Using an explicit emission tagging method in global modeling of source-receptor relationships for black carbon in the Arctic: Variations, sources, and transport pathways

摘要: We introduce an explicit emission tagging technique in the Community Atmosphere Model to quantify source-region-resolved characteristics of black carbon (BC), focusing on Arctic. Explicit BC source regions without perturbing emissions makes it straightforward establish source-receptor relationships and transport pathways, providing a physically consistent computationally efficient approach produce detailed characterization destiny regional potential for mitigation actions. Our analysis shows that contributions major global burden are not proportional respective due strong region-dependent removal rates lifetimes, while direct radiative forcing show near-linear dependence their burden. Distant sources contribute remote mostly mid- upper troposphere, having much less impact lower-level concentrations (and deposition) than Arctic concentrations, deposition all have seasonal variations. Eastern Asia contributes most wintertime Northern Europe more important both surface concentration winter summer. The largest contribution summer is from Asia. Although local more » 10% annual mean within Arctic, per-emission efficiency higher non-Arctic sources. interannual variability (1996-2005) meteorology small but significant yearly means over When slow aging treatment introduced, increase lifetime source-dependent. Global forcing-per-burden also increases primarily changes vertical distributions. relative only slightly, although reduced by factor 2 treatment. « less