Other ID: none
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Principal Investigator(s): Carolyn Ruppel
Information Specialist(s): Carolyn Ruppel
Data Type(s): Location-Elevation: Navigation, Seismics: Sparker, Seismics: Sub Bottom Profiler, Sonar: Sidescan, Sonar: Single Beam
Scientific Purpose/Goals: 1) Image seafloor. 2) Map top of subsea permafrost in very near shore. 3) Survey for possible methane emissions at distal inferred end of permafrost offshore. 4) Collect data to help constrain whether seaward limit of permafrost is 'real' or related to a lithologic change.
Start Port/Location: Prudhoe Bay West Dock, AK
End Port/Location: Prudhoe Bay West Dock, AK
Start Date: 2010-08-03
End Date: 2010-08-09
Equipment Used: GPS (wh), Sparker system, Single channel hydrophone, EdgeTech 424 chirp sub-bottom profiler, Edgetech DF-1000 sidescan sonar, Humminbird fishfinder
Information to be Derived:
Summary of Activity and Data Gathered: Transit from Prudhoe Bay West Dock to eastern Harrison Bay; collected seismic data along lines running NE-SW and long tie lines running WNW to ESE until weather turned bad.
Staff: Charles Worley
USGS-Menlo Park; observer from the community of Nuiqsut
NEPA CX USGS;
NMFS Letter of Concurrence;
FWS letter for ESA birds obtained;
FWS no ESA needed for fish;
FWS MMPA/ESA polar bear consultation underway;
Tribal council mtg interaction on 19 June 2010;
North Slope Borough permit;
discussion started with private sector operator that may be in study area during the survey on a ~70 m vessel.
Project = Methane Hydrate - Dept. of Energy, Methane Hydrate - Dept. of Energy
centered on Harrison Bay, shallow Beaufort Sea, Alaska, United States, North America, Arctic Ocean;
|North: 70.97403||South: 70.33353||West: -153.083||East: -149.87549|
Ruppel, C., Brothers, L., Hart, P., and Pohlman, J, 2012, Warming-Driven Dissociation of Gas Hydrates on the Continental Shelf and Upper Continental Slope of the US Beaufort Seas [abs.]: , Arctic Frontiers 2012. Tromso, Norway, January 20, 2012.
Ruppel, C., Brothers, L., Hart, P., Maue, C., Pohlman, J., Kessler, J., Sparrow, K.M., and Worley, C, 2012, Methane Dynamics Associated with Long-Term Climate Change on the Alaskan Beaufort Sea Inner-Shelf: DOE, Fire in the Ice Newsletter, .
|Survey Equipment||Survey Info||Data Type(s)||Data Collected|
|EdgeTech 424 chirp sub-bottom profiler||---||Sub Bottom Profiler|
|Single channel hydrophone||---||Air Gun / Water Gun|
Sub Bottom Profiler
|Humminbird fishfinder||---||Single Beam|
|Edgetech DF-1000 sidescan sonar||---||Sidescan|