Hydrographic Measurements in Support of Japan/East Sea Circulation, Ventilation, and Frontal Process Studies Researchers Lynne Talley (SIO), Vyacheslav Lobanov, Pavel Tishchenko, and Vladivmir Ponamarev (POI) Contact Information: Dr. Lynne Talley Physical Oceanography Research Division Scripps Institution of Oceanography University of California at San Diego La Jolla, CA 92093-0230 Phone: (619) 534-6610 Fax: (619) 534-9820 ltalley@ucsd.edu Dr. Vyacheslav B. Lobanov Deputy Director Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences 43 Baltiyskaya Street, Vladivostok 690041, Russia Phone: 7 4232 312377 Fax: 7 4232 312573 lvb@fastmail.vladivostok.ru Award Number N00014-98-1-0220 Objectives and Approach To obtain a complete synoptic view of the vertically-layered structure and major components of the circulation of the Japan/East Sea, researchers conducted a complete shipboard surface-to-bottom hydrographic survey of the entire Japan/East Sea in conjunction with Russian, Korean, and Japanese investigators. Two hydrographic surveys (temperature and salinity) of the Japan/East Sea were completed, one during summer 1999 and one during winter 2000. Russian and Korean collaborators carried out related chemical and nutrient analyses for dissolved oxygen, partial pressure of CO2, nitrogen, phosphate and silicate, and other chemical tracers. Data will be analyzed in conjunction with other investigators and modelers to elucidate the circulation.