Timothy M Shanahan
Tim Shanahan (he/his) is an Associate Professor in the Department of Geological Sciences and the Director of the Environmental Science Program (Undergraduate Major). His research is focused on understanding climate change and climate variability and the impacts of climate changes on landscapes, ecosystems and hydrogeology. He uses a variety of geochemical tools (stable isotopes, organics, sediments) to reconstruct past climate changes on a range of timescales, and uses paleoclimate data and climate model simulations to understand the causes of past climate changes. His teaching interests include climate change and water resource availability, sustainability and environmental science. He is also the primary instructor for GEO303 - Introduction to Geology.
You can learn more about the Shanahan research group here:
Click here for the Shanahan Research Group Website
Areas of Expertise
climate variability, climate change, paleoclimatology, geochemistry, stable isotopes, organic geochemistry, sedimentology, environmental science If you are interested in learning more, please visit research website.
Knebel Distinguished Teaching award - Department of Geological Sciences (2020)
Kavli Fellow - National Academy of Sciences (2012)
NOAA Climate & Global Change Postdoctoral Fellowship - NOAA (2006)
Woods Hole Oceanographic Institution Postdoctoral Fellowship - Woods Hole Oceanographic Institution (2006)
NSF-IGERT research traineeship in Anthropology (2003)
McGinnies Fellowship for Arid Lands Studies, U. Arizona (2002)
NSF research traineeship in hydrology (1997)
Outstanding Graduating Senior, Dept. of Geosciences, Brown U. (1994)
National Association Of Geology Teachers Undergraduate Award (1994)
Sigma Xi (1994)
Director, EVS (Environmental Science) Academic Program, (2022)
Graduate Assembly Admissions & Enrollment committee, (2022)
Graduate Assembly member, (2022)
Shannon Loomis, 2013 - 2015
Development of a new calibration for the MBT5ME' paleotemperature index using branched GDGTs in African Lake sediments.
Michael Toomey, 2013 - 2015
Pacific Atoll carbonate sedimentology.
Erin M Keenan Early
My research explores the use of geomolecular and biomolecular methodologies to address paleoenvironmental and paleoecological questions. Specifically I am researching the use of proteomics as applied to faunal material as a means of species identification and I am exploring the applications of brGDGTs recovered from various sources to aid in paleotemperature reconstruction. My work is largely restricted to the Quaternary,...
Victoria L Todd (Supervisor)
Sophia Bautista (Supervisor)
Natasha Piatrunia, Ph.D., 2022
Variations in the Southern Hemisphere westerlies and paleotemperature variations in the southern mid-latitudes from the hydrogen isotope composition of sedimentary leaf waxes and the MBT5ME' paleotemperature index in Lake Pupuke, New Zealand.
Chijun Sun, Ph.D., 2021
Controls on the development of storms in the southern Great Plains using hydrogen isotope composition of leaf waxes preserved in Hall's Cave, Texas combined with climate model simulations.
Veronica Anderson, Ph.D., 2015
Late Miocene uplift of the eastern cordillera of Colombia using branched GDGT inferred paleotemperatures.
Andrea Miller-Hannah, Ph.D., 2015
Stratigraphic and geochemical signatures of past climate change and sedimentology of the Colville Delta, Alaska over the last two millennia.
Travis Wicks, M.S., 2013
The use of stable isotope variations in leoporid teeth to reconstruct past climate variations in sedimentary deposits.
Vera Stoynova, M.S., 2012
Development of the IP25 sea ice proxy using surface sediments from the Bering Sea. The IP25 index is based on the abundance of a particular alkene produced by diatoms living in sea ice. Abundances of this biomarker in marine sediments can provide a quantitative proxy for the duration of sea ice extent in the surface ocean over a...
Curtis Bixler, M.S., 2012
Paleoclimate reconstructions from scanning XRF elemental analysis and branched GDGTs in sediment cores spanning the last two millennia from Lake Chingaza. Colombia.
