Altitude, chemical composition marine aerosol salt

Relative Chemical Composition of Marine Aerosol Salt vs. Altitude... 

Several workers (39, 49, 50) have shown that the atmospheric concentration of salt derived from the ocean surface decreases rapidly to small values at an altitude of about 2 km. Are there also changes in chemical composition in the salt fraction of the marine aerosol with... 

In many instances the chemical composition of oceanic rain has been used to draw conclusions concerning the chemical composition of marine aerosols (3, 52, S3, 54). The first two entries in Table V emphasize the trends with respect to altitude for our data on rain samples collected in Hawaii. The 100-meter sample was collected near the coast, and the 1000-meter sample was obtained several miles inland in the Hawaiian mountains. The results for F/Cl, Cl/Na, and Na/F in the 100-meter sample agree with the results found for marine aerosol salt fractions given in Table II, and differ only slightly from those of sea water. 

Study (4, 52). The aerosol salt composition may be further modified when the droplets are carried to higher altitudes where they lose water by evaporation, crystallize, and then lose other constituents such as chlorine gas (12, 26,64). Another possibility of change in the chemical composition is the reaction of the aerosol salt with atmospheric gases such as elemental iodine, which originates at the ocean surface (65). In addition, soluble particles are produced from gaseous compounds in the marine atmosphere, such as the production of (NH4)oS04 via the atmospheric oxidation of SO-j (9). 

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