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Outputs (55)

A global compilation of diatom silica oxygen isotope records from lake sediment – trends and implications for climate reconstruction (2024)
Journal Article
Meister, P., Alexandre, A., Bailey, H., Barker, P., Biskaborn, B. K., Broadman, E., …Meyer, H. (2024). A global compilation of diatom silica oxygen isotope records from lake sediment – trends and implications for climate reconstruction. Climate of the Past, 20(2), 363-392. https://doi.org/10.5194/cp-20-363-2024

Oxygen isotopes in biogenic silica (δ18OBSi) from lake sediments allow for quantitative reconstruction of past hydroclimate and proxy-model comparison in terrestrial environments. The signals of individual records have been attributed to different fa... Read More about A global compilation of diatom silica oxygen isotope records from lake sediment – trends and implications for climate reconstruction.

Sea level controls on the provenance of fine-grained sediments in the Xisha Trough, northwestern South China Sea over the last ~30 ka (2023)
Journal Article
Zhang, Q., Swann, G. E., Liu, J., Gao, W., Cui, Z., Li, G., …Li, W. (2023). Sea level controls on the provenance of fine-grained sediments in the Xisha Trough, northwestern South China Sea over the last ~30 ka. Marine Geology, 466, Article 107184. https://doi.org/10.1016/j.margeo.2023.107184

The Xisha Trough situated in the northwestern South China Sea (SCS), plays a pivotal role in transporting sediments from the Red River into the deep-sea basin of the SCS, and thus is a critical place to examine variations in source-to-sink process of... Read More about Sea level controls on the provenance of fine-grained sediments in the Xisha Trough, northwestern South China Sea over the last ~30 ka.

Climate Evolution Through the Onset and Intensification of Northern Hemisphere Glaciation (2023)
Journal Article
McClymont, E. L., Ho, S. L., Ford, H. L., Bailey, I., Berke, M. A., Bolton, C. T., …Tangunan, D. (2023). Climate Evolution Through the Onset and Intensification of Northern Hemisphere Glaciation. Reviews of Geophysics, 61(3), Article e2022RG000793. https://doi.org/10.1029/2022rg000793

The Pliocene Epoch (∼5.3–2.6 million years ago, Ma) was characterized by a warmer than present climate with smaller Northern Hemisphere ice sheets, and offers an example of a climate system in long-term equilibrium with current or predicted near-futu... Read More about Climate Evolution Through the Onset and Intensification of Northern Hemisphere Glaciation.

An effective method to extract and purify radiolaria from tropical marine sediments (2023)
Journal Article
Zhang, Q., & Swann, G. E. (2023). An effective method to extract and purify radiolaria from tropical marine sediments. Frontiers in Marine Science, 10, Article 1150518. https://doi.org/10.3389/fmars.2023.1150518

Radiolaria are the primary contributors to biogenic opal in the tropical ocean, and their isotope compositions are potentially useful tool for reconstructing the silicon cycle in mid-depth waters. To date little attention has been paid to their isoto... Read More about An effective method to extract and purify radiolaria from tropical marine sediments.

Isotope sample preparation of diatoms for paleoenvironmental research (2023)
Journal Article
Swann, G. E., & Snelling, A. (2023). Isotope sample preparation of diatoms for paleoenvironmental research. PLoS ONE, 18(2), Article e0281511. https://doi.org/10.1371/journal.pone.0281511

Isotopes in diatoms are increasingly used in palaeoenvironmental studies in both lacustrine and marine settings, enabling the reconstruction of a range of variables including temperature, precipitation, salinity, glacial discharge, carbon dynamics an... Read More about Isotope sample preparation of diatoms for paleoenvironmental research.

Ecosystem deterioration in the middle Yangtze floodplain lakes over the last two centuries: Evidence from sedimentary pigments (2023)
Journal Article
Zeng, L., Swann, G. E., Leng, M. J., Chen, X., Ji, J., Huang, X., & McGowan, S. (2023). Ecosystem deterioration in the middle Yangtze floodplain lakes over the last two centuries: Evidence from sedimentary pigments. Quaternary Science Reviews, 302, Article 107954. https://doi.org/10.1016/j.quascirev.2023.107954

Water quality of floodplain lakes in the Yangtze region which supports ca. 450 million people is being severely compromised by nutrient pollution, climate change and dam installation resulting from intensive socio-economic development. However, due t... Read More about Ecosystem deterioration in the middle Yangtze floodplain lakes over the last two centuries: Evidence from sedimentary pigments.

