Seasonal variability in temperature trends and atmospheric circulation systems during the Eemian (Last Interglacial) based on n-alkanes hydrogen isotopes from Northern Finland

Katrantsiotis, Christos; Norström, Elin; Smittenberg, Rienk H.; Salonen, J. Sakari; Plikk, Anna; Helmens, Karin F.

doi:10.1016/j.quascirev.2021.107250

Cited by 3 publications

(2 citation statements)

References 99 publications

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“…Katrantsiotis et al . 2021). Winter‐biased lake water during the growing season can be the result of a higher proportion of the annual precipitation falling as snow, and late snow‐melt (Jonsson et al .…”

Section: Discussionmentioning

confidence: 99%

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H

Kjellman,

Thomas,

Farnsworth

et al. 2024

Boreas

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Svalbard spans large climate gradients, associated with atmospheric circulation patterns and variations in ocean heat content and sea ice cover. Future precipitation increases are projected to peak in the northeast and to mainly occur in winter, but uncertainties underscore the need for reconstructions of long‐term spatial and temporal variations in precipitation amounts and seasonality. We use lipid biomarkers from four sedimentary lake records along a climatic gradient from western to northeastern Svalbard to reconstruct Holocene water cycle changes. We measured the leaf wax hydrogen isotopic composition of long‐chain (terrestrial) and mid‐chain (aquatic) n‐alkanoic acids, reflecting δ2H of precipitation (δ2Hprecip) and lake water (δ2Hlake), respectively. δ2Hprecip values mainly reflect summer precipitation δ2H and evapotranspiration, whereas δ2Hlake values can reflect various precipitation seasonality due to varying lake hydrology. For one lake, we used the difference between δ2Hprecip and δ2Hlake (εprecip‐lake) to infer summer evapotranspiration changes. Relatively 2H‐enriched δ2Hprecip values and higher εprecip‐lake in the Early and Middle Holocene suggest warm summers with higher evapotranspiration, and/or more proximal summer moisture. After c. 6 cal. ka BP, 2H‐depleted δ2Hprecip values and lower εprecip‐lake indicate summer cooling, less evapotranspiration, or more distally derived moisture. Early to Middle Holocene decrease in δ2Hlake values in two northern Spitsbergen lakes reflects an increase in the proportion of winter relative to summer precipitation, associated with regional warming and increased moisture supply, which may be due to increased distal moisture supply and/or reduced sea ice cover. Our northern Svalbard δ2Hlake records suggest great Late Holocene climate variability with periodic winter precipitation increases or decreases in summer precipitation inflow to the lakes. We find that Holocene summer precipitation δ2H values mainly follow changes in summer insolation and temperature, whereas the seasonal distribution of precipitation is sensitive to catchment hydrology, regional ocean surface conditions, and moisture source changes.

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Section: Discussionmentioning

confidence: 99%

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H

Kjellman,

Thomas,

Farnsworth

et al. 2024

Boreas

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“…Günther et al ., 2016; Saini et al ., 2017; Aichner et al ., 2019) and seasonality of precipitation (e.g. Kjellman et al ., 2020; Katrantsiotis et al ., 2021) have been determined. Another approach to disentangling the impact of lake water evaporation from precipitation changes is coupling δ 2 H and δ 18 O reconstructions, as demonstrated using δ 2 H of n ‐alkanes and δ 18 O of sugar biomarkers to develop a Lateglacial–Holocene palaeohydrological reconstruction from Himalayan Nepal (Hepp et al ., 2015).…”

Section: Reconstructing Vegetation and Hydrological Changementioning

confidence: 99%

Biomarker proxies for reconstructing Quaternary climate and environmental change

McClymont,

Mackay,

Stevenson

et al. 2023

J Quaternary Science

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To reconstruct past environmental changes, a range of indirect or proxy approaches can be applied to Quaternary archives. Here, we review the complementary and novel insights that have been provided by the analysis of chemical fossils (biomarkers). Biomarkers have a biological source that can be highly specific (e.g. produced by a small group of organisms) or more general. We show that biomarkers are able to quantify key climate variables (particularly water and air temperature) and can provide qualitative evidence for changes in hydrology, vegetation, human–environment interactions and biogeochemical cycling. In many settings, biomarker proxies provide the opportunity to simultaneously reconstruct multiple climate or environmental variables, alongside complementary and long‐established approaches to palaeoenvironmental reconstruction. Multi‐proxy studies have provided rich sets of data to explore both the drivers and impacts of palaeoenvironmental change. As new biomarker proxies continue to be developed and refined, there is further potential to answer emerging questions for Quaternary science and environmental change.

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Arctic and sub-Arctic lake water δ2H and δ18O along a coastal-inland transect: Implications for interpreting water isotope proxy records

Kjellman

Thomas

Schomacker

2022

Journal of Hydrology

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Seasonal variability in temperature trends and atmospheric circulation systems during the Eemian (Last Interglacial) based on n-alkanes hydrogen isotopes from Northern Finland

Cited by 3 publications

References 99 publications

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H

Biomarker proxies for reconstructing Quaternary climate and environmental change

Arctic and sub-Arctic lake water δ2H and δ18O along a coastal-inland transect: Implications for interpreting water isotope proxy records

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Seasonal variability in temperature trends and atmospheric circulation systems during the Eemian (Last Interglacial) based on n-alkanes hydrogen isotopes from Northern Finland

Cited by 3 publications

References 99 publications

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ2H

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ2H

Biomarker proxies for reconstructing Quaternary climate and environmental change

Arctic and sub-Arctic lake water δ2H and δ18O along a coastal-inland transect: Implications for interpreting water isotope proxy records

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Product

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Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H

Seasonal precipitation variability on Svalbard inferred from Holocene sedimentary leaf wax δ²H