The Multinational Bathymetric Survey: Northern Gulf of 'Aqaba/Elat Poster

Sade, Aharon (Ronnie); Hall, John K.; Tibor, Gideon; Niemi, Tina M.; Ben‐Avraham, Zvi; Al-Zoubi, A.; Hartman, Gal; Akawwi, Emad; Abueladas, A.; Amit, Gideon

doi:10.1560/ijes.57.2.139

Cited by 19 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the apparent loss of salt from the epilimnion without accounting for DD delivery was calculated in the following steps: We calculated the total salt mass within the epilimnion at the beginning of the stratification period (end of March). The volume of the epilimnion (mean depth ∼22 m) were based on bathymetry data (Sade et al ). Salinity and density were based on our measurements. Water loss from the epilimnion was calculated from measured lake level reduction.…”

Section: Resultsmentioning

confidence: 99%

“…On the Ein Gedi coast in the spring, for example, we observed a complete thermal dissolution of the ∼5 cm thick salt layer (∼110 kg salt m −2 ) that had accumulated on the lake floor during the winter months. The area underlying the epilimnion occupies ∼12% of the lake's total surface (Sade et al ), which would result in a density change of

\sim 0.12 \times \frac{110 {k g}_{s} m^{- 2}}{20 m}

for the 20 m deep epilimnion. Thus we estimate that the contribution of the thermal spring dissolution in the epilimnion could have increased salinity by ∼0.7 kg m −3 .…”

Section: Resultsmentioning

confidence: 99%

“…EG—Ein Gedi observation site. Bathymetry (Sade et al ) with 50 m elevation contour (below sea level), bold contour is the coastline at −428 m.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermohaline stratification and double diffusion diapycnal fluxes in the hypersaline Dead Sea

Arnon

Selker

Lensky

2016

Limnology & Oceanography

View full text Add to dashboard Cite

The Dead Sea is a hypersaline terminal lake, experiencing negative water balance, increasing salinity, and NaCl (halite) crystallization. We observed atypical evolution of the thermohaline stratification in comparison to most lakes due to the role of salt crystallization and diapycnal fluxes across lake layers. We characterized the dynamics of the thermohaline properties of the lake strata through high‐resolution continuous measurements of temperature profiles, novel water sampling methods, and observation of vertical profiles of salt crystallization. The diapycnal fluxes across the metalimnion were explained by Double Diffusion (DD) salt fingering driven by instability between warmer saltier water above cooler less salty water. The DD flux is associated with: (1) sharpening of the metalimnion from a 20 m wide transition in early summer, to staircase, ultimately merging to a single sharp sub‐meter step, (2) salinity decline from the epilimnion starting from mid‐summer synchronous with increasing salinity and temperature of the hypolimnion, and (3) active halite crystallization in the hypolimnion. We hypnotize that the salt fingering mechanism in saturated brines reveals a unique asymmetry; i.e., the descending cooling fingers become supersaturated and crystallize halite, whereas the ascending warming fingers becomes undersaturated. The DD flux in the Dead Sea is shown to be fundamental in the dynamics of stratification, providing a framework for general understanding DD flux in hypersaline environments. The finding that the epilimnion experiences seasonal halite undersaturation whereas the hypolimnion continuously precipitates salt by DD flux, has wide implications on the understanding of the dynamics of deposition of evaporitic rocks.

show abstract

Section: Resultsmentioning

confidence: 99%

\sim 0.12 \times \frac{110 {k g}_{s} m^{- 2}}{20 m}

for the 20 m deep epilimnion. Thus we estimate that the contribution of the thermal spring dissolution in the epilimnion could have increased salinity by ∼0.7 kg m −3 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Thermohaline stratification and double diffusion diapycnal fluxes in the hypersaline Dead Sea

Arnon

Selker

Lensky

2016

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…The measured offsets are shown in Table . The shaded relief seafloor map is generated from multibeam bathymetric data [ Sade et al ., ].…”

Section: Fault Geometrymentioning

confidence: 99%

“…We identify and measure several different piercing lines across the Evrona Fault. An E‐W linear segment of the R5 fossil fringing reef in ~60 m to ~70 m water depth (Figure ) is clearly visible on the multibeam bathymetric data [ Sade et al ., ; Tibor et al ., ]. The R5 reef is sinistrally offset by 28 ± 6 m across the Evrona Fault in agreement with the estimate of Makovsky et al .…”

Section: Fault Geometrymentioning

confidence: 99%

Quaternary tectonic evolution of the Northern Gulf of Elat/Aqaba along the Dead Sea Transform

et al. 2014

Self Cite

View full text Add to dashboard Cite

The northern Gulf of Elat/Aqaba is located in the transition between the deep marine basins of the gulf and the shallow onland basins of the Arava Valley. Interpretation of 500 km of high-resolution seismic reflection data collected across the northern shelf reveals the tectonic structure and evolution of this transition. Six NNE-trending faults and one E-W trending transverse fault are mapped. Slip rates are calculated based on measured offsets and age determination based on a radiocarbon-calibrated sedimentation rate and a Quaternary age model. The most active fault is the Evrona Fault that absorbs most of the left lateral slip within the basin with an average sinistral slip rate of 0.7 ± 0.3 mm/yr through the Late Pleistocene and 2.3-3.4 mm/yr during the Holocene. Two intrabasin faults east of the Evrona Fault that have been inactive for the last several tens of thousands of years were mapped, and motion from these faults has likely transferred to the Evrona Fault. The basin is flanked on the west by the Elat Fault and on the east by the Aqaba Fault. Both faults are marked by large bathymetric escarpments. Based on displaced seismic reflectors, we calculate a Holocene vertical slip rate of 1.0 ± 0.2 and 0.4 ± 0.1 mm/yr for the Elat and Aqaba Faults, respectively. The geometry, slip rates, and slip history of the northern Gulf of Elat/Aqaba faults show that during the Late Pleistocene several intrabasin faults became dominant across the basin but that during the Holocene the Evrona Fault accommodates most of the strike slip.

show abstract

Active faults' geometry in the Gulf of Aqaba, southern Dead Sea fault, illuminated by multi beam bathymetric data

Ribot

Klinger

Jónsson

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

The Multinational Bathymetric Survey: Northern Gulf of 'Aqaba/Elat Poster

Cited by 19 publications

References 0 publications

Thermohaline stratification and double diffusion diapycnal fluxes in the hypersaline Dead Sea

Thermohaline stratification and double diffusion diapycnal fluxes in the hypersaline Dead Sea

Quaternary tectonic evolution of the Northern Gulf of Elat/Aqaba along the Dead Sea Transform

Active faults' geometry in the Gulf of Aqaba, southern Dead Sea fault, illuminated by multi beam bathymetric data

Contact Info

Product

Resources

About