DIMETHYL SULFIDE AND CLOUD CONDENSATION NUCLEUS CORRELATIONS IN THE NORTHEAST PACIFIC-OCEAN

A regression analysis on measurements of cloud condensation nucleus (CCN) and dimethyl sulfide (DMS) concentrations in the boundary layer over the northeastern Pacific Ocean shows these two parameters to be highly correlated. This complements and supports coherent seasonal trend data on DMS and CCN concentrations obtained at Cape Grim, Tasmania. The correlation between CCN and DMS at both northern and southern hemispheric remote marine sites, provides empirical support for the DMS-cloud-climate hypothesis. A possible nonlinear relationship between DMS and size-segregated CCN concentrations is suggested by the data.