Papers

Submitted

Shanahan, T.M., N. McKay, K.A. Hughen, J.T. Overpeck, B. Otto-Bliesner, J.A. Peck, C. Scholz, C.W. Heil, J. King.(review) The African Humid Period and the complexity of radiatively-driven monsoon. Nature Geoscience.

*Santillan, E., P. Bennett, T.M. Shanahan, (review) Isolation and Characterization of a Novel CO2-Tolerant Lactobacillus Strain from Crystal Geyser, UT. Environmental Microbiology

*Anderson, V.J. T.M. Shanahan, J.E. Saylor, B.K. Horton (review). Paleoelevation records from lipid biomarkers: Application to the tropical Andes, GSA Bulletin.

*Fornace, K.L., K.A. Hughen, T.M. Shanahan, S.C. Fritz, P.A. Baker, S.P. Sylva (review) A 60,000 year record of hydrologic variability in the Central Andes from dD of leaf waxes, Earth and Planetary Science Letters.

2013

*Anderson, V.J. T.M. Shanahan, J.E. Saylor, B.K. Horton A.R. Mora (2014), Sources of local and regional variability in the MBT’/CBT paleotemperature proxy: Insights from a modern elevation transect across the Eastern Cordillera of Colombia. Organic Geochemistry. v. 69, pp.42-51.

Shanahan, T.M., Hughen, K.A., Van Mooy, B.A.S. 2013, Temperature sensitivity of branched and isoprenoid GDGTs in Arctic lakes. Organic Geochemistry, v. 64, pp. 119-128.

Shanahan, T.M., K.A. Hughen, L. Ampel, P.E. Sauer. 2013, Environmental controls on the 2H/1H values of terrestrial leaf waxes in the Eastern Canadian Arctic. Geochimica et Cosmochimica, v. 119, pp. 286-301.

PAGES 2K Consortium. 2013, Continental-scale temperature variability over the Common Era. Nature Geoscience, v. 6, pp. 339-346.

Nicholson, S.E., D.J. Nash, B.M. Chase, S.W. Grab, D. Verschuren, T.M. Shanahan, A. Asrat, A.-M. Lezine, M. Umer. 2013. Temperature variability over Africa during the last 2000 years, The Holocene, v.23, pp. 1085-1094.

Shanahan, T.M., N. McKay, J.T. Overpeck, J.A. Peck, C. Scholz, C.W. Heil, J. King. 2013. Spatial and temporal variability in sedimentological and geochemical properties of sediments from an anoxic crater lake: implications for paleoenvironmental reconstructions. Palaeogeography, Palaeoclimatology, Palaeoecology. v. 374, pp. 96-109.

*Stoynova, V., T.M. Shanahan, K.A. Hughen, A. deVernal. 2013 Insights into Circum-Arctic Sea Ice Variability from Molecular Geochemistry. Quaternary Science Reviews. v. 79, pp. 63-73

Shanahan, T.M., J.A. Peck, N. McKay, C.W. Heil, J. King, S.L. Forman, D.L. Hoffmann, D.A. Richards, J.T. Overpeck, C. Scholz. 2013. Age models for long lacustrine sediment records using multiple dating approaches – an example from Lake Bosumtwi, Ghana. Quaternary Geochronology, v. 15, pp. 47-60.

2012

Shanahan, T.M., J.W. Beck, J.T. Overpeck, N. McKay, J.E. Pigati, J.A. Peck, C. Scholz, J. King. 2012. Late Quaternary sedimentological and climate changes at Lake Bosumtwi Ghana: new constraints from laminae analysis and radiocarbon age modeling: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 361, pp. 49-60.

2009

Shanahan, T.M., Overpeck, J.T., Anchukaitis, K.J., Beck, J.W., Cole, J.E., Dettman, D.L., Peck, J.A., Scholz, C.A., and King, J.W., 2009, Atlantic Forcing of Persistent Drought in West Africa: Science, v. 324, p. 377-380.

Schouten, S., Hopmans, E.C., van der Meer, J., Mets, A., Bard, E., Bianchi, T.S., Diefendorf, A., Escala, M., Freeman, K.H., Furukawa, Y., Huguet, C., Ingalls, A., Menot-Combes, G., Nederbragt, A.J., Oba, M., Pearson, A., Pearson, E.J., Rosell-Mele, A., Schaeffer, P., Shah, S.R., Shanahan, T.M., Smith, R.W., Smittenberg, R., Talbot, H.M., Uchida, M., Van Mooy, B.A.S., Yamamoto, M., Zhang, Z.H., and Damste, J.S.S., 2009, An interlaboratory study of TEX86 and BIT analysis using high-performance liquid chromatography-mass spectrometry: Geochemistry Geophysics Geosystems, v. 10.

