Solute deposition from cloud water to the canopy of a Puerto Rican montane forest

TitleSolute deposition from cloud water to the canopy of a Puerto Rican montane forest
Publication TypeJournal Article
Year of Publication1994
AuthorsAsbury, CE, McDowell, WH, Trinidad-Pizarro, R, Berrios, S
JournalAtmospheric Environment
Volume28
Pagination1773-1780
Accession NumberLUQ.17
Keywordstropics
Abstract

Deposition of cloud water and dissolved solutes onto vegetation was studied by sampling clouds, throughfall and stemflow during 12 cloud-only events at Pico Del Este, a tropical cloud forest in the Luquillo Mountains of Puerto Rico. Liquid water content of the sampled clouds was low (0.016 g m−3), but deposition of water (1.3 mm d−1)was comparable to other sites, apparently due to efficient capture of clouds by epiphyte-laden vegetation. Elemental deposition by cloud water was similar to that in other, more polluted sites, but was only 8–30% of total deposition (cloud-only plus rain) due to the high rainfall at the site (approximately 5 m). Na and CI from marine aerosols dominated cloud chemistry, with concentrations of 400 μeqδ−1. Sulfate and nitrate concentrations were 180 and 60 μedδ−1, respectively. After passage through the canopy, concentrations of base cations in deposited cloud water increased, and concentrations of nitrogen decreased.

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