Research | Overview
 
RESEACRH @ ASI LAB
The Atmosphere and the Ocean are a coupled system. They constantly exchange heat, mass, momentum and energy. Since the air-sea interface comprises approximately 70% of the earth surface, it is clear that the study of these air-sea fluxes and the physics that governs them is crucial to many global and sometimes pressing problems.

The exchanges of momentum, heat, and mass (gas, spray, and bubbles) between the atmosphere and the ocean must necessarily transfer through the surface layers and the rates at which they do may be greatly influenced by the dynamics involved. And while attention has, in the past, focused on larger-scale longer-term phenomena, the mechanisms involved in small-scale mixing remain rather poorly understood. In fact, very little is known about their intermittent nature, which may very well dominate the long-term behavior of the upper layers of the ocean. For example, recent studies suggest that bubbles generated by breaking waves, might be responsible for a large fraction of the air-sea gas transfers.

At the Air-Sea Interaction Laboratory, we focus on the study of small-scale phenomena (breaking waves, sea-sprayrainturbulence…) and how they drive the multiple air-sea transfers. We use a combination of state-of-the-art experimental techniques in the large wind-wave-current facility, as well as field experiments and numerical studies. Please check-out our list of selected publications.

CURRENT RESEACRH TOPICS:
Sea Spray & Spray Fluxes
 
Project Overview:
We use a combination of numerical modeling and laboratory experiments to determine the sea-spray concentration in the air and the rate at which the drops evaporate and transfer energy to the airflow.
 
 
Role of Rain in Mixing and Gas Exchange
 
Project Overview:
Rain impacts on the ocean surface damping the surface waves and generating intense near-surface mixing. We study the influence of rainfall of the generation of turbulence and the subsequent gas flux between the atmosphere and the ocean.
 
 
Surface Turbulence & Coherent Structures
 
Project Overview:
We examine the small scale turbulence at the surface of the ocean and how it influences it is coupled with the wave and influences the air-sea exchanges of heat.
 
 
 
Project Overview:
Airflow separation is thought to be one of the factor contributing to very high wind speeds in hurricanes. We observe and measure separation above surface gravity waves in the lab and the field and directly measure the surface stress.
 
 
 
Project Overview:
In this field experiments, we deployed a high resolution stereo imaging system in order to look at the surface elevation, slope, and distribution of small scale breaking waves.
 
 
 
Project Overview:
This project is a theoretical study of the influence of breaking waves and breaking entrained bubble plumes on the air-sea fluxes of atmospheric greenhouses gases.
 
 
 
Project Overview:
This computational fluid dynamic (CFD) project seeks to study the forces and stresses generated by the surface waves on complex structures supporting offshore wind power turbines.
 
 
 
Air-Sea Interaction Laboratory | Newark & Lewes, DE USA
Phone: 302-831-6658| Email: airsealab@udel.edu
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