Marine Sciences

Sarah Shackleton

Woods Hole Oceanographic Institution

Paleo perspectives on the global energy budget from air bubbles in ice

Ocean heat and carbon uptake are critical in modulating the climate response to modern greenhouse gas forcing and contribute both directly and indirectly to future sea level rise. While no perfect analog for future global warming exists in the paleo record, examining how ocean warming and cooling have influenced the global energy budget under various boundary conditions provides valuable insights into this key component of the climate system. Here we will assess the role of ocean heat uptake and release in shaping the global energy budget in the past from reconstructions of mean ocean temperature derived from ice core noble gas measurements.

Host: Dave Lund
Time & Date: 11:00 am, Friday, October 18, 2024
Place: Lowell Weicker Building, Seminar Room 103 (or WebEx)

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Cancellation & Additional Seminar Details

If you are an individual with a disability and need accommodations, please contact 860-405-9152 or email marinesciencesseminars@uconn.edu.

https://marinesciences.uconn.edu/seminar/brownbag1248/

Please email Katie for the link to join online.

Xingchen Tony Wang

Boston College

Ocean fertilization, carbon sequestration, and deoxygenation: From Miocene to Anthropocene

Ocean fertilization, which aims to enhance primary productivity by introducing limiting nutrients (such as iron, nitrogen, or phosphorus) into nutrient-poor surface waters, is currently being explored as a technology for ocean-based carbon dioxide removal. However, the efficacy of this approach in sequestering carbon in the deep ocean remains uncertain. In addition, the increased export of organic matter to subsurface waters could exacerbate deoxygenation, potentially expanding ‘dead zones’ where fish and animals cannot survive. In this presentation, I will discuss several historical case studies that may shed light on these issues, including: (1) ocean phosphorus fertilization and the origins of the largest ‘dead zones’ in the eastern Pacific Ocean eight million years ago; (2) ocean iron fertilization during the Pleistocene ice ages and its impact on atmospheric carbon dioxide; and (3) anthropogenic nitrogen fertilization and its effects on ‘dead zones’ in the northern Gulf of Mexico.

Host: Julie Granger
Time & Date: 11:00 am, Friday, October 25, 2024
Place: Lowell Weicker Building, Seminar Room 103 (or WebEx)

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Cancellation & Additional Seminar Details

If you are an individual with a disability and need accommodations, please contact 860-405-9152 or email marinesciencesseminars@uconn.edu.

This is an Honors Event. See tags below for categories. #UHLevent10967

https://marinesciences.uconn.edu/seminar/brownbag1248/

Please email Katie for the link to join online.