krzysztof (orcid)0000-0002-3724-1700 aut Pełechata, Aleksandra (orcid)0000-0002-7487-8348 aut Migdałek, Michał aut Pełechaty, Mariusz (orcid)0000-0002-4075-6561 aut Enthalten in Journal of paleolimnology Springer Netherlands, 1988 66(2021), 1 vom: 23. März, Seite 41-53 (DE-627)131173782 (DE-600)1140218-0 (DE-576)090827198 0921-2728 nnns volume:66 year:2021 number:1 day:23 month:03 pages:41-53 https://doi.org/10.1007/s10933-021-00184-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_154 AR 66 2021 1 23 03 41-53 |
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10.1007/s10933-021-00184-y doi (DE-627)OLC2125203790 (DE-He213)s10933-021-00184-y-p DE-627 ger DE-627 rakwb eng 570 930 VZ 14 13 12 ssgn Apolinarska, Karina verfasserin (orcid)0000-0002-3507-5139 aut Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2021 Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. Stable isotopes Carbonates Disequilibrium precipitation Varved sediments Sediment trap study Hypereutrophic lake Pleskot, Krzysztof (orcid)0000-0002-3724-1700 aut Pełechata, Aleksandra (orcid)0000-0002-7487-8348 aut Migdałek, Michał aut Pełechaty, Mariusz (orcid)0000-0002-4075-6561 aut Enthalten in Journal of paleolimnology Springer Netherlands, 1988 66(2021), 1 vom: 23. März, Seite 41-53 (DE-627)131173782 (DE-600)1140218-0 (DE-576)090827198 0921-2728 nnns volume:66 year:2021 number:1 day:23 month:03 pages:41-53 https://doi.org/10.1007/s10933-021-00184-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_154 AR 66 2021 1 23 03 41-53 |
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10.1007/s10933-021-00184-y doi (DE-627)OLC2125203790 (DE-He213)s10933-021-00184-y-p DE-627 ger DE-627 rakwb eng 570 930 VZ 14 13 12 ssgn Apolinarska, Karina verfasserin (orcid)0000-0002-3507-5139 aut Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2021 Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. Stable isotopes Carbonates Disequilibrium precipitation Varved sediments Sediment trap study Hypereutrophic lake Pleskot, Krzysztof (orcid)0000-0002-3724-1700 aut Pełechata, Aleksandra (orcid)0000-0002-7487-8348 aut Migdałek, Michał aut Pełechaty, Mariusz (orcid)0000-0002-4075-6561 aut Enthalten in Journal of paleolimnology Springer Netherlands, 1988 66(2021), 1 vom: 23. März, Seite 41-53 (DE-627)131173782 (DE-600)1140218-0 (DE-576)090827198 0921-2728 nnns volume:66 year:2021 number:1 day:23 month:03 pages:41-53 https://doi.org/10.1007/s10933-021-00184-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_154 AR 66 2021 1 23 03 41-53 |
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10.1007/s10933-021-00184-y doi (DE-627)OLC2125203790 (DE-He213)s10933-021-00184-y-p DE-627 ger DE-627 rakwb eng 570 930 VZ 14 13 12 ssgn Apolinarska, Karina verfasserin (orcid)0000-0002-3507-5139 aut Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2021 Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. Stable isotopes Carbonates Disequilibrium precipitation Varved sediments Sediment trap study Hypereutrophic lake Pleskot, Krzysztof (orcid)0000-0002-3724-1700 aut Pełechata, Aleksandra (orcid)0000-0002-7487-8348 aut Migdałek, Michał aut Pełechaty, Mariusz (orcid)0000-0002-4075-6561 aut Enthalten in Journal of paleolimnology Springer Netherlands, 1988 66(2021), 1 vom: 23. März, Seite 41-53 (DE-627)131173782 (DE-600)1140218-0 (DE-576)090827198 0921-2728 nnns volume:66 year:2021 number:1 day:23 month:03 pages:41-53 https://doi.org/10.1007/s10933-021-00184-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_154 AR 66 2021 1 23 03 41-53 |
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seasonal deposition of authigenic calcite out of isotopic equilibrium with dic and water, and implications for paleolimnological studies |
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Seasonal deposition of authigenic calcite out of isotopic equilibrium with DIC and water, and implications for paleolimnological studies |
| abstract |
Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. © The Author(s) 2021 |
| abstractGer |
Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. © The Author(s) 2021 |
| abstract_unstemmed |
Abstract We conducted year-round, monthly monitoring of the stable isotope composition of DIC and water in hypereutrophic Lake Kierskie, western Poland, along with isotope measures of calcite collected in sediment traps installed at 16 and 30 m water depth in the lake. Isotope data were supplemented by previously published data on physico-chemical variables in the lake water column. We sought to determine how carbon and oxygen isotopic disequilibria in calcite deposited in the lake’s laminated sediments vary seasonally, and what factors drive this variability. Deposition of calcite out of equilibrium with DIC and water was documented over the entire study period. For $ δ^{18} $O, the disequilibrium difference between successive months far exceeded the amplitude of the seasonal variability in the isotope composition of water. The biggest difference between the measured and calculated $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ values was observed during late autumn and winter sediment resuspension and redeposition (2.4‰ and 5.4‰, respectively). In the spring, $ δ^{13} $$ C_{calcite} $ and $ δ^{18} $$ O_{calcite} $ offsets from equilibria, 0.5‰ and 1.3‰, respectively, resulted from rapid precipitation of large calcite crystals. During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable. © The Author(s) 2021 |
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During summer, intense productivity and processes related to calcifying algae (“vital effects”) caused lower $ δ^{13} $C (0.5–1.8‰) and $ δ^{18} $O (2.8–2.9‰) in calcite. Differences between isotope values of calcite collected from the two water depths were small, and might have resulted from different settling velocities of small and large crystals, and/or preferential dissolution of smaller grains. We suggest that winter laminae should be excluded from isotope studies of varved sediments whenever possible, as they likely contain redeposited carbonate in which the isotope value is not indicative of conditions in the lake at the time of laminae formation. We also recommend supplementing isotope analysis of calcite in varved lake sediments with seasonally resolved analysis of carbonate content. It appears that major shifts in the proportion of carbonate deposited across seasons can cause notable changes in mean annual values of $ δ^{18} $$ O_{calcite} $ and $ δ^{13} $$ C_{calcite} $, even if DIC and water isotopic compositions remain stable.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Stable isotopes</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Carbonates</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Disequilibrium precipitation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Varved sediments</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sediment trap study</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Hypereutrophic lake</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Pleskot, Krzysztof</subfield><subfield code="0">(orcid)0000-0002-3724-1700</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Pełechata, Aleksandra</subfield><subfield code="0">(orcid)0000-0002-7487-8348</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Migdałek, Michał</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Pełechaty, Mariusz</subfield><subfield code="0">(orcid)0000-0002-4075-6561</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of paleolimnology</subfield><subfield code="d">Springer Netherlands, 1988</subfield><subfield code="g">66(2021), 1 vom: 23. März, Seite 41-53</subfield><subfield code="w">(DE-627)131173782</subfield><subfield code="w">(DE-600)1140218-0</subfield><subfield code="w">(DE-576)090827198</subfield><subfield code="x">0921-2728</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:66</subfield><subfield code="g">year:2021</subfield><subfield code="g">number:1</subfield><subfield code="g">day:23</subfield><subfield code="g">month:03</subfield><subfield code="g">pages:41-53</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/s10933-021-00184-y</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_154</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">66</subfield><subfield code="j">2021</subfield><subfield code="e">1</subfield><subfield code="b">23</subfield><subfield code="c">03</subfield><subfield code="h">41-53</subfield></datafield></record></collection>
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