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| Titel |
A numerical evaluation of global oceanic emissions of α-pinene and isoprene |
| VerfasserIn |
G. Luo, F. Yu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 4 ; Nr. 10, no. 4 (2010-02-19), S.2007-2015 |
| Datensatznummer |
250008130
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| Publikation (Nr.) |
 copernicus.org/acp-10-2007-2010.pdf |
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| Zusammenfassung |
| A numerical evaluation of global oceanic emissions of α-pinene and
isoprene based on both "bottom-up" and "top-down" methods is presented. We
infer that the global "bottom-up" oceanic emissions of α-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
α-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 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 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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