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Highlights» Publications» Research»
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Highlights:
Sanford Awarded Prestigious Chair
APL-UW proudly announces that Tom Sanford has received a Secretary of the
Navy/Chief of Naval Operations Chair of Oceanographic Sciences award for
2008.
The Chair program stems from the recognition by the SECNAV and CNO that
oceanography, from science and technology to operations, is a core Navy
competency. The $1.2M award provides four years of support for the Chair and
at least two graduate students. The award recognizes Sanford's reputation as
an international leader in the field, the broad support of his research
programs across many sponsoring agencies, and his successful collaborations
with scientists and engineers to develop instruments and collect field
observations. Sanford plans to use the resources offered by the Chair to
deepen his exploration of ocean responses to tropical storms and ocean
processes in remote strong flows, and to emphasize new or expanded
exploitation of sensors and systems based on ocean electric and magnetic
fields. MORE »
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As Chair, Sanford will participate in ONR departmental reviews, help to
identify promising new opportunities in oceanographic sciences, and
participate in the synthesis of recently completed ONR initiatives. His
service as an advisor to the Chief of Naval Research and Navy departments
will continue after the 4-year period, as the Chair is granted as a lifetime
award.
"This very prestigious award, presented by Admiral Roughhead (CNO) and
Donald Winter (SECNAV), is well deserved. Tom has led in understanding
e-field in the marine environment and in developing unique e-field tools for
measuring, monitoring, and sensing within the ocean, primarily to advance
knowledge of the complex and coupled processes within that environment." -
Jeff Simmen
Also named a Chair of Oceanographic Sciences this year is Professor Tommy
Dickey of the University of California, Santa Barbara. Sanford and Dickey
are the 11th and 12th chairs since the program's inception in 1984. They
join an esteemed group: Robert Holman, William Kuperman, Walter Munk, James
O'Brien, Carl Wunsch, Robert Ballard, John Orcutt, Arthur Baggeroer, Robert
Weller, and our own Mike Gregg.
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Read our recent publications:
Lien, R.-C., and T. B. Sanford (2008). Observations of turbulence mixing
and vorticity in a littoral surface boundary layer, J. Phys. Oceanogr.,
38, 648-669.
D'Asaro, E. A., and R.-C. Lien (2007). Measurement of scalar variance
dissipation from Lagrangian floats, J. Ocean Atmos. Tech., 24, 1066-1077
D'Asaro, Eric, R.-C. Lien, and F.S. Henyey (2007). High-frequency internal
waves on the Oregon continental shelf. J. Phys. Oceanogr., 37, 1956-1967.
Peters, H., C. Lee, M. Orlic and C.E. Dorman (2007). Turbulence in the
wintertime northern Adriatic Sea under strong atmospheric forcing.
Journal of Geophysical Research, 112, C03S09, doi: 10.1029/2006JC003644.
Alford, M.H. (2008). Observations of parametric subharmonic instability
of the diurnal internal tide in the South China Sea, Geophys. Res. Lett.,
35, L15602, doi: 10.1029/2008GLO34720.
G. S. Carter, M. C. Gregg, and M.A. Merrifield (2006). Flow and mixing
around a small seamount on Kaena Ridge, Hawaii, J. Phys. Oceanogr.,
36:1036-1052.
Reprints are available by calling 206-543-1272.
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Research Experiments:
Andrew Cookson, Eric Boget, and Matthew Alford, together with graduate student Kim Martini and postdoc Zhongxiang Zhao, just completed a major field experiment north of Hawaii. In two cruises totaling 50 days on R/V Roger Revelle from April through June 2006, we collected data that we hope will allow us to unravel some of the processes that befall the "internal tide," a large underwater disturbance that is generated at the Hawaiian Ridge and travels at least 1000-2000 km northward. Because it carries a substantial amount of energy, knowing where it "breaks" (in analogy with surface waves seen breaking on beaches) is important for improving models of the Earth's
climate.
Internal Waves Across the Pacific (IWAP) is a $2.6M NSF-funded collaborative
project with several Scripps researchers - Drs. Jennifer Mackinnon, Kraig
Winters (both formerly at APL-UW), Walter Munk, and Rob Pinkel. The
experiment's name is in honor of Walter's 60-year old result "Waves Across
the Pacific," where he showed that the surface waves we see on beaches have
likewise traveled all the way across ocean basins.
To measure the travel of the internal tide over these large distances, we
used a combination of techniques. The backbone of the experiment was six
moorings (picture 1, red dots) aligned with Hawaii's strongest "beam" of
tidal energy flux (arrows), which emanates from French Frigate Shoals, a
shallow ridge northwest of the beautiful Hawaiian Islands. Each mooring
consisted of a McLane moored profiler, which crawls up and down
the mooring wire between 80-1400 meters beneath the surface each hour and a
half, measuring temperature, salinity, and velocity. ADCPs, Anderaa current
meters, and Sea-bird temperature loggers were also used to capture the
shallower and deeper signals. Many of these instruments were borrowed from
other PI's, and we owe them a great debt of gratitude for their generosity.
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