TY  - JOUR
AU  - Baboukas E., Sciare J. Mihalopoulos N.
PY  - 2004//
TI  - Spatial, Temporal and Interannual variability of methanesulfonate and non-sea-salt sulfate in rainwater in the southern Indian Ocean (Amsterdam, Crozet and Kerguelen Islands)
JO  - Journal of atmospheric chemistry
SP  - 35
EP  - 37
VL  - 48
N2  - Methanesulfonate (MS-) and non-sea-salt sulfate (nss-SO42-), two of the major oxidation products of atmospheric dimethylsulfide (DMS), have been continuously measured in rainwater at three remote islands in the Southern Indian Ocean: Amsterdam since 1991, Crozet since 1992, and Kerguelen since 1993. The annual volume weighted mean (VWM) concentrations of nss-SO42- in rainwater were 3.19, 3.04 and 4.57 µeq l-1 at Amsterdam, Crozet, and Kerguelen, respectively while the VWM of MS- were 0.24, 0.15 and 0.30 µeq l-1, respectively. At all three islands, MS- presented a well-distinguished seasonal variation with a maximum during summer whereas the seasonal variation of nss-SO42- was less pronounced, possibly due to the increased anthropogenic influence during the winter period. Furthermore, MS- presented significant interannual variations, in particular at Amsterdam and Crozet, which is closely related to the sea-surface temperature (SST) anomalies. Finally, the nss-SO42- deposition at Crozet Island presented a decreasing interannual trend, reflecting probably reductions in sulfur emissions from Southern Africa. On the contrary no interannual tendency was observed in the nss-SO42- concentrations at Amsterdam Island, indicating that the biogeochemical sulfur cycle at this area is mainly influenced by biogenic emissions.
SN  - 0167-7764
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=3405), last updated on Tue, 28 Apr 2009 10:48:29 +0200
ID  - BaboukasE.2004
ER  -