Chemically, there will be an increase in ozone depletion (due to increases in heterogenous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime. (treehugger.com)
The idea behind spraying sea salt into the atmosphere is to increase the concentration of cloud condensation nuclei (CCN), which should increase cloud brightness (albedo) via the Twomey effect (and possibly increase cloud lifetime). (realclimate.org)
Chemically, there will be an increase in ozone depletion (due to increases in heterogeneous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime. (realclimate.org)