SEA Senior Scientist Dr. Hugh Southall has published a new paper in Microwave and Optical Technology Letters. Dr. Southall has long been a leading expert in signal processing, electrical engineering, and radar and antenna technology. SEA is very proud and privileged to bring his expertise to the new and challenging environmental issues on which we are working. This paper is just one example of his exciting and cutting edge research in applying complex signal processing and engineering solutions to tough question.
TRANSVERSE MAGNETIC WAVE REFLECTION FROM A METAMATERIAL
Hugh L. Southall,1 Bae-Ian Wu,2 and Jeffery W. Allen2
1 SEA, Inc., 2 Luan Circle, Chelmsford, MA 01824
2 Sensors Directorate, AFRL/RYHA, 2241 Avionics Circle, Wright-Patterson AFB, OH 45433-7320;
Corresponding author: firstname.lastname@example.org
The article is available online through the following link: http://onlinelibrary.wiley.com/doi/10.1002/mop.27454/abstract
Abstract: It has been shown that transverse electric plane waves reflect from certain types of metamaterials with a unit magnitude reflection coefficient (Smith and Schurig, Phys Rev Lett 90 &899;2003), 077405-1–077405-4).Here we investigate the reflection of transverse magnetic plane waves using a Hertzian dipole over a semi-infinite slab of metamaterial, which is used as a ground plane. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:899–903, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27454
SEA’s Dr. Brandon Southall served as a co-chair of the newly formed Marine Sound Working Group at the World Ocean Council’s 2013 Sustainable Ocean Summit (SOS) which was held earlier this week in Washington DC.
Dr. Southall gave an interview with Maritime TV on the issues related to human sound in the oceans and marine life, the importance of the SOS, and the initiation of the working group. You can see the interview at: <http://maritimetv.com/Events/WorldOceanCouncilSOS2013.aspx?VID=maritime/130423_Maritime_WOC_Interview_Southall.flv#anchor>. Look for other interviews of SOS participants below as well.
Dr. Brandon Southall will give the Science Sunday Lecture this month at UCSC’s Long Marine Laboratory Seymour Center
Sunday, April 21, 1 PM
Ocean Journeys: How I became a marine scientist
Brandon Southall Research Associate, UC Santa Cruz
President and Senior Scientist, SEA, Inc.
Not everyone knows what they want to be when they “grow-up.” And growing up in East Texas doesn’t seem like a direct path to becoming a marine scientist, but that’s how it all started for Brandon Southall.
Bass fishing in Texas, studying fresh water ecology in Montana, and a college exchange opportunity to the University of Hawai’i are just the beginnings of the story that Southall discusses from his new book Ocean Journeys: Beginnings, describing one man’s discovery of the ocean, the animals that live in it, and a passion for understanding and conserving the sea.
Southall will discuss how some of the formative personal and research experiences in his early life and career that shaped and guided his evolution as a marine scientist. These include diving and fishing in Hawai’i and the Florida Keys, tracking turtles on black sand beaches, finding the cold edges of Monterey Bay, and being fully immersed in the amazing science and collaborations at Long Marine Lab. Southall’s adventures led him to Washington DC, around the world, and back again to the Monterey Bay.
Join us at this Science Sunday for a unique look at the person behind the ocean science that is making a difference. Ocean Journeys: Beginnings is available in the Seymour Center’s Ocean Discovery Shop. Southall will be available to sign books immediately following the talk.
More information is available at http://seymourcenter.ucsc.edu
SEA’s very own Ari Friedlaender did a great recent interview with tested.com. Check it out at:
Marine biologists are pretty badass. Just ask Ari Friedlaender about his job hanging off the side of a boat over Antarctic waters with a 25-foot pole trying to tag a whale. He spends most of his life on a boat off countless coasts following families of Humpback and Minke whales in an attempt to understand just a little bit about the biggest animals on the planet. Friedlaender chatted with us about what it’s like when an animal the size of a truck flicks its tail at you.
