气候变化领域集成服务门户(CCPortal): Deep Submarine Groundwater Discharge—Evidence From Achziv Submarine Canyon at the Exposure of the Judea Group Confined Aquifer, Eastern Mediterranean

CCPortal

DOI	10.1029/2019JC015435
	Deep Submarine Groundwater Discharge—Evidence From Achziv Submarine Canyon at the Exposure of the Judea Group Confined Aquifer, Eastern Mediterranean
	Paldor A.; Katz O.; Aharonov E.; Weinstein Y.; Roditi-Elasar M.; Lazar A.; Lazar B.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	Deep submarine groundwater discharge (DSGD) of fresh-brackish water was suggested to occur globally, yet its driving mechanism is not well constrained. Specifically, it is unclear whether the phenomenon may represent a steady-state condition of a hydrological system, in which the terrestrial recharge area is hydraulically connected with the submarine discharge area (by a confined aquifer, for example). Recently, our hydrogeological modeling suggested that such a system exists in northern Israel. The model predicted the location of a brackish water seepage within the Achziv Submarine Canyon, ~10 km offshore, where the Cretaceous Judea Group confined aquifer is carved by the canyon. The present work is a field study that attempts to identify these brackish seeps in the water column of the canyon at the aquifer exposure. The field observations include salinity and temperature profiling of the water column along the canyon during three cruises and 224Ra measurements of water samples from the canyon. The results point to a significant near-bottom low-salinity and low-temperature anomaly right where the aquifer submarine outcrop is mapped that coincide with a high 224Ra activity anomaly. Such near-bottom anomalies are absent in an adjacent submarine canyon, in which the confined aquifer is not exposed. The anomalies in the water column of the Achziv Submarine Canyon corroborate the results of the hydrogeological modeling that predicted brackish DSGD from the sea bottom at the aquifer outcrop. The possibility of DSGD in specific geo-hydrological settings is relevant for various biological, geochemical, hydrological, and geotechnical studies of the marginal ocean. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187031
作者单位	Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel; Geological Survey of Israel, Jerusalem, Israel; Now at the Department of Geological Sciences, the University of Delaware, Newark, DE, United States; Department of Geography and Environment, Bar-Ilan University, Ramat Gan, Israel; Israel Marine Mammal Research and Assistance Center, The Leon Recanati Institute for Maritime Studies and Department for Maritime Civilizations, The University of Haifa, Haifa, Israel; National Institute of Oceanography, Israel Oceanographic and Limnological Research, Haifa, Israel
推荐引用方式 GB/T 7714	Paldor A.,Katz O.,Aharonov E.,等. Deep Submarine Groundwater Discharge—Evidence From Achziv Submarine Canyon at the Exposure of the Judea Group Confined Aquifer, Eastern Mediterranean[J],2020,125(1).
APA	Paldor A..,Katz O..,Aharonov E..,Weinstein Y..,Roditi-Elasar M..,...&Lazar B..(2020).Deep Submarine Groundwater Discharge—Evidence From Achziv Submarine Canyon at the Exposure of the Judea Group Confined Aquifer, Eastern Mediterranean.Journal of Geophysical Research: Oceans,125(1).
MLA	Paldor A.,et al."Deep Submarine Groundwater Discharge—Evidence From Achziv Submarine Canyon at the Exposure of the Judea Group Confined Aquifer, Eastern Mediterranean".Journal of Geophysical Research: Oceans 125.1(2020).