Yoseph Yechieli
Dados Biográficos
| ID | 5598606 |
|---|---|
| NOME | Yoseph Yechieli |
| PRENOMES | Yoseph |
| SOBRENOME | Yechieli |
| ASSINATURA | YECHIELI Y |
| AFILIAÇÕES | Weizmann Institute of Science |
| VERIFICADO | Não |
| TOTAL DE OBRAS | 13 |
| TOTAL DE CITAÇÕES | 17 |
| TOTAL COMO AUTOR | 12 |
| TOTAL COMO EDITOR | 1 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1992 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2021 |
| ÍNDICE H | 3 |
The Many Facets of Israel's Hydrogeology
Radiocarbon Reservoir Ages in the Holocene Dead Sea
The sources and fate of radiocarbon ( 14 C) in the Dead Sea hypersaline solution are evaluated with 14 C measurements in organic debris and primary aragonite collected from exposures of the Holocene Ze’elim Formation. The reservoir age (RA) is defined as the difference between the radiocarbon age of the aragonite at time of its precipitation (representing lakeʼs dissolved inorganic carbon [DIC]) and the age of contemporaneous organic debris (repr…
Field Degassing as a New Sampling Method for 14 C Analyses in Old Groundwater
Radiocarbon ( 14 C) activity in groundwater can be used to determine subsurface residence time up to ∼40 kyr, providing crucial information on dynamic properties of groundwater and on paleoclimate. However, commonly applied sampling methods for dissolved inorganic carbon (DIC- 14 C) are prone to low level of modern atmospheric contamination, resulting in underestimation of groundwater ages that cluster around 30–40 kyr. We extract CO 2 gas from g…
Evaluating ancient coastal wells as sea‐level indicators from the coast of Israel
This paper re‐evaluates previous records and adds new data to the relative sea level (RSL; namely the sea level related to the level of the national terrestrial datum) reconstruction in Israel from the last 2400 years based on ancient coastal water wells. Different methods for obtaining the most accurate modern offset between coastal groundwater level and mean sea level are also tested, since this is a crucial component for using wells as reliabl…
Carbon Isotope Exchange During Calcite Interaction With Brine
Due to its possible role in solid/water carbon isotope exchange, the effect of salinity on radiocarbon dating of groundwater was examined by batch interaction of alluvial sediment and calcite powder with freshwater (Cl – = 100 mg L –1 ) and Dead Sea (DS) brine (Cl – = 225 g L –1 ). These 2 water types were spiked with H 13 CO 3 – tracer and kept under constant agitation for about 1 yr. Several bottles were respiked twice with the tracer. The upta…
Radiocarbon Variability in Groundwater in an Extremely Arid Zone—The Arava Valley, Israel
Radiocarbon values of groundwater in main aquifers of the extremely arid Negev Desert and the Arava Valley, southern Israel, are used for studying the underground flow regime, particularly the complex connections between different aquifers and mixing of water bodies. The study shows that 14 C can serve as a hydrological tracer in arid environments and that groundwater dating may be possible (although not very accurate) even in this extremely arid…
The relationship between current and paleo groundwater base-levels
Characterization and Dating of Saline Groundwater in the Dead Sea Area
This work presents an attempt to date brines and determine flow rates of hypersaline groundwater in the extremely dynamic system of the Dead Sea (DS), whose level has dropped in the last 30 yr by ∼20 m. The processes that affect the carbon species and isotopes of the groundwater in the DS area were quantified in order to estimate their flow rate based on radiocarbon and tritium methods. In contrast to the conservative behavior of most ions in the…
Controls on the Radiocarbon Reservoir Ages in the Modern Dead Sea Drainage System and in the Last Glacial Lake Lisan
Carbon isotopic and chemical compositions of freshwaters feeding the Dead Sea and the Sea of Galilee (i.e. perennial streams and floods along their stream profiles) were used to constrain the factors that dictate the reservoir ages (RA) of these lakes and the last glacial Lake Lisan. Runoff waters are characterized by high Ca 2+ , Mg 2+ , alkalinity, and radiocarbon contents (67–108 pMC), suggesting a major role for 14 C atmospheric exchange reac…
