Not exact matches
These components — specifically aerosols (particulates in the air — dust, soot, sulphates, nitrates, pollen etc.) and atmospheric
chemistry (
ozone, methane)-- are both
affected by climate and
affect climate, since aerosols and
ozone can interact, absorb, reflect or scatter solar and thermal radiation.
Stratospheric aerosols
affect the
chemistry and transport processes in the stratosphere, resulting in the depletion of
ozone (Brasseur and Granier, 1992; Tie et al., 1994; Solomon et al., 1996; Chipperfield et al., 2003).
Fourth, volcanic aerosols provide surfaces for heterogeneous
chemistry affecting global stratospheric
ozone distributions (Chipperfield et al., 2003) and perturbing other trace gases for a considerable period following an eruption.
For the runs with different emission and «climate» years, e.g. Em2000Cl1850, emissions of aerosol and
ozone precursors are set to 2000, methane amounts for
chemistry are set to 2000, but
ozone and methane at 2000 do not
affect the radiation (i.e. radiation sees 1850 «climate» conditions for everything but aerosols).
Thus while in theory, a revision in
ozone chemistry, or soil respiration or aerosol properties might impact the full ESM, it won't
affect the more basic stuff (like the sensitivity to CO2).
Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase
chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like
ozone + the physical and optical properties of aerosols, which
affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.