Eutrophication has a greater influence on floodplain lake carbon cycling than dam installation across the middle Yangtze region (2022)
Journal Article
Zeng, L., McGowan, S., Swann, G. E., Leng, M. J., & Chen, X. (2022). Eutrophication has a greater influence on floodplain lake carbon cycling than dam installation across the middle Yangtze region. Journal of Hydrology, 614, Article 128510. https://doi.org/10.1016/j.jhydrol.2022.128510

Carbon cycling in shallow floodplain lakes is complex due to variability in delivery of flood-derived allochthonous organic matter (OM). Human activities have potential to significantly modify the carbon balance of lakes by damming which restricts ex... Read More about Eutrophication has a greater influence on floodplain lake carbon cycling than dam installation across the middle Yangtze region.

Nutrient availability in the North Pacific region not primarily driven by climate through the Quaternary (2022)
Journal Article
Snelling, A. M., Swann, G. E., Pashley, V., Lacey, J. H., Horstwood, M. S., & Leng, M. J. (2022). Nutrient availability in the North Pacific region not primarily driven by climate through the Quaternary. Palaeogeography, Palaeoclimatology, Palaeoecology, 601, Article 111109. https://doi.org/10.1016/j.palaeo.2022.111109

The subarctic North Pacific Ocean is a relatively understudied region in terms of palaeoclimate, limiting our understanding of how the region has both driven and responded to palaeoenvironmental events. Today, the subarctic North Pacific Ocean is mar... Read More about Nutrient availability in the North Pacific region not primarily driven by climate through the Quaternary.

Long-term trends in diatom diversity and palaeoproductivity: a 16000-year multidecadal record from Lake Baikal, southern Siberia (2022)
Journal Article
Mackay, A. W., Felde, V. A., Morley, D. W., Piotrowska, N., Rioual, P., Seddon, A. W., & Swann, G. E. (2022). Long-term trends in diatom diversity and palaeoproductivity: a 16000-year multidecadal record from Lake Baikal, southern Siberia. Climate of the Past, 18(2), 363-380. https://doi.org/10.5194/cp-18-363-2022

Biological diversity is inextricably linked to community stability and ecosystem functioning, but our understanding of these relationships in freshwater ecosystems is largely based on short-term observational, experimental, and modelling approaches.... Read More about Long-term trends in diatom diversity and palaeoproductivity: a 16000-year multidecadal record from Lake Baikal, southern Siberia.

Silicic Acid Cycling in the Bering Sea During the Mid-Pleistocene Transition (2022)
Journal Article
Worne, S., Swann, G. E., Kender, S., Lacey, J. H., & Leng, M. J. (2022). Silicic Acid Cycling in the Bering Sea During the Mid-Pleistocene Transition. Paleoceanography and Paleoclimatology, 37(2), Article e2021PA004284. https://doi.org/10.1029/2021PA004284

The rate of deep-ocean carbon burial is considered important for modulating glacial-interglacial atmospheric CO2 concentrations and global climate during the Quaternary. It has been suggested that glacial iron fertilization and increased efficiency o... Read More about Silicic Acid Cycling in the Bering Sea During the Mid-Pleistocene Transition.

Anthropocene climate warming enhances autochthonous carbon cycling in an upland Arctic lake, Disko Island, West Greenland (2021)
Journal Article
Stevenson, M. A., Mcgowan, S., Pearson, E. J., Swann, G. E., Leng, M. J., Jones, V. J., …Whiteford, E. (2021). Anthropocene climate warming enhances autochthonous carbon cycling in an upland Arctic lake, Disko Island, West Greenland. Biogeosciences, 18(8), 2465-2485. https://doi.org/10.5194/bg-18-2465-2021

The Arctic is rapidly changing, disrupting biogeochemical cycles and the processing, delivery and sedimentation of carbon (C), in linked terrestrial-aquatic systems. In this investigation, we coupled a hydrogeomorphic assessment of catchment soils, s... Read More about Anthropocene climate warming enhances autochthonous carbon cycling in an upland Arctic lake, Disko Island, West Greenland.