A Direct Estimate of the Initial Concentration of 14 C in the Mountain Aquifer of Israel
Five radiocarbon analyses were performed on 5 different sources within Soreq Cave, which was used as a model for the Judea Group Aquifer of Israel ( pMC q0 ). The transit time of rainwater through the roof of the cave to sources within it had been determined with tritium. From this information, the year of deposition of rain on the roof of the cave, which later appeared in one of the sources, was estimated and the atmospheric 14 C concentration a…
Spatial Variations of Radiocarbon in the Coastal Aquifer of Israel—Indicators of Open and Closed Systems
The spatial variation in radiocarbon concentration was studied in the Coastal Aquifer of Israel. Lower concentrations were found in the western section of the aquifer (55–70 pMC) as compared to the eastern section (80–100 pMC). Since no correlation was found between the tritium and radiocarbon values, these variations could not simply be explained by a difference in ages, or by a difference in the degree of old calcite dissolution as similar δ 13…
Late Quaternary Geological History of the Dead Sea Area, Israel
A 34.5 m borehole, which was drilled near the Dead Sea coast (altitude -394 m) in the southern part of the fan delta of Wadi Zeelim, reveals the geological history of that area from the latest Pleistocene to present. The depositional time frame is based on six 14 C dates and two U-Th dates. An erosional (or nondepositional) period is implied by the hiatus between 21,100 yr B.P. (U-Th age, depth 33 m) and 11,315 yr B.P. ( 14 C age, depth 32 m). A …
Reevaluation of the Lake-Sediment Chronology in the Dead Sea Basin, Israel, Based on New 230 Th/U dates
The Dead Sea is surrounded by chemical and detrital sediments that were deposited in its larger precursor lakes, Lake Samra and Lake Lisan. The sedimentary history of these lakes was recon-structed by means of 230 Th/ 234 U ages of 30 samples, mostly of argonite laminae, from 8 columnar sections up to 110 km apart. The general validity of the ages was demonstrated by subjecting them to tests of internal isotopic consistency, agreement with strati…
Controls on the Radiocarbon Reservoir Ages in the Modern Dead Sea Drainage System and in the Last Glacial Lake Lisan
Carbon isotopic and chemical compositions of freshwaters feeding the Dead Sea and the Sea of Galilee (i.e. perennial streams and floods along their stream profiles) were used to constrain the factors that dictate the reservoir ages (RA) of these lakes and the last glacial Lake Lisan. Runoff waters are characterized by high Ca 2+ , Mg 2+ , alkalinity, and radiocarbon contents (67–108 pMC), suggesting a major role for 14 C atmospheric exchange reac…
Radiocarbon Variability in Groundwater in an Extremely Arid Zone—The Arava Valley, Israel
Radiocarbon values of groundwater in main aquifers of the extremely arid Negev Desert and the Arava Valley, southern Israel, are used for studying the underground flow regime, particularly the complex connections between different aquifers and mixing of water bodies. The study shows that 14 C can serve as a hydrological tracer in arid environments and that groundwater dating may be possible (although not very accurate) even in this extremely arid…
Characterization and Dating of Saline Groundwater in the Dead Sea Area
This work presents an attempt to date brines and determine flow rates of hypersaline groundwater in the extremely dynamic system of the Dead Sea (DS), whose level has dropped in the last 30 yr by ∼20 m. The processes that affect the carbon species and isotopes of the groundwater in the DS area were quantified in order to estimate their flow rate based on radiocarbon and tritium methods. In contrast to the conservative behavior of most ions in the…
Evaluating ancient coastal wells as sea‐level indicators from the coast of Israel
