Seminars

Talk Abstract:

Near-Inertial Internal Waves (NIWs) play a key role in the ocean circulation energy balance but their dynamics is challenging.  Because NIW dynamics requires synoptic sampling at very high vertical resolution this is only a partially resolved topic in oceanography. Here, I present results from a multi-platform, multi-scale and multi-disciplinary campaign led by the NATO Centre for Maritime Research and Experimentation in the Ligurian Sea (Northwestern Mediterranean Sea) from September to November 2017. The…

Please join us on zoom or in person for this week's hybrid Polar Hour with Dr. Karley Campbell (UiT The Arctic University of Norway).

Inhale. Exhale. Studying sea ice as a living & breathing system

Abstract: Global warming is transforming Arctic sea ice, impacting the communities of specialised microorganisms like algae and bacteria that live within it. Sea ice microorganisms are vital members of the marine ecosystem. They generate and recycle organic carbon, and influence the…

Talk Abstact:

Tropical cyclone (TC) intensity is strongly affected by the air-sea heat flux beneath the storm. Therefore, accurate predictions of upper ocean responses (such as mixed layer deepening, upwelling, and sea surface temperature cooling) under TCs are necessary for improving TC intensity forecast. The accurate wind stress which driven upper ocean current needs to be understood more. In this study the wind stress (or the drag coefficient) into the ocean and the sea state dependence of drag coefficient (Cd) under tropical cyclones is investigated. The…

Please join us on zoom or in person for this week's hybrid Polar Hour with Dr. Jacob Buffo (Dartmouth College).
 

Talk Title: It’s a Hard Knock Life (In Ice): The Challenges Faced by Ice Dwelling Organisms and Implications for Astrobiology

Abstract: There are abundant and thriving ecosystems in many ice-rich environments on Earth (e.g., sea ice, permafrost, glaciers). Moreover, many high priority astrobiology targets (e.g., Europa, Enceladus, Titan, Mars) are likely characterized by ice-ocean or ice-brine systems…

Note: This is a joint seminar hosted with Caltech and UCLA

Talk abstract:

Mesoscale eddies contain the bulk of the ocean’s kinetic energy (KE), but fundamental questions remain on the cross-scale KE transfers linking eddy generation and dissipation. The role of submesoscale flows represents a key point of discussion, with contrasting views of submesoscales as either a source or a sink of mesoscale KE. Here, the first observational assessment of the annual cycle of the KE transfer between mesoscale and…

Talk abstract:

Global atmospheric `storm-resolving' models with horizontal grid spacing of less than ~5km resolve deep cumulus convection and flow in complex terrain. While computationally expensive, they can be run for yearlong scales and can serve as reference models for improving more economical coarse-grid global weather and climate models. Machine learning (ML) offers an avenue for translating the patterns seen in storm-resolving models onto the coarser grid, with the ultimate goal of reducing uncertainties in regional precipitation and temperature trends in global…

Talk Abstract: TBA

Talk Abstract:

While much attention has been given to understanding how anthropogenic greenhouse gas emissions influence the mean state of the climate system, far less scrutiny has been paid to how they may modulate naturally occurring modes of climate variability.  In this talk, I will present a new analysis of projected changes in the patterns and amplitudes of atmospheric circulation variability over the North Pacific and North America based on a novel set of global climate model simulations. As climate change…

Please join us on Zoom for the Marine Biology seminar where Dr. Anita Giraldo Ospina (University of Western Australia/UCSB) will present: