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| Titel |
Fog deposition to a Tillandsia carpet in the Atacama Desert |
| VerfasserIn |
A. Westbeld, O. Klemm, F. Griessbaum, E. Sträter, H. Larrain, P. Osses, P. Cereceda |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 9 ; Nr. 27, no. 9 (2009-09-25), S.3571-3576 |
| Datensatznummer |
250016651
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3571-2009.pdf |
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| Zusammenfassung |
| In the Atacama Desert, one of the driest places on earth, fog deposition
plays an important role for the water balance and for the survival of
vulnerable ecosystems. The eddy covariance method, previously applied for the
quantification of fog deposition to forests in various parts of the world,
was used for the first time to measure deposition of fog water to a desert.
In this exploratory study we estimate the amount of water available for the
ecosystem by deposition and determine the relevant processes driving fog
deposition. This is especially important for the species Tillandsia
landbecki living in coastal Atacama at the limit of plant existence with
fog and dew being the only sources of water. Between 31 July and 19 August
2008 approximately 2.5 L m−2 of water were made available
through deposition. Whole-year deposition was estimated as 25 L m−2. Turbulent upward fluxes occurred several times during
the evenings and are explained by the formation of radiation fog. In
connection with that, underestimates of the deposition are assumed. More
detailed studies covering various seasons and all parameters and fluxes
contributing to the local energy balance are suggested. This will help to
further develop understanding about the processes of (i) deposition of water
to the desert, and (ii) intensification of advection fog through additional
formation of radiation fog. |
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