Hren, Michael - University of Connecticut

个人简介

Turner Postdoctoral Fellow (University of Michigan) Bateman Postdoctoral Fellow (Yale University) Ph.D. Stanford University 2007 M.S. Dartmouth College 2001 B.A. Dartmouth College 1999

研究领域

Stable Isotope Biogeochemistry: Stable isotopic analysis of organic and inorganic materials. Present research projects include work on long-term changes in atmospheric CO2, isotopic tracing of organic molecular biomarkers, isotopic fractionation during biosynthesis of cell components and degradation in sediments, and identification and stable isotopic analysis of biomarkers in ancient sediments.

近期论文

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Hren, M.T., Chamberlain, C.P., Spormann, A., Vitousek, P. (In Prep for Chemical Geology) The role of microbial biofilms on the chemical weathering of apatite. Dirghangi, S., Pagani, M., Hren, M.T., Tipple, B.J. (In Review Organic Geochemistry)Distribution of glycerol dialkyl glycerol tetraethers in soils from two environmental transects in the U.S. Lechler, A.R., Niemi, N.A., Hren, M.T., Lohmann, K.C. (In Review Tectonics) Paleoelevation estimates for the northern and central proto-Basin and Range from carbonate clumped isotope thermometry. Chamberlain, C.P., Mix, H.T., M u l c h , A ., Hren, M.T., Kent-Corson, M.L., Davis, S.J., Horton, T.W., Graham, S.A. (2012) The Cenozoic Climatic and Topographic Evolution of the Western North American Cordillera, American Journal of Science, DOI 10.2475/04.2011.0 Hren, M.T., Collison, M., Grimes, S., Sheldon, M., Lohmann, K. (In Review PNAS) Δ47 reconstruction of climatic and hydrologic changes across the Eocene-Oligocene boundary. Hren, M.T. and Sheldon, N.D. (2012) Temporal variations in lake water temperature:Paleoenvironmental implications of lake carbonate δ18O and temperature records. Earth & Planetary Science Letters 338, 77-84. Yang, H., Liu, W.G., Leng, Q., Hren, M.T., Pagani, M. (2011) Variation in n-alkane δD values from terrestrial plants at high latitude: Implications for paleoclimate reconstruction. Organic Geochemistry 42, 283-288. Takeuchi, A., Hren, M.T., Smith, S.V., Chamberlain, C.P., Larson, P.B. (2010) Pedogeniccarbonate carbon isotopic constraints on paleoprecipitation: Evolution of desert in the Pacific Northwest, USA, in response to topographic development of the Cascade Range. Chemical Geology 277, 323-335. Hren, M.T., Pagani, M., Brandon, M. (2010) Biomarker reconstruction of the early Eocene paleotopography and paleoclimate of the northern Sierra Nevada. Geology 38, 7-10. Doi:10.1130/G30215.1 Hren, M.T., Tice, M., Chamberlain, C.P. (2009) Oxygen and hydrogen isotope evidence for a temperate climate 3.42 billion years ago. Nature 462, 205-208. doi:10.1038/nature08518 Hren, M.T., Bookhagen, B., Blisniuk, P.M., Booth, A.L., Chamberlain, C.P. (2009) δ18O and δD of Streamwater Across the Himalaya and Tibetan Plateau: Implications for Moisture Sources and Paleoelevation Reconstructions Earth Planet. Sci. Lett. doi:10.1016/j.epsl.2009.08.041 Horton, T.W., Blum, J.D., Xie, Z., Hren, M.T., Chamberlain, C.P. (2009) Stable isotope foodweb analysis and mercury biomagnification in polar bears (Ursus maritimus). Polar Research. doi:10.1111/j.1751-8369.2009.00114.x Hren, M.T., Hilley, G.E., Chamberlain, C.P. (2007) The relationship between tectonic uplift and chemical weathering rates in the Washington Cascades: Field measurements and model predictions. Am. J. Sci. 307, 1041-1063. Hren, M.T., Chamberlain, C.P., Hilley, G.E., Bookhagen, B. (2007) Major ion chemistry of the Yarlung Tsangpo-Brahmaputra River: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya. Geochim. Cosmochim. Acta. 71:2907-2935. Hren, M.T., Lowe, D.R., Tice, M.M., Byerly, G., Chamberlain, C.P. (2006) Stable isotope and Rare Earth Element evidence for recent ironstone pods within the Archean Barberton greenstone belt, South Africa. Geochim. Cosmochim. Acta 70:1457-1470. Sjostrom, D.J., Hren, M.T., Horton, T.W., Waldbauer, J.R., and Chamberlain, C.P. (2006) Stable isotopic evidence for a pre-late Miocene elevation gradient in the Great Plains - Rocky Mountain region. in Willett, S., Hovius, N., Fisher, D., and Brandon, M., eds. Tectonics, Climate, and Landscape Evolution, Geological Society of America Special Paper 398, p. 309-319. Sjostrom, D., Hren, M.T., Chamberlain, C.P. (2004) Oxygen isotope record of goethite from ferricrete deposits indicate regionally varying Holocene climate change in the Rocky Mountain region, USA. Quat. Res. 61:64-71. Booth, A.L., Zeitler, P.K., Kidd, W.S.F., Wooden, J., Liu, Y., Idleman, B., Hren, M., and Chamberlain, C.P., (2004) U-Pb zircon constraints on the tectonic evolution of Southeastern Tibet, Namche Barwa area. Am. J. Sci. 304:889-929. Horton T.W., Sjostrom D.J., Abruzzese M.J., Poage M.A., Waldbauer J.R., Wooden J.L., Hren, M., Chamberlain C.P. (2004) Spatial and temporal variation of Cenozoic surface elevation in the great basin and southern Sierra Nevada. Am. J. Sci. 304:862-888. Meibom A., Anderson, D.L., Sleep, N.H., Frei, R., Chamberlain, C.P., Hren, M.T., Wooden, J.L. (2003) Are high 3He/4He ratios in oceanic basalts an indicator of deep-mantle plume components? Earth Planet. Sci. Lett. 208:197-204.