Dr. Shaun Marcott ( is an Associate Professor in the Department of Geoscience at University of Wisconsin-Madison whose work is focused in the broad fields of paleoclimatology, glacial geology, geochemistry, and geochronology. His professional interests span a broad range of geological and climatological questions that typically encompass the last 150,000 years. He is an Earth Scientist, which is reflected in his broad research interests and education in geology, oceanography, and mathematics. He and his research group focus their efforts on developing new approaches to long standing problems in geochronology and paleoclimatology, and spend a considerable amount of time split between the WiscCosmo Lab and conducting geologic field work.

Andrew Jones is a PhD student in the Department of Geoscience studying paleoclimate. Andrew received a B.S. in Geoscience from Boston College in 2015, where he completed a senior thesis under the advisory of Jeremy Shakun. His thesis tested the freshwater routing hypothesis for abrupt climate change by applying isotope geochemistry to foraminifera to construct a paleodischarge record for the Hudson River. Presently, Andrew works in the WiscCosmo Lab on extracting Be-10 from quartz in order to study current alpine glacier extents across the spine of the American Cordilleras in comparison to their variations throughout the Holocene (the last 11,700 years).

Jeremy Brooks is a PhD student in the Department of Geoscience studying glacial processes. Jeremy received a B.A. in Earth and Planetary Science from Northwestern University in 2020, where he completed a senior thesis reconstructing the Little Ice Age paleo-extent of alpine glaciers in South Greenland and inferring climatic change based on paleo-glacier equilibrium lines. Jeremy’s research at Wisconsin involves studying the physical processes of glacial erosion, using cosmogenic nuclides to infer deglacial chronology and erosion rates in Wisconsin, and studying chemical weathering under glaciers in laboratory-controlled and field settings.

Matias Romero is a PhD student in the Department of Geoscience studying past glacier change. Matias received a degree in Geology from Universidad Nacional de Cordoba (UNC), Argentina, in 2019, where he carried out a senior thesis unraveling past atmospheric circulation in the southern hemisphere by using clay minerals recovered from loess deposits. Before starting as a PhD student at the University of Wisconsin-Madison, Matias worked on reconstructing past ice extent and sea level response in James Ross Island, as well as in the South Shetland Islands, Antarctica. Currently, Matias is working on understanding the fluctuations of the Patagonian Ice Sheet during the last glacial to interglacial transition by employing cosmogenic nuclide surface exposure dating. When not in the field or at the lab, Matias can be found biking, reading, or simply procrastibaking.

Yasmeen Orellana Salazar is a MS student in the Department of Geoscience at University of Wisconsin-Madison studying glacial geology and paleoclimatology. Yasmeen received a B.S. in Geology from University of Temuco (Chile) in 2019, where she conducted a senior thesis on understanding and constraining changes in ice extent and sea level at Cape Melville, Antarctica. Yasmeen’s MS research involves studying the glacial record of the Patagonian Ice Sheet from moraines located on the flanks of the Villarrica volcano (Chile) using cosmogenic nuclides to constraint the glacial chronology in the Southern Volcanic Zone of Central Chile.

Former Lab Members

Shan Ye (PhD 2022) A Quantitative Investigation of Large Geoscientific Datasets

Cameron Batchelor (PhD 2022) High-resolution climate reconstructions from mid-continental, North American speleothems

Jeremiah Marsicek (Postdoc 2016-2019)  Cyberinfrastructure Building and Holocene Climate Change

Elizabeth Ceperley (PhD 2019) Geochronologic constraints of the Greenland and Laurentide Ice Sheet

Harmony Liu (PhD 2019) Bridging the Model-data Gap in Paleoclimatology – Data Assimilation and Noise-Removal from Marine Proxies

Claire Vavrus (BS 2018) Holocene glacier retreat in the Beartooth Mountains of south-central Montana

Richard Becker (PhD 2018) Glacial and Structural Geology of the Sierra Nevada

Aaron Barth (Postdoc 2016-2018) Glacial History of the Adirondack Mountains

Melissa Reusche (MS 2017)  Holocene glacial history of the Petermann Glacier in Northwest Greenland Greenland.