Outputs (60)

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 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.

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 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.

Isotope offsets in marine diatom δ18O 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 δ18O 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 δ18O 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 δ18O in palaeoceanography
Journal Article
Swann, G. E., & Leng, M. J. A review of diatom δ18O in palaeoceanography. Quaternary Science Reviews, 28(5-6), https://doi.org/10.1016/j.quascirev.2008.11.002

Measurements of diatom oxygen isotopes (δ18Odiatom) hold the potential to provide an important additional source of palaeoceanographic information in regions depleted in carbonates. However, despite analyses of δ18Odiatom being carried out since the... Read More about A review of diatom δ18O in palaeoceanography.