MARINE SOUND: WOC LAUNCHES INTERNATIONAL OCEAN INDUSTRY WORKING GROUP
Sustainable Ocean Summit Session to Initiate Global Multi-Industry Effort on the Science and Solutions to Sound in the Marine Environment
20 March 2013
The World Ocean Council’s newly formed Marine Sound Working Group is a collaborative industry forum focused on identifying and implementing real-world technical and operational solutions to understand and reduce potential negative impacts of sound from industrial activities on marine life.
Ocean businesses concerned with the marine sound issue are invited to the Sustainable Ocean Summit (SOS 2013) session on this complex challenge to help move forward with cross-sectoral collaboration and leadership in tackling the ocean sound issue.
The WOC Marine Sound Working Group will create business value and economies of scale in addressing marine sound by bringing together a diverse range of industries to:
|The working group will kick off at the SOS 2103 2013 session and begin developing the its focus, likely to include:
The Marine Sound Working Group is co-chaired by two of the world’s leading marine sound experts, Dr. Brandon Southall (SEA, Inc.) and John Young (CSA Sciences, Inc). The co-chairs are clearly aware of (and actively involved in) other efforts to understand and reduce the impacts of sound on marine life, including those of the Oil and Gas Producers Association (OGP) and the International Maritime Organization (IMO). The cross-sectoral WOC Working Group will be structured and focused to create synergies with the important efforts of industry, government and others.
About the Sustainable Ocean Summit 2013 (SOS 2013)
The SOS 2013 (22-24 April, 2013, Washington, D.C.) is the only international ocean business community gathering dedicated to industry leadership and collaboration in developing solutions to ocean sustainability challenges. The theme of SOS 2013 is “Oceans 2050 – The Ocean Business Community and Sustainable Seas”. This event brings together a wide range of ocean industries, including: shipping, oil and gas, fisheries, aquaculture, tourism, renewable energy (wind, wave, tidal), mining, ports, dredging, cables, pipelines, the maritime legal, financial and insurance communities, and others.
For SOS 2013 information, registration and sponsorship opportunities, go to: http://www.oceancouncil.org/site/summit_2013/
|Contact: Paul Holthus, Executive Director Phone: +1 (808) 277-9008
email: email@example.com Web: www.oceancouncil.org
Webcast: Marine Mammals and Military Sonar. Brandon Southall, SEA Inc. and University of California Santa Cruz, will be presenting “Marine Mammal Responses to Simulated Military Sonar: Southern California Behavioral Response Study” on Tuesday, March 12 at noon (4 pm GMT) at the Smithsonian’s National Museum of Natural History.
The talk will be webcast and can be viewed at: http://www.mnh.si.edu/video/live.html
Brandon’s talk will be posted later, a link to his talk will be available at: http://vertebrates.si.edu/mammals/index.html
Transient killer whale studied as part of the SOCAL-BRS research project (photo credit: C. Kyburg taken under NMFS permit #14534-2)
SEA’s own Caroline Casey was recently featured on NPR’s Morning Edition for her fantastic work on elephant seal acoustic behavior as part of her graduate work at UC Santa Cruz. The story is online and has some neat examples of elephant seal calls – please check it out at:
If you have any follow-up questions for Caroline please pass them along as well to <Brandon.Southall@sea-inc.net> and we will get an answer to you. Below is a photo of Caroline and Brandon sampling elephant seal acoustic behavior at Ano Nuevo State Reserve in northern California (credit: A. Friedlaender taken under NMFS permit #14636)
New paper on integrated approaches to studying baleen whales – Ari Friedlaender on BioScience cover!
A new paper was recently published in BioScience, involving a number of SEA partners and BRS collaborators.
