TY  - JOUR
AU  - Vignati E, Facchini M. C.
PY  - 2010//
TI  - Global scale emission and distribution of sea-spray aerosol: Sea-salt and organic enrichment
JO  - Atmospheric Environment
SP  - 670
EP  - 677
VL  - 44
IS  - 5
KW  - Modelling
KW  - Marine aerosols
KW  - Organics
KW  - Emissions
KW  -
N2  - The chemical composition of marine aerosols as a function of their size is an important parameter for the evaluation of their impact on the global climate system. In this work we model fine particle organic matter emitted by sea spray processes and its influence on the aerosol chemical properties at the global scale using the off-line global Chemistry-Transport Model TM5. TM5 is coupled to a microphysical aerosol dynamics model providing size resolved information on particle masses and numbers. The mass of the emitted sea spray particles is partitioned between water insoluble organic matter (WIOM) and sea salt components in the accumulation mode using a function that relates the emitted organic fraction to the surface ocean chlorophyll-a concentrations. The global emission in the submicron size range of organic matter by sea spray process is 8.2 Tg yr-1, compared to 24 Tg yr-1 sea-salt emissions. When the marine sources are included, the concentrations of modeled primary particulate organic matter (POM) increase mainly over the oceans. The model predictions of WIOM and sea salt are evaluated against measurements carried out at Mace Head (Northern Hemisphere) and Amsterdam Island (Southern Hemisphere), showing that in clean marine conditions WIOM marine emissions contribute significantly to POM values. An estimation of the sea spray organic source in the coarse mode is carried out on the basis of field observations as well as laboratory experiments: the mass of sea spray organic matter in the coarse size range is ca 52% of the total primary organic fraction, leading to a total marine POM emission of 17.2 Tg yr-1.
SN  - 1352-2310
UR  - http://dx.doi.org/10.1016/j.atmosenv.2009.11.013
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=68), last updated on Fri, 05 Jul 2024 23:21:20 +0200
ID  - VignatiE2010
ER  -