MARINE AEROSOLS - STORMY SEAS, SALT DEPOSITION AND ENVIRONMENTAL CORROSIVITY

摘要

At proposed building sites the environmental corrosivity rate of metals does not need to be known to a decimal place, and it may be possible to determine the approximate corrosivity based on observations and existing data bases. Data such as distance to sea, coastline structure, topography, wind speed, wind fetch, sea bed profile, surf zone topography, and number of stormy days per year. There is information available that indicates the significance of these factors but it requires to be investigated under local conditions. The initial surf zone topography in the New Zealand environment has provided results that may account for the high salt content found more than 50km inland by previous researchers. The results indicate that during low wind speeds of 10m·s~(-1) the sandy beaches generate more aerosols than the rocky shoreline and that there is a large proportion of jumbo PM+10 aerosols, which have significantly more volume. The relationship between the size of aerosols and the various surface deposition rate techniques was not determined and further research is required.