Speaking Buzzanga

2023

Vertial land motion rates. Blue colors indicate subsidence (sinking), red colors uplift. Rates are estimated from Sentinel-1–derived interferograms spanning May 2016 to March 2023. Colored square markers indicate GNSS stations used in referencing InSAR velocities to ITRF14, while circles mark stations used in validation.

Buzzanga, B., Bekaert, D., Hamlington, B., Kopp, R., Govorcin, M., Miller, K (2023). Localized uplift, widespread subsidence, and implications for sea level rise in the New York City metropolitan area. Science Advances. https://doi.org/10.1126/sciadv.adi8259

In the News!

Localized uplift, broad subsidence and implications for sea level in greater NYC.

2022

Projections of future sea-level rise are typically produced using numerical computer models. Instead, we used just observations - from both satellites and ground measurements - to project future sea-level rise along the US Coastlines. We find that our method agrees with high end numerical future model estimates.

Hamlington, B., Chambers, D. P., Frederikse, T., Dangendorf, S., Fournier, S., Buzzanga, B., Nerem., R.S. (2022). Observation-based trajectory of future sea level for the coastal United States tracks near high-end model projections. Nature Communications Earth & Environment. https://doi.org/10.1038/s43247-022-00537-z

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Observation-based trajectory of future sea level for the coastal United States tracks near high-end model projections. News!

2021

Conventional radar satellites have difficulty measuring sea level close to the coast because of the size of their ground footprints. Here we explored measurements from a laser satellite, ICESat-2, which has a smaller footprint. The measurements from ICESat-2 are of good quality and well complement the measurements from radar.

Buzzanga, B., Heijkoop, E., Hamlington, B., Nerem, R., and Gardner, A. S. (2021). An assessment of regional ICESat-2 sea-level trends. Geophysical Research Letters. https://doi.org/10.1029/2020GL092327

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An assessment of regional ICESat-2 sea-level trends. News!

My doctoral dissertation was focused on understanding coastal sea-level rise using satellites. The three chapters were published separately and can be found on the underlying page.

Buzzanga, B. (2021). Towards an integrated assessment of sea-level observations along the U.S. Atlantic coast. PhD Thesis. https://digitalcommons.odu.edu/oeas_etds/181/

Towards an integrated assessment of sea-level observations along the U.S. Atlantic coast.

2020

Similar to our study in 2017, we used a satellite technique called InSAR to measure how fast land was moving in Hampton Roads, VA. This time, we used InSAR data from a different satellite processed with an automated system. We again see that much of the region is subsiding, but that some hotspots have reversed due to changes in human activity.

Buzzanga, B., Bekaert, D. P. S., Hamlington, B. D., and Sangha, S. S. (2020). Towards sustained monitoring of subsidence at the coast using InSAR and GPS: An application in Hampton Roads, Virginia. Geophysical Research Letters. https://doi.org/10.1029/2020GL090013

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Towards sustained monitoring of subsidence at the coast using InSAR and GPS: An application in Hampton Roads, Virginia. News!

2017

We used a satellite technique called InSAR to measure how fast land movement in Hampton Roads, VA. We found that most of it was subsiding (moving down), with particular hotspots of subsidence that could make flooding from sea-level rise worse.

Bekaert, D. P. S., Hamlington, B.D., Buzzanga, B., Jones, C.E. (2017). Spaceborne synthetic aperture radar survey of subsidence in Hampton Roads, Virginia (USA) Scientific Reports. https://doi.org/10.1038/s41598-017-15309-5

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Spaceborne synthetic aperture radar survey of subsidence in Hampton Roads, Virginia (USA) News!

As sea-level rises, connected groundwater levels can also rise. When groundwater is elevated, precipitation has less room to infiltrate and can lead to more flooding. I coupled a groundwater model (MODFLFOW) and surface water model (SWMM) to quantify and map groundwater levels for different amounts of sea-level rise.

Buzzanga, B. (2017). Precipitation and sea-level rise impacts on groundwater levels in Virgina Beach, Virginia. Master's Thesis. https://digitalcommons.odu.edu/oeas_etds/10/

Precipitation and sea-level rise impacts on groundwater levels in Virgina Beach, Virginia.

Brett Buzzanga

Brett Buzzanga

BB

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