Sea-ice response to climate change in the Bering Sea during the Mid-Pleistocene Transition (2021)
Journal Article
Worne, S., Stroynowski, Z., Kender, S., & Swann, G. (2021). Sea-ice response to climate change in the Bering Sea during the Mid-Pleistocene Transition. Quaternary Science Reviews, 259, Article 106918. https://doi.org/10.1016/j.quascirev.2021.106918

Sea-ice is believed to be an important control on climatic changes through the Mid-Pleistocene Transition (MPT; 0.6-1.2 Ma). However, the low resolution/short timescale of existing reconstructions prevents a full evaluation of these dynamics. Here, d... Read More about Sea-ice response to climate change in the Bering Sea during the Mid-Pleistocene Transition.

Changing nutrient cycling in Lake Baikal, the world’s oldest lake (2020)
Journal Article
Swann, G. E. A., Panizzo, V. N., Piccolroaz, S., Pashley, V., Horstwood, M., Roberts, S., …Mackay, A. W. (2020). Changing nutrient cycling in Lake Baikal, the world’s oldest lake. Proceedings of the National Academy of Sciences, 117(44), 27211-27217. https://doi.org/10.1073/pnas.2013181117

Copyright © 2020 the Author(s). Published by PNAS. Lake Baikal, lying in a rift zone in southeastern Siberia, is the world's oldest, deepest, and most voluminous lake that began to form over 30 million years ago. Cited as the "most outstanding exampl... Read More about Changing nutrient cycling in Lake Baikal, the world’s oldest lake.

Glacial discharge into the subarctic Northeast Pacific Ocean during the last glacial (2020)
Journal Article
Swann, G. (2020). Glacial discharge into the subarctic Northeast Pacific Ocean during the last glacial. Global and Planetary Change, 194, Article 103301. https://doi.org/10.1016/j.gloplacha.2020.103301

Understanding the response of the climate to abrupt changes in the Earth system represents a key objective in paleoclimatology. Heinrich events in the last glacial, during which significant amounts of glacial discharge entered the North Atlantic Ocea... Read More about Glacial discharge into the subarctic Northeast Pacific Ocean during the last glacial.

Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago (2020)
Journal Article
McClymont, E. L., Ford, H. L., Ho, S. L., Tindall, J. C., Haywood, A. M., Alonso-Garcia, M., …Zhang, Z. (2020). Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago. Climate of the Past, 16(4), 1599-1615. https://doi.org/10.5194/cp-16-1599-2020

A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record offers an opportunity to underst... Read More about Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago.

Reduced upwelling of nutrient and carbon-rich water in the subarctic Pacific during the Mid-Pleistocene Transition (2020)
Journal Article
Worne, S., Kender, S., Swann, G. E., Leng, M. J., & Ravelo, A. C. (2020). Reduced upwelling of nutrient and carbon-rich water in the subarctic Pacific during the Mid-Pleistocene Transition. Palaeogeography, Palaeoclimatology, Palaeoecology, 555, Article 109845. https://doi.org/10.1016/j.palaeo.2020.109845

© 2020 Reduction in atmospheric pCO2 has been hypothesised as a causal mechanism for the Mid-Pleistocene Transition (MPT), which saw global cooling and increased duration of glacials between 0.6 and 1.2 Ma. Sea ice-modulated high latitude upwelling a... Read More about Reduced upwelling of nutrient and carbon-rich water in the subarctic Pacific during the Mid-Pleistocene Transition.

The pH dependency of the boron isotopic composition of diatom opal (Thalassiosira weissflogii) (2020)
Journal Article
Donald, H. K., Foster, G. L., Fröhberg, N., Swann, G. E. A., Poulton, A. J., Moore, C. M., & Humphreys, M. P. (2020). The pH dependency of the boron isotopic composition of diatom opal (Thalassiosira weissflogii). Biogeosciences, 17(10), 2825-2837. https://doi.org/10.5194/bg-17-2825-2020

The high-latitude oceans are key areas of carbon and heat exchange between the atmosphere and the ocean. As such, they are a focus of both modern oceanographic and palaeoclimate research. However, most palaeoclimate proxies that could provide a long-... Read More about The pH dependency of the boron isotopic composition of diatom opal (Thalassiosira weissflogii).