Integrative Approaches to the Study of Baleen Whale Diving Behavior, Feeding Performance, and Foraging Ecology
Jeremy A. Goldbogen, Ari S. Friedlaender, John Calambokidis, Megan F. McKenna, Malene Simon and Douglas P. Nowacek
BioScience Vol. 63, No. 2 (February 2013), pp. 90-100
available at: http://www.jstor.org/stable/10.1525/bio.2013.63.2.5
Abstract: For many marine organisms, especially large whales that cannot be studied in laboratory settings, our ability to obtain basic behavioral and physiological data is limited, because these organisms occupy offshore habitats and spend a majority of their time underwater. A class of multisensor, suction-cup-attached archival tags has revolutionized the study of large baleen whales, particularly with respect to the predatory strategies used by these gigantic bulk filter feeders to exploit abundant oceanic resources. By integrating these data with those from other disciplines, researchers have uncovered a diverse and extraordinary set of underwater behaviors, ranging from acrobatic diving maneuvers to extreme feeding events during which whales engulf volumes of prey-laden water that are much larger than their own body. This research framework not only improves our knowledge of the individual performance and behavior of these keystone predators but also informs our ability to understand the dynamics of complex marine ecosystems.
SEA’s own Dr. Ari Friedlaender (in action above) appeared on the cover of BioScience as the article was featured in the most recent issue.
We are proud to note that our very own Ari Friedlaender wrote a great blog for the Smithsonian’s Ocean Hall on our recent paper lead by Jeremy Goldbogen on feeding mechanics in blue whales <see: http://sea-inc.net/2012/12/06/new-paper-on-blue-whale-feeding-behavior/>.
The text is below and you can find it online at <http://ocean.si.edu/blog/acrobatic-blue-whales-do-twist-while-feeding>
I have a vivid childhood memory of sitting under the Blue Whale model hanging in the Natural History Museum, eating an ice cream and wondering how in the world did that whale get so big! Over the past several years a group of researchers have been asking similar questions about just how do whales get so big and how do they eat.
Using small, state-of-the-art suction-cup tags and new visualization tools we can now understand the underwater movements of these ocean giants and how they are able to feed on dense patches of prey to consume up to 1 ton of food a day! Blue whales are in a family of whales that have evolved comb-like baleen and large mouths to gulp huge volumes of prey-rich water and then sieve out the small crustaceans or fish that are their main food source.
What we recently found out was that blue whales, the largest animal to have ever lived on planet Earth, sometimes feed by conducting 360° rolls when they open up their cavernous mouths and lunge into an unsuspecting patch of krill. We found that as the whale approaches the prey patch, it rolls over 180°, on to its back, lunges with mouth agape, and then continues to complete the full roll as it closes its mouth full of prey-laden water. This maneuver is powered by several powerful fluke strokes and tilting its pectoral flippers to help guide the whale through this energetically costly and acrobatic maneuver.
We think that this behavior improves the whales’ chances of engulfing the most krill as possible in a single gulp. Krill, small crustaceans like shrimp, have evolved ways to try and escape from predators when they can see them coming, and blue whales are easier to see than anything else in the ocean given their enormous size. However, if the blue whale feeds from coming up from below the krill where it is dark, they may be able to avoid being detected until the last moment when krill cannot avoid them. The rolling behavior we observed is likely part of an ambush strategy to feed directly from below the krill. The rolling half way over before opening the mouth likely helps to maximize the amount of krill the whale can consume at once.
By coming up from below the krill patch, the whale is also taking advantage of counter-shading, and can see the size and shape of the krill patch as it approaches. The rolling behavior helps the whale because their eyes are on the sides of its head and rolling would allow the whale to see the patch with both eyes and help make its ambush approach as accurate as possible.
While we have not observed such dramatic rolling maneuvers by other baleen whales, we still know very little about how these ocean giants feed and we expect to keep researching these incredible animals to learn new and valuable information on how they live. One thing is for sure, whales are big because they are really good at what they do!
NOAA recently announced the release of a report from a workshop last summer on new tools for visualizing cetacean density and anthropogenic sound. The report is entitled:
National Oceanic and Atmospheric Administration. 2012. Mapping Cetaceans and Sound: Modern Tools for Ocean Management. Final Symposium Report of a Technical Workshop held May 23-24 in Washington, D.C. 83 pp.
and it is available online at: <http://cetsound.noaa.gov>.
Brandon Southall served as a co-chair of the sound field mapping working group in this overall effort.