Figure 5.11: Aerosol optical
depth derived from AVHRR satellite analysis following Nakajima et al. (1999) (labelled
result: 1 and result: 2), Mishchenko et al. (1999) and Stowe et al. (1997) for
January, April, July and October. The results from Nakajima refer to 1990, while
those from Mishchenko and Stowe refer to an average over the years 1985 to 1988.
The results derived from the models which participated in the IPCCsponsored workshop
are also shown (see Table 5.8). The case labelled
“summed sensitivity study” shows the derived optical depth for the ECHAM/GRANTOUR
model using a factor of two increase in the DMS flux and the monthly average sea
salt fluxes derived using the SSM/I wind fields.