 |
| Titel |
Energy Balance, Evapo-transpiration and Dew deposition in the Dead Sea Valley |
| VerfasserIn |
Jutta Metzger, Ulrich Corsmeier |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250126074
|
| Publikation (Nr.) |
 EGU/EGU2016-5752.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Dead Sea is a unique place on earth. It is a terminal hypersaline lake, located at the
lowest point on earth with a lake level of currently -429 m above mean sea level (amsl). It is
located in a transition zone of semiarid to arid climate conditions, which makes it highly
sensible to climate change (Alpert1997, Smiatek2011).
The Virtual Institute DEad SEa Research Venue (DESERVE) is an international project
funded by the German Helmholtz Association and was established to study coupled
atmospheric hydrological, and lithospheric processes in the changing environment of the
Dead Sea. At the moment the most prominent environmental change is the lake level decline
of approximately 1 m / year due to anthropogenic interferences (Gertman, 2002). This leads
to noticeable changes in the fractions of the existing terrestrial surfaces – water, bare soil and
vegetated areas - in the valley. Thus, the partitioning of the net radiation in the valley changes
as well. To thoroughly study the atmospheric and hydrological processes in the Dead Sea
valley, which are driven by the energy balance components, sound data of the energy fluxes of
the different surfaces are necessary. Before DESERVE no long-term monitoring network
simultaneously measuring the energy balance components of the different surfaces in
the Dead Sea valley was available. Therefore, three energy balance stations were
installed at three characteristic sites at the coast-line, over bare soil, and within
vegetation, measuring all energy balance components by using the eddy covariance
method.
The results show, that the partitioning of the energy into sensible and latent heat flux on a
diurnal scale is totally different at the three sites. This results in gradients between the sites,
which are e.g. responsible for the typical diurnal wind systems at the Dead Sea. Furthermore,
driving forces of evapo-transpiration at the sites were identified and a detailed analysis of
the daily evaporation and dew deposition rates for a whole annual cycle will be
presented.
Alpert, P., Shafir, H., & Issahary, D. (1997). Recent changes in the climate at the Dead
Sea–a preliminary study. Climatic Change, 37(3), 513-537.
Gertman, I., & Hecht, A. (2002). The Dead Sea hydrography from 1992 to 2000. Journal
of marine systems, 35(3), 169-181.
Smiatek, G., Kunstmann, H., & Heckl, A. (2011). High-resolution climate change
simulations for the Jordan River area. Journal of Geophysical Research: Atmospheres
(1984–2012), 116(D16). |
|
|
|
|
|
|