Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel
ABSTRACT A 22 m sediment core was collected from the unsaturated zone (USZ) in the dunes south of Ashdod, Israel, in a low rainfall year, following an even lower-rainfall year. The mineralogy of was quartz with some clay and carbonate. The local climate is semi-arid. The roots of the sparse vegetati...
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crcambridgeupr:10.1017/rdc.2018.54 2024-03-03T08:43:34+00:00 Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel Carmi, Israel Stiller, Mariana Kronfeld, Joel 2018 http://dx.doi.org/10.1017/rdc.2018.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822218000541 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Radiocarbon volume 60, issue 4, page 1259-1267 ISSN 0033-8222 1945-5755 General Earth and Planetary Sciences Archeology journal-article 2018 crcambridgeupr https://doi.org/10.1017/rdc.2018.54 2024-02-08T08:33:04Z ABSTRACT A 22 m sediment core was collected from the unsaturated zone (USZ) in the dunes south of Ashdod, Israel, in a low rainfall year, following an even lower-rainfall year. The mineralogy of was quartz with some clay and carbonate. The local climate is semi-arid. The roots of the sparse vegetation can reach ~8 m. The porosity was ~40–55%. The DIC ranged from 2 to 13 mmole C/L. Large variability is noted in the soil moisture, with a maximum at the high clay region at ~8 m. Oxygen isotopes enter the USZ with rain falling on the surface. There is 18 O enrichment in the top of the section due to evaporation during the summer. Below this depth δ 18 O values of ~ –5‰ prevail as in the local aquifer. CO 2 and the carbon isotopes enter the USZ laterally by exhalation from roots. The δ 13 C varies from –5‰ to –23‰, representing stages in carbon isotopic fractionation: CO 2gas becomes dissolved CO 2aqueous which then forms carbonic acid and HCO 3 – . The high δ 13 C, Δ 14 C, and DIC are found at the 8 m depth. These values along with high humidity are replicated at ~22m depth. They most probably represent recharge water from the previous rainy season at 8 m depth subsequently pushed down 12.8±0.8 m during the last winter. Article in Journal/Newspaper Carbonic acid Cambridge University Press Radiocarbon 60 4 1259 1267 |
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Open Polar |
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Cambridge University Press |
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language |
English |
topic |
General Earth and Planetary Sciences Archeology |
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General Earth and Planetary Sciences Archeology Carmi, Israel Stiller, Mariana Kronfeld, Joel Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
topic_facet |
General Earth and Planetary Sciences Archeology |
description |
ABSTRACT A 22 m sediment core was collected from the unsaturated zone (USZ) in the dunes south of Ashdod, Israel, in a low rainfall year, following an even lower-rainfall year. The mineralogy of was quartz with some clay and carbonate. The local climate is semi-arid. The roots of the sparse vegetation can reach ~8 m. The porosity was ~40–55%. The DIC ranged from 2 to 13 mmole C/L. Large variability is noted in the soil moisture, with a maximum at the high clay region at ~8 m. Oxygen isotopes enter the USZ with rain falling on the surface. There is 18 O enrichment in the top of the section due to evaporation during the summer. Below this depth δ 18 O values of ~ –5‰ prevail as in the local aquifer. CO 2 and the carbon isotopes enter the USZ laterally by exhalation from roots. The δ 13 C varies from –5‰ to –23‰, representing stages in carbon isotopic fractionation: CO 2gas becomes dissolved CO 2aqueous which then forms carbonic acid and HCO 3 – . The high δ 13 C, Δ 14 C, and DIC are found at the 8 m depth. These values along with high humidity are replicated at ~22m depth. They most probably represent recharge water from the previous rainy season at 8 m depth subsequently pushed down 12.8±0.8 m during the last winter. |
format |
Article in Journal/Newspaper |
author |
Carmi, Israel Stiller, Mariana Kronfeld, Joel |
author_facet |
Carmi, Israel Stiller, Mariana Kronfeld, Joel |
author_sort |
Carmi, Israel |
title |
Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
title_short |
Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
title_full |
Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
title_fullStr |
Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
title_full_unstemmed |
Dynamics of Water Soil Storage in the Unsaturated Zone of a Sand Dune in a Semi-Arid Region Traced by Humidity and Carbon Isotopes: The Case of Ashdod, Israel |
title_sort |
dynamics of water soil storage in the unsaturated zone of a sand dune in a semi-arid region traced by humidity and carbon isotopes: the case of ashdod, israel |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/rdc.2018.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822218000541 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Radiocarbon volume 60, issue 4, page 1259-1267 ISSN 0033-8222 1945-5755 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/rdc.2018.54 |
container_title |
Radiocarbon |
container_volume |
60 |
container_issue |
4 |
container_start_page |
1259 |
op_container_end_page |
1267 |
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1792499008581664768 |