Multibeam Mapping of Feature Rich Seafloor in the U.S. Pacific Remote Islands Marine National Monument and on Mendocino Ridge off the California Coast

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1 University of New Hampshire University of New Hampshire Scholars' Repository Center for Coastal and Ocean Mapping Center for Coastal and Ocean Mapping Multibeam Mapping of Feature Rich Seafloor in the U.S. Pacific Remote Islands Marine National Monument and on Mendocino Ridge off the California Coast Andy Armstrong University of New Hampshire, Durham James V. Gardner University of New Hampshire, Durham, Brian R. Calder University of New Hampshire, Durham, Giuseppe Masetti University of New Hampshire, Durham, Follow this and additional works at: Part of the Oceanography and Atmospheric Sciences and Meteorology Commons Recommended Citation A. A. Armstrong, James V. Gardner, Calder, Brian R., and Masetti, G., Multibeam Mapping of Feature Rich Seafloor in the U.S. Pacific Remote Islands Marine National Monument and on Mendocino Ridge off the California Coast, U.S. Hydrographic Conference. The Hydrographic Society of America, National Harbor, MD, This Conference Proceeding is brought to you for free and open access by the Center for Coastal and Ocean Mapping at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Center for Coastal and Ocean Mapping by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact

2 Multibeam Mapping of Feature Rich Seafloor in the U.S. Pacific Remote Islands Marine National Monument and on Mendocino Ridge off the California Coast This conference proceeding is available at University of New Hampshire Scholars' Repository:

3 Multibeam Mapping of Feature- Rich Seafloor in the U.S. Pacific Remote Islands Marine National Monument and on Mendocino Ridge off the California Coast Andrew Armstrong, James Gardner, Brian Calder, Giuseppe Masetti NOAA/UNH Joint Hydrographic Center and UNH Center for Coastal and Ocean Mapping

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8 R/V Kilo Moana 2014 Kongsberg EM khz Multibeam Echo Sounder

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10 Proclamation 9173 of September 25, 2014 Pacific Remote Islands Marine National Monument Expansion By the President of the United States of America A significant geological feature of the adjacent areas is the undersea mountains. A seamount is a mountain rising from the seabed that does not reach the sea surface. Most often seamounts occur in chains or clusters. Nearly all of the seamounts in the adjacent areas are volcanoes: some are still erupting actively, and others stopped erupting long ago. The Monument includes 33 seamounts; the adjacent areas include approximately 132 more. The additional seamounts provide important opportunities for scientific exploration and study. Estimates are that 15 to 44 percent of the species on a seamount or seamount group are found nowhere else on Earth. Roughly 5 to 10 percent of invertebrates found on each survey of a seamount are new to science. Some seamounts have pools of undiscovered species. The approximately 132 seamounts in the adjacent areas provide the opportunity for identification and discovery of many species not yet known to humans, with possibilities for research, medicines, and other important uses.

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18 NOAA Ship Okeanos Explorer 2009 Kongsberg EM khz Multibeam Echo Sounder R/V Atlantis 2014 Kongsberg EM khz Multibeam Echo Sounder

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25 Peak: 1889 m Base: 4570 m 2681 m of relief in 12 km distance

26 Acknowledgements Ship s Companies NOAA Ship Okeanos Explorer University of Hawaii R/V Kilo Moana Woods Hole Oceanographic Institution R/V Atlantis Chief Scientists and Science Parties NOAA Office of Ocean Exploration NOAA Office of Coast Survey NOAA National Geophysical Data Center University of New Hampshire