Images

USGS scientists test the moving arm bottom platform at the Woods Hole Oceanographic Institution (WHOI) dock.  While it was deployed, the system moved sensors through the bottom boundary layer and transmitted data in real time to shore via WHOI's Martha's Vineyard coastal observatory.

USGS scientists assembling a novel profiling arm to measure suspended sediment in the benthic boundary layer. This large seafloor platform was later deployed for several months off Martha's Vineyard, MA as part of the Optics Acoustics and Stress In Situ (OASIS) Project in 2011.

Nice photo-opportunity of USGS working near the North Pole!

USCG Healy is circling to pass CCGS Louis in order to break her free from the ice. The joint field program utilized two icebreakers so that the seismic vessel, with gear in the water behind the ship, could be broken free when the ice prevented her forward progress.

The airgun sled is painted orange and suspended from the A-frame.  The three airguns are suspended beneath the sled. The multichannel digital streamer (yellow cable going into the water from the sled) is towed from the the weighted sled to keep it under the ice. This photo shows the number of crew required to safely deploy the airgun sled.

Deploying the airgun array from CCGS Louis S. St-Laurent. USCGC Healy can be seen in the background.

USCG Healy is circling to pass CCGS Louis in order to break her free from the ice.  The joint field program utilized two icebreakers so that the seismic vessel, with gear in the water behind the ship, could be broken free when the ice prevented her forward progress.

CCGS Louis S. St-Laurent following the path created by USCGC Healy

A breach in the coastline of Rodanthe, North Carolina, caused by Hurricane Irene in 2011. Repeated storm impacts, combined with sea level rise, make the development and improvement of models that help forecast coastal change very important to planners working to build more resilient communities

Fog is common near open-water leads in the Arctic Ocean, and leaves ice everywhere aboard the ship.  A clear blue sky is a bright background to show the thick ice left after the fog lifted.

Electronics for controlling the moving arm in the open pressure housing.

U.S. Geological Survey scientist collecting elevation data on the bluff of Alaska’s north coast.

Eider duck eggs in a nest on Arey Island, Alaska. 

The large white radar dome is a former Distant Early Warning Line site, which sits atop a permafrost bluff on Barter Island, Alaska.

Shaded relief image of Northern Cape Cod Bay, MA

Location of earthquakes as a function of depth and size in the northeastern Caribbean.

Map of the island of Hispaniola that include the countries of Haiti and the Dominican Republic. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault.

Map of the Northeastern Caribbean: topography is in shades of green and bathymetry in shades of blue. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault. Faults outlined in red have a potential to generate a large earthquake.

Comparison of observed near-bed velocities and modeled near-bed velocities using several bottom-roughness formulations. Velocity vectors are overlaid on map of backscatter from the sea floor showing regions with coarse sand (light color) and fine sand (dark colors). White lines are bathymetry contours.

Methane seeping on the Virginia margin just shallower than the limit for gas hydrate stability. 

Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)