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Why Study the Arctic? Participants Sponsors The Adventure Preliminary Findings. BIG PICTURE: GLOBAL CLIMATE. In 1980’s and 1990’s the average extent of permanent pack ice decreased. Evidence indicates that ice thickness is also decreasing. Global Warming?? Earth cycle or

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Why Study the Arctic?

Participants

Sponsors

The Adventure

Preliminary Findings

slide5

BIG PICTURE: GLOBAL CLIMATE

  • In 1980’s and 1990’s
  • the average extent of
  • permanent pack ice
  • decreased.
  • Evidence indicates
  • that ice thickness is
  • also decreasing.
  • Global Warming??
  • Earth cycle or
  • Man-made?

Figure from National Snow and Ice Data Center

NOAA Boulder, Colorado

slide6

FEEDBACK CYCLE

These data, SHEBA Reconnaissance Imagery Version 1.0,

were obtained from the ARCSS Data Coordination Center,

University of Colorado at Boulder

slide7

SCience ICe EXercises

  • 1999 Hawkbill
  • 1998 Hawkbill
  • 1997 Archerfish
  • 1996 Pogy
  • 1995 Cavalla
  • (1993) Pargo

Greenland

Russia

Alaska

slide8

International Bathymetric Chart of the Arctic Ocean, Beta Version

M. Jakobbson, N. Cherkis, J. Woodward, R. Macnab and B. Coakley

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The Participants

USS Hawkbill officers & crew

Ice Camp Lyon staff

Ice pilots

Scientists (submarine & camp)

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Captain Jeffrey Fischbeck & crew

Arctic Submarine Laboratory

UW Applied Physics Laboratory

slide14

J. Gossett, R. Ray, B. Campbell

Arctic Submarine Laboratory

slide16

Chief Scientist Peter Mikhalevsky

ICE CAMP LYON

Photo: G. Peterson;

Sea Power

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From the NY Times

Atlas of the World

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Press Participants from CNN, National Geographic,

Christian Science Monitor and Carey-Mac Productions

(for NOVA).

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Distinguished Visitors

Senator Robb, D-VA

Dr. and Mrs. Hamre, DepSecDef

Mr. Danzig, SecNav

Adm. Johnson, CNO

Dr. Colwell, NSF

Adm. Bowman, DirNavNuclear

Dr. Buchanan, AsstSecNavy

Ms. Novakovic, SpecAsst to Dr. Hamre

Mr. Natter, House Armed Srvc Cmte

Rear Adm. Johnson, AsstDepSecDef

Rear Adm. Konetzni, ComSubPac

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Chukchi Plateau

  • Iceberg scouring
  • Ice sheet scouring
slide77

Water Depth

600-700 m

Indicates

Orientation

Dimensions:

12 km (N-S)

5 km (W-E)

slide78

Lomonosov Ridge

  • Landslides
  • Iceberg/sheet scouring
slide81

Gakkel Ridge

  • Volcanic Eruptions
  • Seismic Disturbances
slide82

M. Tolstoy, Pers. Comm.

Hawkbill surveys site

slide84

Bottom

Detection

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