Mercury loading within the Selenga River basin and Lake Baikal, Siberia (2019)
Journal Article
Roberts, S., Adams, J. K., Mackay, A. W., Swann, G. E. A., McGowan, S., Rose, N. L., …Shchetnikov, A. A. (2020). Mercury loading within the Selenga River basin and Lake Baikal, Siberia. Environmental Pollution, 259, Article 113814. https://doi.org/10.1016/j.envpol.2019.113814

Mercury (Hg) loading in Lake Baikal, a UNESCO world heritage site, is growing and poses a serious health concern to the lake’s ecosystem due to the ability of Hg to transform into a toxic form, known as methylmercury (MeHg). Monitoring of Hg into Lak... Read More about Mercury loading within the Selenga River basin and Lake Baikal, Siberia.

PaCTS 1.0: A Crowdsourced Reporting Standard for Paleoclimate Data (2019)
Journal Article
Khider, D., Emile-Geay, J., McKay, N. P., Gil, Y., Garijo, D., Ratnakar, V., …Zhou, Y. (2019). PaCTS 1.0: A Crowdsourced Reporting Standard for Paleoclimate Data. Paleoceanography and Paleoclimatology, 34(10), 1570-1596. https://doi.org/10.1029/2019PA003632

The progress of science is tied to the standardization of measurements, instruments, and data. This is especially true in the Big Data age, where analyzing large data volumes critically hinges on the data being standardized. Accordingly, the lack of... Read More about PaCTS 1.0: A Crowdsourced Reporting Standard for Paleoclimate Data.

Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years (2019)
Journal Article
Worne, S., Kender, S., Swann, G. E., Leng, M. J., & Ravelo, A. C. (2019). Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years. Earth and Planetary Science Letters, 522, 87-97. https://doi.org/10.1016/j.epsl.2019.06.028

High latitude deep water upwelling has the potential to control global climate over glacial timescales through the biological pump and ocean-atmosphere CO2 exchange. However, there is currently a lack of continuous long nutrient upwelling records wit... Read More about Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years.

Closure of the Bering Strait caused Mid-Pleistocene Transition cooling (2018)
Journal Article
Kender, S., Ravelo, A. C., Worne, S., Swann, G. E. A., Leng, M. J., Asahi, H., …Hall, I. R. (2018). Closure of the Bering Strait caused Mid-Pleistocene Transition cooling. Nature Communications, 9(1), Article 5386. https://doi.org/10.1038/s41467-018-07828-0

The Mid-Pleistocene Transition (MPT) is characterised by cooling and lengthening glacial cycles from 600–1200 ka, thought to be driven by reductions in glacial CO2 in particular from ~900 ka onwards. Reduced high latitude upwelling, a process that re... Read More about Closure of the Bering Strait caused Mid-Pleistocene Transition cooling.

Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia (2018)
Journal Article
Roberts, S., Swann, G., McGowan, S., Panizzo, V., Vologina, E., Sturm, M., & Mackay, A. (2018). Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia. PLoS ONE, 13(12), Article e020876. https://doi.org/10.1371/journal.pone.0208765

Lake Baikal has been experiencing limnological changes from recent atmospheric warming since the 1950s, with rising lake water temperatures, reduced ice cover duration and reduced lake surface-water mixing due to stronger thermal stratification. This... Read More about Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia.

Recent ecological change in ancient lakes (2018)
Journal Article
Hampton, S. E., McGowan, S., Ozersky, T., Virdis, S. G. P., Vu, T. T., Spanbauer, T. L., …Fritz, S. C. (2018). Recent ecological change in ancient lakes. Limnology and Oceanography, 63(5), 2277-2304. https://doi.org/10.1002/lno.10938

Ancient lakes are among the best archivists of past environmental change, having experienced more than one full glacial cycle, a wide range of climatic conditions, tectonic events, and long association with human settlements. These lakes not only rec... Read More about Recent ecological change in ancient lakes.

Modelling silicon supply during the Last Interglacial (MIS 5e) at Lake Baikal (2018)
Journal Article
Panizzo, V., Swann, G., Mackay, A., Pashley, V., & Horstwood, M. (2018). Modelling silicon supply during the Last Interglacial (MIS 5e) at Lake Baikal. Quaternary Science Reviews, 190, https://doi.org/10.1016/j.quascirev.2018.04.006

Limnological reconstructions of primary productivity have demonstrated its response over Quaternary timescales to drivers such as climate change, landscape evolution and lake ontogeny. In particular, sediments from Lake Baikal, Siberia, provide a val... Read More about Modelling silicon supply during the Last Interglacial (MIS 5e) at Lake Baikal.

