Gregory C Roberts^1,2, Kevin J Sanchez¹, Minghui Diao³ and Lynn M Russell⁴, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)CNRM-GAME, Toulouse Cedex 01, France, (3)San Jose State University, Meteorology and Climate Science, San Jose, CA, United States, (4)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States