Sensitivity of radiative forcing to global carbonaceous emissions

Abstract

A B S T R A C T Direct radiative forcing at top of the atmosphere for black carbon aerosols from two inventories comes out to be '0.33 W m (2 for Global Emission Inventory Activity (GEIA) and '0.14 W m (2 for BOND (Bond et al., 2004). However, for organic matter aerosols, it is simulated as (0.44 W m (2 for GEIA and (0.11 W m (2 with BOND inventory. Simulated annual global burden and aerosol optical depth of carbonaceous aerosols from GEIA and BOND are also compared. Normalised differences plots show that model simulates generally higher values of carbonaceous aerosols with GEIA, which are far superior in some parts of the globe as compared to those simulated with BOND emission inventory. An evaluation of these quantities with the median of the response of the AeroCom models is considered here as a benchmark Á shows that while simulations with GEIA inventory have closer agreement, values of radiative forcing with BOND inventory are comparatively of smaller magnitudes over most parts of the globe. The reasons for this disparity in results for the latter may possibly be attributed to key differences between the two inventories. The main conclusion of this study is that the radiative forcing appears to be highly sensitive to carbonaceous content in aerosol compositions.

Long-term changes in surface solar radiation and their effects on air temperature in the Shanghai region

“…In addition, results of models indicated that direct radiative forcing at top of the atmosphere for some aerosols, e.g. black carbon, comes out to be positive (Bond et al, 2004;Fatima et al, 2012). It was reported that significant temperature increases occurred for latitudes from approximately 30 ∘ N to the equator after the volcanic eruption of Pinatubo in 1992.…”

Long-term (2001–2012) trends of carbonaceous aerosols from a remote island in the western North Pacific: an outflow region of Asian pollutants

“…On the other hand, its impacts on not only climate but also public health may be more severe and intricate (Pöschl, 2005;Menon et al, 2002). Carbonaceous aerosols are ubiquitous in the Earth's atmosphere and potentially cause harmful effect on human health (Bond et al, 2013;Kanakidou et al, 2005;Ramanathan and Carmichael, 2008;Fatima et al, 2012;Chung and Seinfeld, 2002). They are traditionally divided into two fractions: organic carbon (OC), which contains less volatile and more reflective species, and elemental carbon (EC; alternatively referred to as black carbon, BC), which is the least reflective and most light-absorbing component (Pöschl, 2005).…”