Lake Baikal isotope records of Holocene Central Asian precipitation (2018)
Journal Article
Swann, G. E., Mackay, A. W., Vologina, E., Jones, M. D., Panizzo, V., Leng, M. J., …Sturm, M. (2018). Lake Baikal isotope records of Holocene Central Asian precipitation. Quaternary Science Reviews, 189, https://doi.org/10.1016/j.quascirev.2018.04.013

Climate models currently provide conflicting predictions of future climate change across Central Asia. With concern over the potential for a change in water availability to impact communities and ecosystems across the region, an understanding of hist... Read More about Lake Baikal isotope records of Holocene Central Asian precipitation.

Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean (2018)
Journal Article
Swann, G., Kendrick, C., Dickson, A., & Worne, S. (in press). Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean. Paleoceanography and Paleoclimatology, https://doi.org/10.1029/2017PA003296

The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number... Read More about Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean.

Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication (2018)
Journal Article
Panizzo, V., Roberts, S., Swann, G. E., McGowan, S., Mackay, A. W., Vologina, E., …Horstwood, M. S. (2018). Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication. Limnology and Oceanography, 63(4), 1562-1578. https://doi.org/10.1002/lno.10792

Recent research has highlighted how Lake Baikal, Siberia, has responded to the direct and indirect effects of climate change (e.g., ice-cover duration), nutrient loading, and pollution, manifesting as changes in phytoplankton/zooplankton populations,... Read More about Spatial differences in dissolved silicon utilisation in Lake Baikal, Siberia: examining the impact of high diatom biomass events and eutrophication.

A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements (2018)
Journal Article
Sutton, J. N., André, L., Cardinal, D., Conley, D. J., de Souza, G. F., Dean, J. R., …Swann, G. E. (2018). A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements. Frontiers in Earth Science, 5, Article 112. https://doi.org/10.3389/feart.2017.00112

Silicon (Si) is the second most abundant element in the Earth’s crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in the oceans. Deve... Read More about A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements.

"Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths (2018)
Journal Article
Dejardin, R., Kender, S., Allen, C. S., Leng, M. J., Swann, G. E., & Peck, V. L. (2018). "Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths. Journal of Micropalaeontology, 37(1), 25-71. https://doi.org/10.5194/jm-37-25-2018

It is widely held that benthic foraminifera exhibit species-specific calcification depth preferences, with their tests recording sediment pore water chemistry at that depth (i.e. stable isotope and trace metal compositions). This assumed depth habita... Read More about "Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths.

Constraining modern day silicon cycling in Lake Baikal (2017)
Journal Article
Panizzo, V., Swann, G. E., Mackay, A. W., Vologina, E., Alleman, L., Andre, L., …Horstwood, M. S. (in press). Constraining modern day silicon cycling in Lake Baikal. Global Biogeochemical Cycles, 31(3), https://doi.org/10.1002/2016GB005518

Constraining the continental silicon cycle is a key requirement in attempts to understand both nutrient fluxes to the ocean and linkages between silicon and carbon cycling over different timescales. Silicon isotope data of dissolved silica (?30SiDSi)... Read More about Constraining modern day silicon cycling in Lake Baikal.

Temporal controls on silicic acid utilisation along the West Antarctic Peninsula (2017)
Journal Article
Swann, G. E., Pike, J., Leng, M. J., Sloane, H. J., & Snelling, A. M. (2017). Temporal controls on silicic acid utilisation along the West Antarctic Peninsula. Nature Communications, 14645, https://doi.org/10.1038/ncomms14645

The impact of climatic change along the Antarctica Peninsula has been widely debated in light of atmospheric/oceanic warming and increases in glacial melt over the past half century. Particular concern exists over the impact of these changes on marin... Read More about Temporal controls on silicic acid utilisation along the West Antarctic Peninsula.

Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia (2016)
Journal Article
Mackay, A. W., Seddon, A., Leng, M. J., Heumann, G., Morley, D., Piotrowska, N., …Swann, G. E. (2017). Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia. Global Change Biology, 23(5), https://doi.org/10.1111/gcb.13583

The forest–steppe ecotone in southern Siberia is highly sensitive to climate change; global warming is expected to push the ecotone northwards, at the same time resulting in degradation of the underlying permafrost. To gain a deeper understanding of... Read More about Holocene carbon dynamics at the forest – steppe ecotone of southern Siberia.

