共 26 条
A numerical evaluation of global oceanic emissions of α-pinene and isoprene
被引:85
作者:

Luo, G.
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机构:
SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA

Yu, F.
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SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA
机构:
[1] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA
关键词:
SOUTHERN-OCEAN;
AEROSOL;
SEA;
D O I:
10.5194/acp-10-2007-2010
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
A numerical evaluation of global oceanic emissions of alpha-pinene and isoprene based on both "bottom-up" and "top-down" methods is presented. We infer that the global "bottom-up" oceanic emissions of alpha-pinene and isoprene are 0.013 TgC yr(-1) and 0.32 TgC yr(-1), respectively. By constraining global chemistry model simulations with the shipborne measurement of Organics over the Ocean Modifying Particles in both Hemispheres summer cruise, we derived the global "top-down" oceanic alpha-pinene source of 29.5 TgC yr(-1) and isoprene source of 11.6 TgC yr(-1). Both the "bottom-up" and "top-down" values are subject to large uncertainties. The incomplete understanding of the in-situ phytoplankton communities and their range of emission potentials significantly impact the estimated global "bottom-up" oceanic emissions, while the estimated total amounts of the global "top-down" oceanic sources can be influenced by emission parameterizations, model and input data spatial resolutions, boundary layer mixing processes, and the treatments of chemical reactions. The global oceanic alpha-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 of carrying out further research (especially measurements) to resolve the large offset in the derived oceanic organic emission based on two different approaches.
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页码:2007 / 2015
页数:9
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