Gliders in the Gulf Stream

WHOI first deployed Spray gliders to survey across the Gulf Stream in 2004. Observations from early missions crossing the Gulf Stream downstream of Cape Hatteras were used examine the potential vorticity structure of the Gulf Stream [Todd, et al. 2016a]. Since 2015, Spray gliders have been routinely deployed off Miami, FL, then piloted back and forth across the Gulf Stream as they are advected downstream, and then recovered south of Woods Hole. These new observations have already revealed the presence of large-amplitude, high-frequency internal waves and deep bottom mixed layers where the Gulf Stream flows over varied bathymetry upstream of Cape Hatteras. Realtime observations are made available for operations uses via the Global Telecommunications System (GTS), where they have made significant impacts on operational ocean models. Our Gulf Stream work has been funded by the National Science Foundation, the Office of Naval Research, the National Oceanic and Atmospheric Administration, Eastman, WHOI’s Oceans and Climate Change Institute, and WHOI’s W. Van Allen Clark, Jr. Chair for Excellence in Oceanography. (Todd, Owens)

Processes driving Exchange At Cape Hatteras (PEACH)

In collaboration with colleagues at Skidaway Institute of Oceanography, the University of North Carolina, North Carolina State University, and WHOI, we will study the dynamics of exchange between the continental shelf and deep ocean in the vicinity of Cape Hatteras, NC. At Cape Hatteras, the Gulf Stream separates from the continental margin while flows from the north and south converge on the continental shelf. Beginning in April 2017, we will use Spray gliders to conduct repeated surveys along the edge of the continental shelf just north of Cape Hatteras. These surveys will directly measure exchange between the shelf and deep ocean for a two-year period. This work is funded by the National Science Foundation. (Todd)

Arabian Sea Circulation and Variability

As part of the ‘Northern Arabian Sea Circulation–autonomous research’ (NASCar) program, Spray and Slocum gliders will be deployed fro the Seychelles during 2016 and 2017. This program is funded by the Office of Naval Research. (Todd)

Repeat Observations by Gliders in the Equatorial Region (ROGER)

In collaboration with colleagues at Scripps, Spray gliders have been deployed from the Galápagos Islands to investigate the Equatorial Undercurrent and Equatorial Front near 93°W. Glider-mounted ADCPs are critical to the ROGER field campaign since geostrophic velocity calculations are not possible at the Equator. This program is funded by the National Science Foundation. (Owens, Todd)

Storms on the New England Continental Shelf

As part of the CINAR TEMPESTS program, which aims to improve storm intensity forecasting along the US East Coast, a Slocum glider has been deployed during winter storms and during Hurricane Arthur to capture detailed measurements of water column structure and circulation over the continental shelf south of New England. This program is funded by the National Oceanic and Atmospheric Administration. (Todd)