Ecology under lake ice (2016)
Journal Article
Hampton, S. E., Galloway, A. W., Powers, S. M., Ozersky, T., Woo, K. H., Batt, R. D., …Swann, G. E. (2017). Ecology under lake ice. Ecology Letters, 20(1), 98-111. https://doi.org/10.1111/ele.12699

Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer "growing... Read More about Ecology under lake ice.

Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation (2016)
Journal Article
Swann, G. E., Snelling, A. M., & Pike, J. (in press). Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation. Paleoceanography, 31(9), https://doi.org/10.1002/2016PA002978

The Bering Sea is one of the most biologically productive regions in the marine system and plays a key role in regulating the flow of waters to the Arctic Ocean and into the subarctic North Pacific Ocean. Cores from IODP Expedition 323 to the Bering... Read More about Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere glaciation.

Insights into the transfer of silicon isotopes into the sediment record (2016)
Journal Article
Panizzo, V. N., Swann, G. E., Mackay, A., Vologina, E., Sturm, M., Pashley, V., & Horstwood, M. (2016). Insights into the transfer of silicon isotopes into the sediment record. Biogeosciences, 13(1), 147-157. https://doi.org/10.5194/bg-13-147-2016

The first δ30Si diatom data from lacustrine sediment traps are presented from Lake Baikal, Siberia. Data are compared with March surface water (upper 180 m) δ30SiDSi compositions for which a mean value of +2.28‰ ±  0.09 (95 % confidence) is derived.... Read More about Insights into the transfer of silicon isotopes into the sediment record.

An experiment to assess the effects of diatom dissolution on oxygen isotope ratios (2015)
Journal Article
Smith, A. C., Leng, M. J., Swann, G. E., Barker, P. A., Mackay, A. W., Ryves, D. B., …Hems, M. (2016). An experiment to assess the effects of diatom dissolution on oxygen isotope ratios. Rapid Communications in Mass Spectrometry, 30(2), 293-300. https://doi.org/10.1002/rcm.7446

Rationale: Current studies which use the oxygen isotope composition from diatom silica (δ18Odiatom) as a palaeoclimate proxy assume that the δ18Odiatom value reflects the isotopic composition of the water in which the diatom formed. However, diatoms... Read More about An experiment to assess the effects of diatom dissolution on oxygen isotope ratios.

Photic zone changes in the north-west Pacific Ocean from MIS 4–5e (2015)
Journal Article
Swann, G., & Snelling, A. M. (2015). Photic zone changes in the north-west Pacific Ocean from MIS 4–5e. Climate of the Past, 11(1), https://doi.org/10.5194/cp-11-15-2015

In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of ?13C, ?18O ?30Si (?13Cdiatom, ?18Odiatom and ?30Sidiatom) are presented alongside exi... Read More about Photic zone changes in the north-west Pacific Ocean from MIS 4–5e.

Silica stable isotopes and silicification in a carnivorous sponge Asbestopluma sp. (2015)
Journal Article
Hendry, K., Swann, G. E., Leng, M. J., Sloane, H. J., Goodwin, C., Berman, J., & Maldonado, M. (2015). Silica stable isotopes and silicification in a carnivorous sponge Asbestopluma sp. Biogeosciences, 12, https://doi.org/10.5194/bg-12-3489-2015

The stable isotope composition of benthic sponge spicule silica is a potential source of palaeoceanographic information about past deep seawater chemistry. The silicon isotope composition of spicules has been shown to relate to the silicic acid conce... Read More about Silica stable isotopes and silicification in a carnivorous sponge Asbestopluma sp..

Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions (2014)
Journal Article
Snelling, A. M., Swann, G. E. A., Pike, J., & Leng, M. J. (2014). Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions. Climate of the Past Discussions, 10(5), 1837-1842. https://doi.org/10.5194/cpd-10-2087-2014

Oxygen isotope analyses of different size fractions of Pliocene diatoms (δ18Odiatom) from the Bering Sea show no evidence of an isotope offset and support the use of bulk diatom species samples for palaeoceanographic reconstructions. Additional sampl... Read More about Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions.

Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions (2014)
Journal Article
Snelling, A. M., Swann, G., Pike, J., & Leng, M. J. (2014). Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions. Climate of the Past, 10, https://doi.org/10.5194/cp-10-1837-2014

Oxygen isotope analyses of different size fractions of Pliocene diatoms (δ18Odiatom) from the Bering Sea show no evidence of an isotope offset and support the use of bulk diatom species samples for palaeoceanographic reconstructions. Additional sampl... Read More about Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions.

