Thursday, December 25, 2014
YOLO COUNTY NEWS
99 CENTS

Detection of Japanese tsunami opens door to new radar use

By
From page A1 | August 18, 2011 |

The tsunami that devastated Japan on March 11 was picked up by high-frequency radar in California and Japan as it swept toward their coasts, according to U.S. and Japanese scientists. This is the first time that a tsunami has been observed by radar, raising the possibility of new early warning systems.

“It could be really useful in areas such as southeast Asia where there are huge areas of shallow continental shelf,” said professor John Largier, an oceanographer at the UC Davis Bodega Marine Laboratory, and an author of a new paper describing the work. The paper appears this month in the journal Remote Sensing.

Largier and his colleagues have been using a high-frequency radar array at the Bodega Marine Lab to study ocean currents for the past 10 years. The Bodega lab is part of a network of coastal radar sites funded by the state of California for oceanographic research.

Largier, together with collaborators from Hokkaido and Kyoto universities in Japan and San Francisco State University, used data from radar sites at Bodega Bay and Trinidad in California and two sites in Hokkaido, Japan, to look for the tsunami offshore.

The scientists found that the radar picks up not the actual tsunami wave — which is small in height while out at sea — but changes in currents as the wave passes.

The researchers found they could see the tsunami once it entered shallower coastal waters over the continental shelf. As the waves enter shallower water, they slow down, increase in height and decrease in wavelength until finally hitting the coast.

The continental shelf off the California coast is quite narrow, and approaches to the coast are already well-monitored by pressure gauges, Largier noted. But he said radar detection could be useful, for example, on the East Coast or in Southeast Asia, where there are wide expanses of shallow seas.

— UC Davis News Service

Comments

comments

  • Recent Posts

  • Enter your email address to subscribe to this newspaper and receive notifications of new articles by email.

  • .

    News

    Make that box bark: Studies show pets are good gifts

    By Dave Ryan | From Page: A1 | Gallery

     
    Want some company? Enjoy food, fellowship at Holiday Meal

    By Enterprise staff | From Page: A1

    Hit-and-run victim hopes for driver’s arrest

    By Lauren Keene | From Page: A1 | Gallery

     
    No reindeer games for this student researcher

    By Jeff Hudson | From Page: A1 | Gallery

    Faithful flock to Bethlehem for Christmas

    By The Associated Press | From Page: A2 | Gallery

     
    Travel looks rough into Christmas Day

    By The Associated Press | From Page: A2

     
    Applications for jobless aid fall to 7-week low

    By The Associated Press | From Page: A2

    Supplies collected for victims of abuse

    By Enterprise staff | From Page: A3

     
    Luminaria display planned in West Davis

    By Enterprise staff | From Page: A3

    Gary Lee Yoder featured on ‘Davisville’

    By Enterprise staff | From Page: A3

     
    Seniors set to stroll through Arboretum

    By Enterprise staff | From Page: A3

     
    Pedal around Davis on weekly bike ride

    By Enterprise staff | From Page: A3

    Nobel Prize winner will discuss research related to autism

    By Special to The Enterprise | From Page: A4

     
    Why not give a shelter pet as a gift?

    By Enterprise staff | From Page: A5

     
    Merry Christmas!

    By Enterprise staff | From Page: A8

     
    .

    Forum

    He isn’t ready to listen yet

    By Creators Syndicate | From Page: B5

     
    Thanks for the winter shelter

    By Letters to the Editor | From Page: A6

    Great experience for students

    By Letters to the Editor | From Page: A6

     
    Davis comes through again for UNICEF

    By Special to The Enterprise | From Page: A6

     
    There was much to think about

    By Letters to the Editor | From Page: A6

    .

    Sports

    River Cats to show off Giants World Series trophies

    By Enterprise staff | From Page: B1 | Gallery

     
    Legacy announces huge add-on to youth soccer complex

    By Bruce Gallaudet | From Page: B1, 1 Comment | Gallery

    Carrs drive DHS wrestling weekend

    By Enterprise staff | From Page: B1 | Gallery

     
    College Bowl roundup: Navy nips Aztecs in San Diego

    By The Associated Press | From Page: B2 | Gallery

    Devil JV hoopsters take third at Les Curry

    By Enterprise staff | From Page: B2

     
    Busy 2015 tourney slate unveiled by Legacy soccer

    By Bruce Gallaudet | From Page: B8

    .

    Features

    .

    Arts

    Plenty of local party options on New Year’s Eve

    By Enterprise staff | From Page: A7 | Gallery

     
    Wineaux: Here’s to a sparkling new year

    By Susan Leonardi | From Page: A7

    .

    Business

    .

    Obituaries

    James J. Dunning Jr.

    By Special to The Enterprise | From Page: A4

     
    Floyd W. Fenocchio

    By Special to The Enterprise | From Page: A4

    .

    Comics