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Why Study the Arctic? Participants Sponsors The Adventure Preliminary Findings PowerPoint PPT Presentation

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

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Why Study the Arctic?

Participants

Sponsors

The Adventure

Preliminary Findings


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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


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FEEDBACK CYCLE

These data, SHEBA Reconnaissance Imagery Version 1.0,

were obtained from the ARCSS Data Coordination Center,

University of Colorado at Boulder


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  • SCience ICe EXercises

  • 1999 Hawkbill

  • 1998 Hawkbill

  • 1997 Archerfish

  • 1996 Pogy

  • 1995 Cavalla

  • (1993) Pargo

Greenland

Russia

Alaska


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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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CDR Perry, officers & crew of USS Hawkbill

U.S. Navy


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Captain Jeffrey Fischbeck & crew

Arctic Submarine Laboratory

UW Applied Physics Laboratory


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J. Gossett, R. Ray, B. Campbell

Arctic Submarine Laboratory


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Chief Scientist Peter Mikhalevsky

ICE CAMP LYON

Photo: G. Peterson;

Sea Power


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HAWAI`I MAPPING RESEARCH GROUP


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OPERATIONS SPONSORS


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S

C

I

E

N

C

E

S

P

O

N

S

O

R

S


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The Adventure….


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From the NY Times

Atlas of the World


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Photo by Erik Hill, Anchorage Daily News


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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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FINDINGS...


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SCICEX-99 TRACKS


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  • Chukchi Plateau

  • Iceberg scouring

  • Ice sheet scouring


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Water Depth

< 350 m


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Water Depth

600-700 m

Indicates

Orientation

Dimensions:

12 km (N-S)

5 km (W-E)


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  • Lomonosov Ridge

  • Landslides

  • Iceberg/sheet scouring


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  • Gakkel Ridge

  • Volcanic Eruptions

  • Seismic Disturbances


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M. Tolstoy, Pers. Comm.

Hawkbill surveys site


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Bottom

Detection

S

i

d

e

s

c

a

n


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Alaska Margin


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In Conclusion….


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