Glacial discharge along the west Antarctic Peninsula during the Holocene (2013)
Journal Article
Pike, J., Swann, G. E., Leng, M. J., & Snelling, A. M. (2013). Glacial discharge along the west Antarctic Peninsula during the Holocene. Nature Geoscience, 6, https://doi.org/10.1038/ngeo1703

The causes for rising temperatures along the Antarctic Peninsula during the late Holocene have been debated, particularly in light of instrumental records of warming over the past decades. Suggested mechanisms range from upwelling of warm deep waters... Read More about Glacial discharge along the west Antarctic Peninsula during the Holocene.

Seasonally resolved diatom ?18O records from the west Antarctic Peninsula over the last deglaciation (2013)
Journal Article
Swann, G. E., Pike, J., Snelling, A. M., Leng, M. J., & Williams, M. C. (2013). Seasonally resolved diatom ?18O records from the west Antarctic Peninsula over the last deglaciation. Earth and Planetary Science Letters, 364, https://doi.org/10.1016/j.epsl.2012.12.016

Understanding the response of the Antarctic ice sheets during the rapid climatic change that accompanied the last deglaciation has implications for establishing the susceptibility of these regions to future 21st Century warming. A unique diatom δ18O... Read More about Seasonally resolved diatom ?18O records from the west Antarctic Peninsula over the last deglaciation.

Application of Fourier Transform Infrared Spectroscopy (FTIR) for assessing biogenic silica sample purity in geochemical analyses and palaeoenvironmental research (2011)
Journal Article
Swann, G. E., & Patwardhan, S. V. (2011). Application of Fourier Transform Infrared Spectroscopy (FTIR) for assessing biogenic silica sample purity in geochemical analyses and palaeoenvironmental research. Climate of the Past, 7(1), https://doi.org/10.5194/cp-7-65-2011

The development of a rapid and non-destructive method to assess purity levels in samples of biogenic silica prior to geochemical/isotope analysis remains a key objective in improving both the quality and use of such data in environmental and palaeocl... Read More about Application of Fourier Transform Infrared Spectroscopy (FTIR) for assessing biogenic silica sample purity in geochemical analyses and palaeoenvironmental research.

A combined oxygen and silicon diatom isotope record of Late Quaternary change in Lake El'gygytgyn, North East Siberia (2010)
Journal Article
Swann, G. E., Leng, M. J., Juschus, O., Melles, M., Brigham-Grette, J., & Sloane, H. J. (2010). A combined oxygen and silicon diatom isotope record of Late Quaternary change in Lake El'gygytgyn, North East Siberia. Quaternary Science Reviews, 29(5-6), https://doi.org/10.1016/j.quascirev.2009.11.024

Determining the response of sites within the Arctic Circle to long-term climatic change remains an essential pre-requisite for assessing the susceptibility of these regions to future global warming and Arctic amplification. To date, existing records... Read More about A combined oxygen and silicon diatom isotope record of Late Quaternary change in Lake El'gygytgyn, North East Siberia.

Salinity changes in the North West Pacific Ocean during the late Pliocene/early Quaternary from 2.73 Ma to 2.52 Ma (2010)
Journal Article
Swann, G. E. (2010). Salinity changes in the North West Pacific Ocean during the late Pliocene/early Quaternary from 2.73 Ma to 2.52 Ma. Earth and Planetary Science Letters, 297(1-2), https://doi.org/10.1016/j.epsl.2010.06.035

Recent research has increasingly advocated a role for the North Pacific Ocean in modulating global climatic changes over both the last glacial cycle and further back into the geological record. Here a diatom δ18O record is presented from Ocean Drilli... Read More about Salinity changes in the North West Pacific Ocean during the late Pliocene/early Quaternary from 2.73 Ma to 2.52 Ma.

A comparison of the Si/Al and Si/time wet-alkaline digestion methods for measurement of biogenic silica in lake sediments (2010)
Journal Article
Swann, G. E. (2010). A comparison of the Si/Al and Si/time wet-alkaline digestion methods for measurement of biogenic silica in lake sediments. Journal of Paleolimnology, 44(2), https://doi.org/10.1007/s10933-009-9308-9

Existing techniques for measuring sediment Biogenic Silica (BSi) concentrations rely largely on conventional (Si-only) wet-alkaline digestion methods. Although results have provided detailed palaeoenvironmental information, potential errors can arise... Read More about A comparison of the Si/Al and Si/time wet-alkaline digestion methods for measurement of biogenic silica in lake sediments.

