Table 1.
35S activity of aerosol 
found in particles > 1.5 μm in size at Scripps Institution of Oceanography and San Fernando Valley
| Sample | dpm per sample |  |
dpm/μmol S | dpm/μmol nss-S | %NSS |
| SFV 9/3/2007* | 4.90 ± 3.83 | 453 ± 347 | 0.21 ± 0.16 | 0.34 ± 0.26 | 60.2% |
| SFV 9/7/2007* | -2.06 ± 3.61 | - 187 ± 328 | -0.05 ± 0.09 | -0.12 ± 0.21 | 42.9% |
| SFV 9/16/2007* | -0.88 ± 3.11 | -80 ± 282 | -0.02 ± 0.09 | -0.05 ± 0.19 | 45.9% |
| SFV 7/21/2008 | 16.47 ± 1.06 | 1494 ± 96 | 0.43 ± 0.03 | 1.23 ± 0.08 | 34.9% |
| SFV 7/25/2008 | -0.30 ± 1.33 | -27 ± 121 | -0.01 ± 0.03 | -0.02 ± 0.11 | 29.4% |
| SFV 7/28/2008 | 5.62 ± 1.22 | 510 ± 111 | 0.16 ± 0.03 | 1.01 ± 0.22 | 15.5% |
| SVF 8/1/2008 | 3.84 ± 1.09 | 349 ± 99 | 0.09 ± 0.02 | 0.22 ± 0.06 | 39.8% |
| SIO 9/4/2007* | -0.021 ± 0.643 | -2 ± 58 | 0 ± 0.01 | - | 0 |
| SIO 9/7/2007* | -0.122 ± 0.653 | -11 ± 59 | 0 ± 0.01 | - | 0 |
| SIO 9/11/2007* | -0.138 ± 0.691 | -16 ± 63 | 0 ± 0.007 | - | 0 |
| SIO 7/21/2008 | 2.16 ± 0.84 | 196 ± 76 | 0.36 ± 0.14 | - | 0 |
| SIO 7/25/2008 | 3.06 ± 0.86 | 278 ± 78 | 0.10 ± 0.03 | - | 0 |
| SIO 7/28/2008 | -1.62 ± 0.74 | -147 ± 67 | -0.06 ± 0.03 | - | 0 |
| SIO 8/1/2008 | 2.26 ± 0.77 | 205 ± 70 | 0.07 ± 0.02 | - | 0 |
Samples measured as BaSO4(s) are indicated using *. All other samples (2008) were measured as Na2SO4(aq). Air volume per sample (Vair) was equal to 2,000 m3 and the total number of 35S(35N) in each sample was determined using the relationship 
, where 
is the radioactive-decay half-life of 35S expressed in minutes and dpm is the measured activity of the sample in units of disintegrations per minute at the time of collection. The volumetric concentrations of 35S were calculated as 
. Non-sea-salt sulfate was determined using anion and cation measurements of aerosol samples and the molar ratio of sulfate to sodium (0.0604) in sea-salt spray.