During the first cruise operated by the United States of America and the People's Republic of China cooperative program, from December 12, 1985, to February 21, 1986, aerosol samples were collected with a KA-200 Anderson cascade impactor and a KB-120 sampler. Neutron activation analysis was used to determine the elemental composition of the aerosols. Maximum mass concentrations of sea-salt elements (Na, Cl, and Br) were found in the size range 3.3--4.7 μm. The ''bulk'' enrichment factor for Cl in aerosols, relative to Na in seawater, was close to unity, but a very pronounced depletion was found for Br. The enrichment factor for Cl in different size ranges decreased with increasing particle size and for Br had a U-shaped curve. The size distributions for Fe, Al, and Sc over the remote ocean and over the ocean area close to the Asian continent were quite different. Aerosols over the western Pacific showed significant enrichment of Sb and Se, relative to Fe. Some characteristics of marine aerosols are discussed as they relate to long-range transport of crustal elements and pollution elements from the Asian continent to the western Pacific. ¿ American Geophysical Union 1990