@article {525,
	title = {Paleolimnological records of recent glacier recession in the Rwenzori Mountains, Uganda-D. R. Congo},
	journal = {Journal of Paleolimnology},
	volume = {41},
	year = {2009},
	note = {id: 2048; PT: J; UT: WOS:000262651500002},
	pages = {253-271},
	abstract = {The status of tropical glaciers is enormously important to our understanding of past, present, and future climate change, yet lack of continuous quantitative records of alpine glacier extent on the highest mountains of tropical East Africa prior to the 20th century has left the timing and drivers of recent glacier recession in the region equivocal. Here we investigate recent changes (the last 150-700 years) in lacustrine sedimentation, glacier extent, and biogeochemical processes in the Rwenzori Mountains (Uganda- Democratic Republic of Congo) by comparing sedimentological (organic and siliciclastic component determined by loss-on-ignition; LOI) and organic geochemical profiles (carbon and nitrogen abundance, ratio, and isotopic composition of sedimentary organic matter) from lakes occupying presently glaciated catchments against similar profiles from lakes located in catchments lacking glaciers. The siliciclastic content of sediments in the {\textquoteright}glacial lakes{\textquoteright} significantly decreases towards the present, whereas {\textquoteright}non-glacial lakes{\textquoteright} generally show weak trends in their siliciclastic content over time, demonstrating that changes in the siliciclastic content of glacial lake sediments primarily record fluctuations in glacier extent. Radiometric dating of our sediment cores indicates that prior to their late 19th-century recession Rwenzori glaciers stood at expanded {\textquoteright}Little Ice Age{\textquoteright} positions for several centuries under a regionally dry climate regime, and that recession was underway by 1870 AD, during a regionally wet episode. These findings suggest that the influence of late 19th century reductions in precipitation in triggering Rwenzori glacier recession is weaker than previously thought. Our organic geochemical data indicate that glacier retreat has significantly affected carbon cycling in Afroalpine lakes, but trends in aquatic ecosystem functioning are variable among lakes and require more detailed analysis.},
	issn = {0921-2728},
	doi = {10.1007/s10933-008-9224-4},
	author = {Russell, J. and Eggermont, H. and Taylor, R. and Verschuren, D.}
}
@article {928,
	title = {Detection of silica-mediated dissolution of magnetic grains in sediments using FORC diagrams},
	journal = {Geophysical Research Letters},
	volume = {34},
	year = {2007},
	note = {182vvTimes Cited:3Cited References Count:8},
	month = {Jun 20},
	abstract = {Recently silica-mediated dissolution has been recognized as a potentially important factor influencing magnetic studies of marine and lacustrine sediments. Although direct evidence for the dissolution of magnetic particles in silica-rich environments is lacking, the process is expected to produce changes in the magnetic grain-size distribution, a hypothesis that is tested in this study on sediments from Lake Tanganyika, East Africa, using First Order Reversal Curves (FORCs). Results from different magnetic intensity zones within the studied samples clearly show changes in the grain-size distribution of magnetic minerals. In particular, zones with high biogenic silica content (BSi) correlated with depletion in fine-grained magnetic material, whereas zones with lower BSi showed no depletion. These results are consistent with the idea that silica-mediated dissolution results in the preferential removal of fine-grained magnetic material, and indicate that FORC diagrams are effective in characterizing silica-mediated dissolution in sediments.},
	keywords = {dissolution, FORC},
	issn = {0094-8276},
	doi = {10.1029/2007GL029984},
	author = {Wetter, L. and Verosub, K. and Russell, J.}
}
@article {643,
	title = {Mid-holocene climate change in Lake Bosumtwi, Ghana},
	journal = {Quaternary Research},
	volume = {60},
	year = {2003},
	note = {716arTimes Cited:43Cited References Count:39},
	month = {Sep},
	pages = {133-141},
	abstract = {Lake Bosumtwi is one of the most widely studied palaeoclimate archives in West Africa. Results from numerous AMS C-14 dates of samples from four piston cores from Lake Bosumtwi show that an abrupt sedimentary transition from a mid-Holocene sapropel to calcareous laminated muds occurred at about 3200 cal yr B.P. High-resolution analyses of the nitrogen isotopic composition of organic matter across this transition confirm its abrupt nature, and suggest that the change may signal a step toward increased aridity and intensified surface winds that affected western equatorial Africa from Ghana to the Congo basin. Northern and Eastern Africa experienced a similar abrupt shift toward aridity during the late Holocene, but at about 5000 cal yr B.P., a difference in timing that illustrates the regional nature of climate changes during the Holocene and the importance of feedback mechanisms in regulating Holocene climate variability. Furthermore, an abrupt change at about 3000 cal yr B.P. occurs at several sites adjacent to the tropical and subtropical Atlantic, which may hint at major changes in the surface temperatures of the tropical Atlantic and/or Pacific at this time. (C) 2003 University of Washington. Published by Elsevier Inc. All rights reserved.},
	issn = {0033-5894},
	doi = {10.1016/S0033-5894(03)00065-6},
	author = {Russell, J. and Talbot, M. R. and Haskell, B. J.}
}
