Download - Mapping in Support of Law of the Sea
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Mapping in Support of Mapping in Support of Law of the SeaLaw of the Sea
Center for Coastal and Ocean Mapping / NOAA-UNH Joint Hydrographic Center
University of New Hampshire, USA
A presentation on A presentation on
HEALY 07-03HEALY 07-03
to the Alaska Eskimo Whaling to the Alaska Eskimo Whaling CommissionCommission
Larry Mayer and Andy Armstrong
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UN Law of the Sea TreatyUN Law of the Sea Treaty
• A coastal nation may claim sovereignty over A coastal nation may claim sovereignty over the seabed and subsoil (including the seabed and subsoil (including environmental protection) of the continental environmental protection) of the continental margin beyond their current 200 n.m. margin beyond their current 200 n.m. Exclusive Economic Zone (EEZ) under Article Exclusive Economic Zone (EEZ) under Article 76 of the United Nations Convention on the 76 of the United Nations Convention on the Law of the Sea (UNCLOSLaw of the Sea (UNCLOS) )
• if… the shape of the seafloor meets certain if… the shape of the seafloor meets certain criteriacriteria
• thethe 2500 m (~8250 ft) depth line (contour)2500 m (~8250 ft) depth line (contour)
• the “foot of the slope” – (~13,000 – 16,000 the “foot of the slope” – (~13,000 – 16,000 ft)ft)
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http://www.ccom.unh.edu
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U.S. Law of the Sea U.S. Law of the Sea MappingMapping
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Leadline Single Beam Echo Sounder Multibeam Echo Sounder
Measuring the shape of the Measuring the shape of the seafloor seafloor
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A new perspective A new perspective new new insightsinsights
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Beringian MarginBeringian Margin
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Beringian MarginBeringian Margin
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Gulf of AlaskaGulf of Alaska
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Gulf of AlaskaGulf of Alaska
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Chukchi CapChukchi Cap
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USCG HEALYUSCG HEALY
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HEALY 03-HEALY 03-0202
~2000 n.m ~2000 n.m of of
multibeam multibeam echosoundeechosounde
r r bathymetrybathymetry
8/10 ice8/10 ice
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HEALY HEALY 20042004
~4000 nm~4000 nm ofof
multibeam multibeam echosounderechosounder
10/10 ice10/10 ice
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Redefinition of the 2500 m contour
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Discovery and Mapping Discovery and Mapping of a Major Seamountof a Major Seamount
Healy Healy SeamountSeamount
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HEALY 07-03HEALY 07-03Depart Barrow:Depart Barrow:
17 Aug. 0717 Aug. 07Return BarrowReturn Barrow
15 Sept. 0715 Sept. 07
Additional Additional science:science:
1- current studies1- current studies2- deployment of 2- deployment of ice monitoring ice monitoring buoysbuoys3- knowledge of 3- knowledge of seafloor shape seafloor shape critical for climate critical for climate modelingmodeling