Ratnaksha Lele¹, Sarah G Purkey², Jonathan D Nash³, Andreas M Thurnherr⁴, Caitlin B Whalen⁵, Lynne D Talley⁶, Jennifer A MacKinnon⁷, Gunnar Voet⁷ and Sabine Mecking⁵, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States, (3)Oregon State Univ, Corvallis, OR, United States, (4)Lamont-Doherty Earth Observatory, Columbia University, New York, United States, (5)Applied Physics Laboratory University of Washington, Seattle, WA, United States, (6)University of California San Diego, La Jolla, CA, United States, (7)Scripps Institution of Oceanography, La Jolla, CA, United States