the first Hawaii flux experiment (wet season) in February-March, 1979: and the second Hawaii flux experiment (dry season) in July-August, 1979. In the third year the second set of flux experiments will take place in the southern hemisphere at American Samoa. Since the tower and building constructed and operated in 1976 as part of Duce, Fitzgerald, and Patterson's research in the PTP was considerably damaged by a hurricane in December, 1976, repairs and reconstruction of this facility will be necessary in the spring of 1980, but it is expected that the tower from Hawaii will be transported and reerected in Samoa in early 1980. The first Samca flux experiment will probably take place in July-August, 1980, (dry season) and the second Samoa flux experiment in January-February, 1981, (wet season). If completion of the Hawaii field program and subsequent analyses will allow it, the Samoa experiments will be moved forward by about six months. B. Source Experiments 17. Marine Sources - BIMS Experiment The initial BIMS experiment will be a test investigation of the chemical measurements using BIMS coupled with bubble number/area measurements. This test experiment will take place on Narragansett Bay, Rhode Island in June, 1978. The first open ocean BIMS experiment will take place on R/V ENDEAVOR in the Caribbean in July, 1979. The second open ocean BIMS experi- ment will take place in the coastal upwelling region off Peru in the winter of 1980-81. 2. Continental Sources a. Forest Fire Experiment A specific forest fire experiment will take place at an as yet undetermined site in the western United States during the summer of 1981. o