Gioda A, Mayol-Bracero OL, Morales-Garcia F, Collett J, Decesari S, Emblico L, Facchini MC, Morales-De Jesus Ricardo, Mertes S, Borrmann S, Walter S, Schneider J
As part of the Rain In Cumulus over the Ocean Experiment (RICO) and the Puerto Rico Aerosol and Cloud Study (PRACS), cloud water was collected at East Peak (EP) in Puerto Rico. The main objective of this study was to determine the concentrations of water-soluble species (Cl-, NO3 (-), SO4 (2-), NH4 (+), Ca2+, H+, Mg2+, K+, and Na+) in water samples taken from clouds influenced by tropical trade winds. The most abundant inorganic species were Na+ (average 465 A mu eq l(-1)) and Cl- (434 A mu eq l(-1)), followed by Mg2+ (105 A mu eq l(-1)), SO4 (2-) (61 A mu eq l(-1)), and NO3 (-) (25 A mu eq l(-1)). High concentrations of nss-SO4 (2) (28 A mu eq l(-1)), NO3 (-) (86 A mu eq l(-1)), and H+ (14.5 A mu eq l(-1)) were measured with a shift in air masses origin from the North Atlantic to North American continent, which reflected a strong anthropogenic influence on cloud chemistry at EP. Long-range transport of particles and acid gases seems to be the factor responsible for fluctuations in concentrations and pH of cloud water at East Peak. When under trade wind influences the liquid phase concentrations of all inorganic substances were similar to those found in clouds in other clean maritime environments.
Sea salt, Inorganic ions, Cloud chemistry, Cloud condensation nuclei, RICO
Facchini Maria Cristina, Decesari Stefano
ID: 45282
Year: 2009
Type: Articolo in rivista
Creation: 2010-08-12 00:00:00.000
Last update: 2019-12-12 13:41:26.000
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CNR OAI-PMH: oai:it.cnr:prodotti:45282