| Date | Time | Location |
|---|---|---|
| April 7th, 2026 | 3:05pm-4:05pm | Clark 507 |
Abstract: The Gulf Stream is one of the strongest western boundary currents in the world ocean carrying significant heat affecting weather, ecosystems, marine transport and climate. It has been monitored by satellite and in-situ observational platforms for decades. Continuous synoptic observational analysis (2-3 times a week) for over45 years (1980-2024) for the Stream and its eddies have been made available to us, which resulted in multiple recent studies on its variability and yielded new insights. First, the annual formation rate of the warm core rings almost doubled from eighteen to thirty-three with a regime shift around 2000(Gangopadhyay et al., 2019, 2020). Second, two new types of eddies other than the well-known pinch-off rings are discovered. To the north of the Stream, the smaller and shallower aneurysm-type anticyclones are mostly abundant to the west of the New England Seamount Chain (Silver et al., 2022). Similarly, to the south of the Stream, hook-type cyclones are discovered which appear to form all along the Stream (Jensen et al., 2025). Their implications for renewed understanding of the overall circulation of the North Atlantic, ecosystems, fisheries, data assimilation and real-time forecasting are highlighted.
References:
Gangopadhyay etal, 2019, Sci. Rep.
Gangopadhyay etal. 2020, JGR-Oceans.
Silver et al.,2022, JGR-Oceans.
Jensen et al.,2025, Sci. Rep.