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Atmos. Chem. Phys. Discuss., 9, 20721-20738, 2009
www.atmos-chem-phys-discuss.net/9/20721/2009/ doi:10.5194/acpd-9-20721-2009 © Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. |
A numerical evaluation of global oceanic emissions of α-pinene and isoprene
Atmospheric Sciences Research Center, State University of New York, 251 Fuller Road, Albany, New York 12203, USA
Abstract. A numerical evaluation of global oceanic emissions of α-pinene and isoprene based on both "bottom-up" and "top-down" methods is presented. As far as we know, this is the first quantification of global oceanic emission of α-pinene. We infer that the global "bottom-up" oceanic emissions of α-pinene and isoprene are 0.013 Tg C yr−1 and 0.32 Tg C yr−1, respectively. By constraining global chemistry model simulations with the shipboard measurement of Organics over the Ocean Modifying Particles in both Hemispheres summer cruise, we derived the global "top-down" oceanic α-pinene source of 35.1 Tg C yr−1 and isoprene source of 2.5 Tg C yr−1. The global oceanic α-pinene source and its impact on organic aerosol formation is significant based on "top-down" method, but is negligible based on "bottom-up" approach. Our research highlights the importance to carry out further research (especially measurements) to resolve the large offset in the derived oceanic organic emission based on two different approaches.
Citation: Luo, G. and Yu, F.: A numerical evaluation of global oceanic emissions of α-pinene and isoprene, Atmos. Chem. Phys. Discuss., 9, 20721-20738, doi:10.5194/acpd-9-20721-2009, 2009.