Isotope offsets in marine diatom ?18O over the last 200 ka (2008)
Journal Article
Swann, G. E., Leng, M. J., Sloane, H. J., & Maslin, M. A. (2008). Isotope offsets in marine diatom ?18O over the last 200 ka. Journal of Quaternary Science, 23(4), https://doi.org/10.1002/jqs.1185

Previous work has suggested that a species effect may be present in diatom oxygen isotope ratios (δ18Odiatom). While predominantly attributed to be a size related species effect, currently the precise mechanism remains unknown. Here, two size fractio... Read More about Isotope offsets in marine diatom ?18O over the last 200 ka.

Diatom oxygen isotopes: evidence of a species effect in the sediment record (2007)
Journal Article
Swann, G. E., Leng, M. J., Sloane, H. J., Maslin, M. A., & Onodera, J. (2007). Diatom oxygen isotopes: evidence of a species effect in the sediment record. Geochemistry, Geophysics, Geosystems, 8(6), Article Q06012. https://doi.org/10.1029/2006GC001535

Diatom oxygen isotope measurements are commonly made on bulk mixed species assemblages due to the difficulty in purifying and separating individual taxa. As such, it is essential to understand processes in diatoms which may lead to isotope offsets bo... Read More about Diatom oxygen isotopes: evidence of a species effect in the sediment record.

Potential limitations of biogenic silica as an indicator of abrupt climate change in Lake Baikal, Russia (2006)
Journal Article
Swann, G. E., & Mackay, A. W. (2006). Potential limitations of biogenic silica as an indicator of abrupt climate change in Lake Baikal, Russia. Journal of Paleolimnology, 36(1), https://doi.org/10.1007/s10933-006-0005-7

Biogenic Silica (BSi) has been one of the most important proxies for determining the palaeoclimate from Lake Baikal over glacial-interglacial cycles. Concentrations (calculated through a 1% Na2CO3 wet-alkaline digestion) at a site in the north basin,... Read More about Potential limitations of biogenic silica as an indicator of abrupt climate change in Lake Baikal, Russia.

Diatom D18O evidence for the development of the modern halocline system in the subarctic northwest Pacific at the onset of major Northern Hemisphere glaciation (2006)
Journal Article
Swann, G. E., Maslin, M. A., Leng, M. J., Sloane, H. J., & Haug, G. H. (2006). Diatom D18O evidence for the development of the modern halocline system in the subarctic northwest Pacific at the onset of major Northern Hemisphere glaciation. Paleoceanography, 21(PA1009), https://doi.org/10.1029/2005PA001147

Establishing a time frame for the development of the modern halocline and stratified water column in the subarctic North Pacific has significant paleoclimatic implications. Here we present a d18O(diatom) record consisting of only two species that rep... Read More about Diatom D18O evidence for the development of the modern halocline system in the subarctic northwest Pacific at the onset of major Northern Hemisphere glaciation.

Climatic change in Central Asia during MIS 3/2: a case study using biological responses from Lake Baikal (2005)
Journal Article
Swann, G. E., Mackay, A. W., Leng, M. J., & Demory, F. (2005). Climatic change in Central Asia during MIS 3/2: a case study using biological responses from Lake Baikal. Global and Planetary Change, 44(1-4), https://doi.org/10.1016/j.gloplacha.2004.09.019

A Marine Isotope Stage (MIS) 3/early MIS 2 section from a structural high along the east coast of the North Basin of Lake Baikal was analysed for diatoms, C/N ratios, and organic carbon isotope ratios. Diatoms were present throughout MIS 3 and early... Read More about Climatic change in Central Asia during MIS 3/2: a case study using biological responses from Lake Baikal.

A review of diatom ?18O in palaeoceanography
Journal Article
Swann, G. E., & Leng, M. J. A review of diatom ?18O in palaeoceanography. Quaternary Science Reviews, 28(5-6), https://doi.org/10.1016/j.quascirev.2008.11.002

Measurements of diatom oxygen isotopes (?18Odiatom) hold the potential to provide an important additional source of palaeoceanographic information in regions depleted in carbonates. However, despite analyses of ?18Odiatom being carried out since the... Read More about A review of diatom ?18O in palaeoceanography.