Aradhna Tripati

Aradhna Tripati. Aradhna Tripati is a prominent American geochemist and paleoclimatologist renowned for her pioneering research using novel isotopic techniques to reconstruct past climates and understand the dynamics of the Earth's carbon cycle. Her work, which spans the Cenozoic era, has provided critical insights into the sensitivity of the climate system to greenhouse gas concentrations and the history of ice sheets and sea level. A professor at the University of California, Los Angeles in the Institute of the Environment and Sustainability and the Department of Earth, Planetary, and Space Sciences, Tripati is also a celebrated science communicator and advocate for diversity and justice in the geosciences.

Early life and education

Aradhna Tripati was born in Ottawa, Canada, and grew up in San Diego, California. She developed an early interest in science and the environment, which led her to pursue undergraduate studies at the University of California, San Diego, where she earned a Bachelor of Science degree. Tripati then moved to the California Institute of Technology (Caltech) for her doctoral work, completing her Ph.D. in geochemistry and becoming a founding member of the pioneering clumped isotope geochemistry laboratory under the guidance of renowned scientists like John M. Eiler. Her graduate research laid the groundwork for applying this powerful isotopic tool to ancient carbonates and climate questions.

Scientific career and research

Following her Ph.D., Tripati held prestigious postdoctoral and research fellow positions at Harvard University and the University of Cambridge, where she was a NERC fellow. She joined the faculty at University of California, Los Angeles (UCLA) in 2010. Tripati's research program is highly interdisciplinary, combining geochemistry, paleoceanography, and climate modeling. She has made seminal contributions to understanding the evolution of the Antarctic Ice Sheet, the history of the South Asian monsoon, and global climate transitions like the Eocene-Oligocene transition. A major focus of her lab is developing and applying the clumped isotope paleothermometer to materials ranging from foraminifera and soil carbonates to speleothems, providing more accurate reconstructions of past temperatures and hydrological conditions.

Awards and honors

Tripati's innovative research and leadership have been recognized with several major awards. In 2021, she was awarded a MacArthur Fellowship, often called the "genius grant," for her work in paleoclimatology and science advocacy. She received the James B. Macelwane Medal from the American Geophysical Union (AGU) in 2018, one of the highest honors for early-career scientists in Earth and space sciences. Other notable honors include the W. Storrs Cole Memorial Award from the Geological Society of America, a Packard Fellowship for Science and Engineering, and being named a Fellow of the American Geophysical Union.

Selected publications

Tripati has authored numerous influential papers in top-tier journals. Key publications include foundational clumped isotope methodology papers in Geochimica et Cosmochimica Acta and Science, and major paleoclimate studies in Nature and PNAS. Notable works investigate the coupling of atmospheric carbon dioxide and climate over the past 20 million years, evidence for glacial-interglacial changes in sea surface temperatures, and the application of clumped isotopes to terrestrial records from the Andes and the Tibetan Plateau.

Advocacy and public engagement

Beyond her laboratory, Aradhna Tripati is a powerful voice for equity and inclusion. She is the founder and director of the Center for Diverse Leadership in Science at UCLA, an initiative dedicated to training a more inclusive scientific workforce and advancing community-engaged research. She frequently speaks on issues of environmental justice, the importance of diversity in STEM fields, and the societal relevance of climate science. Tripati actively engages with policymakers, serves on advisory boards for organizations like the Union of Concerned Scientists, and works to make geoscience more accessible to historically marginalized communities.

Category:American geochemists Category:Paleoclimatologists Category:University of California, Los Angeles faculty Category:MacArthur Fellows