Andrew A. Lacis

TL;DR: In this paper, T-matrix computations of light scattering by polydispersions of randomly oriented nonspherical aerosols and Mie computations for equivalent spheres are compared, and it is shown that even moderate nonsphericity results in substantial errors in the retrieved aerosol optical thickness if satellite reflectance measurements are analyzed using Mie theory.

TL;DR: There have been specific improvements in representations of modes of variability (such as the Madden‐Julian Oscillation and other modes in the Pacific) and significant improvements in the simulation of the climate of the Southern Oceans, including sea ice.

TL;DR: It is found that the amount of BC in current climatologies must be increased by a factor of 2–4 to yield best agreement with AERONET, in the approximation in which BC is externally mixed with other aerosols.

TL;DR: Analysis of the long-term Global Aerosol Climatology Project data set reveals a likely decrease of the global optical thickness of tropospheric aerosols during the period from 1991 to 2005, which mirrors the concurrent global increase in solar radiation fluxes at Earth's surface.

TL;DR: This paper investigated the roles of climate forcings and chaos (unforced variability) in climate change via ensembles of climate simulations in which they add forcings one by one, concluding that most interannual climate variability in the period 1979-1996 at middle and high latitudes is chaotic.