Sea levels are rising globally due to anthropogenic climate
change. However, local sea levels that impact the coast are often
different from the global trend, sometimes by twice as much. An improved
understanding of this regional variability has implications for coastal
communities planning for the future and provides insight into
geophysical and oceanographic processes. In this talk, we will take a
look at coastal sea level with new observations and cutting-edge
techniques and learn what it can teach us about ocean dynamics. After a
brief introduction to sea level, we will take a look at recent trends
and variance in the coastal ocean as seen by ICESat-2. While primarily
focused on the poles, ICESat-2 also provides measurements of sea level,
which compare well with conventional methods but at a much higher
spatial resolution. They reveal a remarkable spatial structure that's
ripe for further research. Next, we will dry out for a moment to better
understand the role of vertical land motion (VLM) in sea-level
rise. Large parts of the East Coast are sinking, but as with sea level,
rates are variable and challenging to observe at high spatial
resolution. However, continuous advancements in InSAR (Interferometric
Synthetic Aperture Radar) techniques are enabling us to observe coastal
cities with increasingly fine resolution. We will walk through some of
the details of InSAR processing and then I will present rates of VLM at
30 m resolution in several coastal cities and highlight some interesting
features. I will then talk about the new OPERA project underway at the
Jet Propulsion Laboratory (JPL) and its implications for VLM. Finally,
we will head back to the ocean and zoom out to look at the East Coast as
a whole. I will describe how our Bayesian framework combines
observations and uncertainties to constrain drivers of sea-level change
along the coast. I will detail the role of the dynamic component of
sea-level change and discuss potential implications for its role in
Atlantic Ocean circulation and the climate system as a whole.
Dr. Buzzanga is an Earth Scientist focused on the coast and is currently a postdoctoral fellow at NASA JPL with a dual position in the Sea Level and Ice and Radar Science groups. With the sea level group, he uses satellite observations of the ocean to understand how climate and geophysical processes vary in space and time. With the Radar science group, he works with the remote sensing technique of InSAR to measure vertical land motion, which impacts sea-level rise and flooding in coastal communities worldwide. More generally, Dr. Buzzanga is interested in the interface between science and society, and how a systemic understanding of Earth can enable a healthy relationship between people and the planet. He received Ph.D. (2021) and M.S. degrees from Old Dominion University in Virginia after earning a B.A. at Rutgers University. He enjoys being around water and music.
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