This paper re‐evaluates previous records and adds new data to the relative sea level (RSL; namely the sea level related to the level of the national terrestrial datum) reconstruction in Israel from the last 2400 years based on ancient coastal water wells. Different methods for obtaining the most accurate modern offset between coastal groundwater level and mean sea level are also tested, since this is a crucial component for using wells as reliabl…
Spatial Variations of Radiocarbon in the Coastal Aquifer of Israel—Indicators of Open and Closed Systems
The spatial variation in radiocarbon concentration was studied in the Coastal Aquifer of Israel. Lower concentrations were found in the western section of the aquifer (55–70 pMC) as compared to the eastern section (80–100 pMC). Since no correlation was found between the tritium and radiocarbon values, these variations could not simply be explained by a difference in ages, or by a difference in the degree of old calcite dissolution as similar δ 13…
Field Degassing as a New Sampling Method for 14 C Analyses in Old Groundwater
Radiocarbon ( 14 C) activity in groundwater can be used to determine subsurface residence time up to ∼40 kyr, providing crucial information on dynamic properties of groundwater and on paleoclimate. However, commonly applied sampling methods for dissolved inorganic carbon (DIC- 14 C) are prone to low level of modern atmospheric contamination, resulting in underestimation of groundwater ages that cluster around 30–40 kyr. We extract CO 2 gas from g…
A Direct Estimate of the Initial Concentration of 14 C in the Mountain Aquifer of Israel
Five radiocarbon analyses were performed on 5 different sources within Soreq Cave, which was used as a model for the Judea Group Aquifer of Israel ( pMC q0 ). The transit time of rainwater through the roof of the cave to sources within it had been determined with tritium. From this information, the year of deposition of rain on the roof of the cave, which later appeared in one of the sources, was estimated and the atmospheric 14 C concentration a…
Reevaluation of the Lake-Sediment Chronology in the Dead Sea Basin, Israel, Based on New 230 Th/U dates
The Dead Sea is surrounded by chemical and detrital sediments that were deposited in its larger precursor lakes, Lake Samra and Lake Lisan. The sedimentary history of these lakes was recon-structed by means of 230 Th/ 234 U ages of 30 samples, mostly of argonite laminae, from 8 columnar sections up to 110 km apart. The general validity of the ages was demonstrated by subjecting them to tests of internal isotopic consistency, agreement with strati…
Late Quaternary Geological History of the Dead Sea Area, Israel
A 34.5 m borehole, which was drilled near the Dead Sea coast (altitude -394 m) in the southern part of the fan delta of Wadi Zeelim, reveals the geological history of that area from the latest Pleistocene to present. The depositional time frame is based on six 14 C dates and two U-Th dates. An erosional (or nondepositional) period is implied by the hiatus between 21,100 yr B.P. (U-Th age, depth 33 m) and 11,315 yr B.P. ( 14 C age, depth 32 m). A …
Spatial Variations of Radiocarbon in the Coastal Aquifer of Israel—Indicators of Open and Closed Systems
The spatial variation in radiocarbon concentration was studied in the Coastal Aquifer of Israel. Lower concentrations were found in the western section of the aquifer (55–70 pMC) as compared to the eastern section (80–100 pMC). Since no correlation was found between the tritium and radiocarbon values, these variations could not simply be explained by a difference in ages, or by a difference in the degree of old calcite dissolution as similar δ 13…
A Direct Estimate of the Initial Concentration of 14 C in the Mountain Aquifer of Israel
Five radiocarbon analyses were performed on 5 different sources within Soreq Cave, which was used as a model for the Judea Group Aquifer of Israel ( pMC q0 ). The transit time of rainwater through the roof of the cave to sources within it had been determined with tritium. From this information, the year of deposition of rain on the roof of the cave, which later appeared in one of the sources, was estimated and the atmospheric 14 C concentration a…
