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| Titel |
Summertime influences of tidal energy advection on the surface energy balance in a mangrove forest |
| VerfasserIn |
J. G. Barr, J. D. Fuentes, M. S. DeLonge, T. L. O'Halloran, D. Barr, J. C. Zieman |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 1 ; Nr. 10, no. 1 (2013-01-25), S.501-511 |
| Datensatznummer |
250017485
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| Publikation (Nr.) |
 copernicus.org/bg-10-501-2013.pdf |
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| Zusammenfassung |
| Mangrove forests are ecosystems susceptible to changing water levels and
temperatures due to climate change as well as perturbations resulting from
tropical storms. Numerical models can be used to project mangrove forest
responses to regional and global environmental changes, and the reliability
of these models depends on surface energy balance closure. However, for
tidal ecosystems, the surface energy balance is complex because the energy
transport associated with tidal activity remains poorly understood. This
study aimed to quantify impacts of tidal flows on energy dynamics within a
mangrove ecosystem. To address the research objective, an intensive 10-day
study was conducted in a mangrove forest located along the Shark River in
the Everglades National Park, FL, USA. Forest–atmosphere turbulent exchanges
of energy were quantified with an eddy covariance system installed on a
30-m-tall flux tower. Energy transport associated with tidal activity was
calculated based on a coupled mass and energy balance approach. The mass
balance included tidal flows and accumulation of water on the forest floor.
The energy balance included temporal changes in enthalpy, resulting from
tidal flows and temperature changes in the water column. By serving as a net
sink or a source of available energy, flood waters reduced the impact of
high radiational loads on the mangrove forest. Also, the regression slope of
available energy versus sink terms increased from 0.730 to 0.754 and from
0.798 to 0.857, including total enthalpy change in the water column in the
surface energy balance for 30-min periods and daily daytime sums,
respectively. Results indicated that tidal inundation provides an important
mechanism for heat removal and that tidal exchange should be considered in
surface energy budgets of coastal ecosystems. Results also demonstrated the
importance of including tidal energy advection in mangrove biophysical
models that are used for predicting ecosystem response to changing climate
and regional freshwater management practices. |
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