Megadroughts in the tropics: insights from the geological record, National Academy of Sciences Kavli Symposium: Indonesia, Solo, Indonesia (2012)
New constraints on the use of IP25 as a paleo-sea ice proxy, First workshop of the PAGES Sea Ice Proxy (SIP) working group on the basis of sea ice proxies, Montreal (2012)
Megadroughts, abrupt climate changes and ecosystem feedbacks in the West African monsoon, Lamont-Doherty Earth Observatory, New York (2011)
Ecosystem feedbacks and changes in the West African monsoon, University of Rochester, Rochester, NY (2011)
Abrupt climate change and ecosystem feedbacks in the West African monsoon, Syracuse University, Syracuse, NY (2011)
Abrupt climate change and ecosystem feedbacks in the West African monsoon, Texas Marine Science Institute, Port Aransas, TX (2011)
Megadroughts, abrupt climate changes and ecosystem feedbacks in the West African monsoon, The Open University, Milton Keynes, UK (2011)
ICDP Drilling at Lake Bosumtwi: Progress and challenges, Workshop on drilling of East African Lakes, Brown University, RI (2011)
Late Holocene megadroughts and temperature changes in the tropics: coherent century-scale climate variability across the tropics, American Geophysical Union annual meeting, San Francisco, CA (2011)
Lakes as archives of environmental change in Southeast Asia, Greater Mekong Delta meeting, Cambodia (2010)
Two millennia of climate change in tropical West Africa: a review., First workshop of the PAGES Africa 2k working group, Ghent, Belgium (2010)
|2022||Fall||GEO 303||Introduction To Geology|
|2022||Summer||GEO f382C||Groundwater Field Methods|
|2022||Summer||GEO f376L||Field Meths In Groundwtr Hydrl|
|2021||Fall||GEO 303||Introduction To Geology|
|2021||Spring||GEO 303||Introduction To Geology|
|2021||Spring||GEO 303||Introduction To Geology-Wb|
|2020||Fall||GEO 303||Introduction To Geology-Wb|
|2020||Fall||GEO 303||Introduction To Geology|
|2019||Fall||GEO 303||Introduction To Geology|
|2019||Spring||GEO 303||Introduction To Geology|
|2018||Fall||GEO 303||Introduction To Geology|
|2018||Spring||GEO 394||Rsch In Geological Sciences|
|2018||Spring||GEO 291||Paleoclimate Seminar|
|2018||Spring||GEO 303||Introduction To Geology|
|2017||Fall||GEO 394||Rsch In Geological Sciences|
|2017||Fall||GEO 291||Paleoclimate Seminar|
|2017||Fall||GEO 303||Introduction To Geology|
|2017||Spring||GEO 394||Rsch In Geological Sciences|
|2017||Spring||GEO 291||Paleoclimate Seminar|
|2017||Spring||GEO 303||Introduction To Geology|
|2016||Fall||GEO 303||Introduction To Geology|
|2016||Fall||GEO 191||Paleoclimate Topics Seminar|
|2016||Fall||GEO 394||Rsch In Geological Sciences|
|2016||Spring||GEO 291||Current Topics Paleoclimate|
|2016||Spring||GEO 303||Introduction To Geology|
|2015||Fall||GEO 303||Introduction To Geology|
|2015||Spring||GEO 302C||Climate: Past, Present, Future|
|2014||Fall||GEO 394||Rsch In Environmental Change|
|2014||Fall||GEO 303||Introduction To Geology|
|2014||Spring||GEO 302C||Climate: Past, Present, Future|
Stable isotopes as hydroclimatic indicators
I am looking for an undergraduate student researcher to work on the analysis of stable isotopes in natural waters and plant materials. No experience necessary. The student researcher will be trained in extracting water samples on a vacuum system and analysis of stable isotopes using a laser spectrometer. Depending on progress, there may be opportunities to publish this research
Paleoclimate reconstructions in the southern Rocky Mountains
I am looking for one or more undergraduate student researchers to work on paleoclimate reconstructions in the southern Rockies using geochemical indicators in lake sediments. No experience necessary. Depending on progress, there will be opportunities to publish.