Pigati, J.S., Bright, J.E., Shanahan, T.M., and Mahan, S.A., 2009, Late Pleistocene paleohydrology near the boundary of the Sonoran and Chihuahuan Deserts, southeastern Arizona, USA: Quaternary Science Reviews, v. 28, p. 286-300.

2008

Shanahan, T.M., Overpeck, J.T., Sholz, C.A., Beck, J.W., Peck, J., and King, J.W., 2008, Abrupt changes in the water balance of tropical West Africa during the late Quaternary Journal of Geophysical Research-Atmospheres, v. 113, p. D12107.

Shanahan, T.M., Overpeck, J.T., Hubeny, J.B., King, J., Hu, F.S., Hughen, K., Miller, G., and Black, J., 2008, Scanning micro-X-ray fluorescence elemental mapping: A new tool for the study of laminated sediment records: Geochemistry Geophysics Geosystems, v. 9.

Conroy, J.L., Overpeck, J.T., Cole, J.E., Shanahan, T.M., and Steinitz-Kannan, M., 2008, Holocene changes in eastern tropical Pacific climate inferred from a Galapagos lake sediment record: Quaternary Science Reviews, v. 27, p. 1166-1180.

Shanahan, T. M., Overpeck, J. T., J.W.Beck, Wheeler, C. W., Peck, J. A., King, J. W., and Scholz, C. A., 2008. The formation of biogeochemical laminations in LakeBosumtwi, Ghana, and their usefulness as indicators of past environmental changes. Journal of Paleolimnology

2007

Shanahan T. M., Overpeck J. T., Sholz C., Sharpe E., and Arko J., 2007 Simulating the response of a closed basin lake to recent climate and land-use changes in tropical West Africa (Lake Bosumtwi, Ghana). Hydrological Processes 21 (13) 1678-1691

Scholz, C.A., T.C. Johnson, A.S. Cohen, J.W. King, J.P., J.T. Overpeck, M.R. Talbot, E.T. Brown, L .Kalindekafe, P.Y.O. Amoako, R.P. Lyons, T.M. Shanahan, I.S. Castaneda, C.W. Heil, S.L. Forman, L.R. McHargue, K.R. Beuning, J.Gomez, and J. Pierson, East African megadroughts between 135 and 75 kyr ago and implications for early human history. Proceedings of the National Academy of Sciences, 10.1073/pnas.0703874104.

2006

Shanahan T. M., Overpeck J. T., Beck J. W., Pigati J., Wheeler C. W., Talbot M. R., Scholz C. A., Peck J., and King J. W., (2006), Paleoclimatic variations in West Africa from a record of late Pleistocene and Holocene lake level stands of Lake Bosumtwi, Ghana. Palaeoceanography, Palaeoclimatology, Palaeoecology 242 (3-4), 287-302.

2005

Shanahan, T. M., Pigati, J. S., Dettman, D. L., and Quade, J. (2005), Isotopic variability in the aragonite shells of freshwater gastropods living in springs with nearly constant temperature and isotopic composition. Geochimica Et Cosmochimica Acta 69(16), 3949-3966.

2004

Pigati, J.S., Quade, J., Shanahan, T.M., and Haynes, C.V., 2004, Radiocarbon dating of minute gastropods and new constraints on the timing of late Quaternary spring-discharge deposits in southern Arizona, USA: Palaeogeography Palaeoclimatology Palaeoecology, v. 204, p. 33-45.

Peck J. A., Green R. R., Shanahan T., King J. W., Overpeck J. T., and Scholz C. A. 2004 A magnetic mineral record of Late Quaternary tropical climate variability from Lake Bosumtwi, Ghana. Palaeogeography Palaeoclimatology Palaeoecology 215(1-2), 37-57.

2000

Shanahan, T. M., and M. Zreda, 2000 Chronology of Quaternary glaciations in East Africa: Earth and Planetary Science Letters, v. 177, p. 23-42.

1997

Giletti, B.J., and Shanahan, T.M. 1997 Alkali diffusion in plagioclase feldspar: Chemical Geology, v. 139; 1-4, p. 3-20.