People

Prof. Andrew Jacobson

Prof. Andrew Jacobson

Primary Investigator

Current Group Members

Dr. Meagan Ankney

Dr. Meagan Ankney

Research Associate and TIMS Lab Manager

Dr. Ben Linzmeier

Dr. Ben Linzmeier

Post Doctoral Scholar

Ben is working to identify ancient analogues for modern ocean acidification that can be identified using geochemistry. He is also interested in understanding how environmental processes at various time and spatial scales are integrated in the rock record.

Gabriella Kitch

Gabriella Kitch

Ph.D. Student

2017 NSF Graduate Research Fellow.

My research focuses on understanding ocean carbonate chemistry changes during ocean acidification events and using geochemical tools (Ca and B isotope systems) to constrain these events in deep time. More specifically, I analyze foraminifera over time periods of abrupt carbon cycle perturbations, such as the Paleocene-Eocene Thermal Maximum (PETM) to generate species specific geochemical records.

Annie Nelson

Annie Nelson

Ph.D. Student

Ca is a key component of the long term carbon cycle, and the weathering of Ca-bearing silicate minerals regulates global climate over geologic time. I use Ca and Sr isotope geochemistry to investigate chemical weathering of basalt in Iceland . My field-based study aims to characterize Ca and Sr isotope ratios of different materials in Iceland and identify processes that affect Ca- and Sr- cycling in rivers, in order to better understand the role basalt chemical weathering plays in regulating climate.

Jiuyuan Wang

Jiuyuan Wang

Ph.D. Student

Niloufar Sarvian

Niloufar Sarvian

Ph.D. Student

2018 – 2019 ISEN Cluster Fellow

My research examines the causative mechanisms behind the Neoproterozoic Snowball Earth. I use radiogenic and stable strontium isotopes to investigate the levers of the carbon cycle and the factors that contributed to a worldwide glaciation event.

Karyn DeFranco

Karyn DeFranco

Ph.D. Student

My research focuses on C, Sr, and Ca isotope geochemistry and hydrogeology of groundwater and submarine groundwater discharge in modern carbonate platforms. I’m currently working in the Yucatan Peninsula, Mexico sampling the groundwater in different parts of its path, how it changes, and what’s being discharged into the ocean.

Former Group Members

Dr. Grace Andrews

Ph.D. Student
2012-2017

Dr. Alain Potrel

TIMS Lab Manager
2012-2017

Dr. Greg Lehn

Ph.D. Student, Post Doctoral Scholar, and TIMS Lab Manager
2009-2017

Dr. Jong-Sik Ryu

Post Doctoral Scholar
2009-2011

Dr. Joel Moore

Post Doctoral Scholar
2008-2011

Dr. Lingling Wu

Ph.D. Student
2007

Harry Hahn

Undergraduate
2013

Joey Gill

Undergraduate
2012

Jessica Kunke

Undergraduate
2010

Alan Wong

Undergraduate
2010

Eric Kramer

Undergraduate
2009