Controls on the Radiocarbon Reservoir Ages in the Modern Dead Sea Drainage System and in the Last Glacial Lake Lisan
Carbon isotopic and chemical compositions of freshwaters feeding the Dead Sea and the Sea of Galilee (i.e. perennial streams and floods along their stream profiles) were used to constrain the factors that dictate the reservoir ages (RA) of these lakes and the last glacial Lake Lisan. Runoff waters are characterized by high Ca 2+ , Mg 2+ , alkalinity, and radiocarbon contents (67–108 pMC), suggesting a major role for 14 C atmospheric exchange reac…
Characterization and Dating of Saline Groundwater in the Dead Sea Area
This work presents an attempt to date brines and determine flow rates of hypersaline groundwater in the extremely dynamic system of the Dead Sea (DS), whose level has dropped in the last 30 yr by ∼20 m. The processes that affect the carbon species and isotopes of the groundwater in the DS area were quantified in order to estimate their flow rate based on radiocarbon and tritium methods. In contrast to the conservative behavior of most ions in the…
The relationship between current and paleo groundwater base-levels
Carbon Isotope Exchange During Calcite Interaction With Brine
Due to its possible role in solid/water carbon isotope exchange, the effect of salinity on radiocarbon dating of groundwater was examined by batch interaction of alluvial sediment and calcite powder with freshwater (Cl – = 100 mg L –1 ) and Dead Sea (DS) brine (Cl – = 225 g L –1 ). These 2 water types were spiked with H 13 CO 3 – tracer and kept under constant agitation for about 1 yr. Several bottles were respiked twice with the tracer. The upta…
Radiocarbon Variability in Groundwater in an Extremely Arid Zone—The Arava Valley, Israel
Radiocarbon values of groundwater in main aquifers of the extremely arid Negev Desert and the Arava Valley, southern Israel, are used for studying the underground flow regime, particularly the complex connections between different aquifers and mixing of water bodies. The study shows that 14 C can serve as a hydrological tracer in arid environments and that groundwater dating may be possible (although not very accurate) even in this extremely arid…
Evaluating ancient coastal wells as sea‐level indicators from the coast of Israel
This paper re‐evaluates previous records and adds new data to the relative sea level (RSL; namely the sea level related to the level of the national terrestrial datum) reconstruction in Israel from the last 2400 years based on ancient coastal water wells. Different methods for obtaining the most accurate modern offset between coastal groundwater level and mean sea level are also tested, since this is a crucial component for using wells as reliabl…
Field Degassing as a New Sampling Method for 14 C Analyses in Old Groundwater
Radiocarbon ( 14 C) activity in groundwater can be used to determine subsurface residence time up to ∼40 kyr, providing crucial information on dynamic properties of groundwater and on paleoclimate. However, commonly applied sampling methods for dissolved inorganic carbon (DIC- 14 C) are prone to low level of modern atmospheric contamination, resulting in underestimation of groundwater ages that cluster around 30–40 kyr. We extract CO 2 gas from g…
Radiocarbon Reservoir Ages in the Holocene Dead Sea
The sources and fate of radiocarbon ( 14 C) in the Dead Sea hypersaline solution are evaluated with 14 C measurements in organic debris and primary aragonite collected from exposures of the Holocene Ze’elim Formation. The reservoir age (RA) is defined as the difference between the radiocarbon age of the aragonite at time of its precipitation (representing lakeʼs dissolved inorganic carbon [DIC]) and the age of contemporaneous organic debris (repr…
The Many Facets of Israel's Hydrogeology
Geology (11 obras) · Geology and Paleoclimatology Research (9 obras) · Groundwater (8 obras) · Radiocarbon dating (8 obras) · Aquifer (7 obras) · Geochemistry (7 obras) · Groundwater and Isotope Geochemistry (7 obras) · Paleontology (7 obras) · Oceanography (6 obras) · Marine and environmental studies (5 obras)