ESSO - Indian National Centre for Ocean Information Services

ABOUT THE TALK:

Over the last 50 years, many new tools have been developed to measure the ocean and its role in the overall climate system including satellite remote sensing and robotic platforms of many types. Numerical models now assimilate some of this data to provide a real time unified view of the ocean. How do we best use these new tools to improve our understanding of the ocean and thus our predictions of both local oceanography and climate? The talk will provide an overview of the tools, with an emphasis on some the new robotic tools and describe a recent oceanographic campaign designed to use them to improve models.

ABOUT THE TALK:

Dr. Eric D'Asaro, APL Professor WOT, School of Oceanography, University of Washington.

Dr. D'Asaro's research spans a wide number of environments from upper ocean mixed layers to nearshore coastal fronts to fjords to deep convection. It retains studies of turbulence and internal waves, but has increasingly moved toward understanding the role of these ocean mixing processes in controlling biochemical processes in the ocean, especially gas exchange and biological productivity. By measuring big signals, like hurricanes or major blooms, it is easier to unravel the underlying processes because the signal to noise is high.

For the past 20 years, D'Asaro has focused on exploiting the unique capabilities of "Lagrangian Floats", a class of instruments that try to accurately follow the three dimensional motion of water parcels particularly in regions of strong mixing. This turns out to be a novel but effective way to measure turbulence in regions of strong mixing.

Lagrangian techniques have not been used very much in measuring mixing and turbulence. Accordingly one of the more exciting aspects of this work is learning how to use Lagrangian floats in the ocean. This understanding draws both upon basic ideas in fluid mechanics and upon understanding of mixing in the ocean. It strongly influences float design, use, and the oceanographic problems studied. The work thus spans a wide range of topics, from fluid mechanics to oceanography to engineering. That makes it particularly fun and interesting.

Chemical species in the ocean and many microbial plants and animals drift with the ocean currents. Floats mimic this behavior, making them excellent platforms for studying aspects of ocean chemistry and biology. There is an ongoing revolution in these fields as electronic sensors become capable of making measurements formerly possibly only in the laboratory. Floats equipped with such sensors are potentially very powerful tools. Dr. D'Asaro works to realize this potential, which is especially challenging and interesting as he collaborates with ocean biologists and chemists to design and operate multidisciplinary floats.

Registration Process:

By invitation only.

Date & Time of the Seminar: 12^th December, 2022 from 11:30 AM to 12:30 PM IST (GMT+5:30 Hrs).

Venue

Indian National Centre for Ocean Information Services (INCOIS)
Ministry of Earth Sciences, Government of India,
"Ocean Valley", Pragathi Nagar (B.O), Nizampet (S.O)
Hyderabad - 500 090, INDIA

Organizer

International Training Centre for Operational Oceanography (ITCOocean)
Indian National Centre for Ocean Information Services (INCOIS)
(Ministry of Earth Sciences, Government of India)
"Ocean Valley", Pragathi Nagar (B.O.)
Nizampet (S.O.), HYDERABAD - 500 090
TELANGANA
INDIA
Tel : +91 40 23895000
Fax : +91 40 23895001
Email: itcoocean@incois.gov.in; itcoocean@gmail.com
Additional informations/queries can be directed to:TVS Udaya Bhaskar (uday@incois.gov.in)

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