@article {2704,
	title = {Arsenic contamination of Bangladesh aquifers exacerbated by clay layers},
	journal = {Nature Communications},
	volume = {11},
	year = {2020},
	month = {Jan-12-2020},
	abstract = {Confining clay layers typically protect groundwater aquifers against downward intrusion of contaminants. In the context of groundwater arsenic in Bangladesh, we challenge this notion here by showing that organic carbon drawn from a clay layer into a low-arsenic pre-Holocene (>12 kyr-old) aquifer promotes the reductive dissolution of iron oxides and the release of arsenic. The finding explains a steady rise in arsenic concentrations in a pre-Holocene aquifer below such a clay layer and the repeated failure of a structurally sound community well. Tritium measurements indicate that groundwater from the affected depth interval (40{\textendash}50 m) was recharged >60 years ago. Deeper (55{\textendash}65 m) groundwater in the same pre-Holocene aquifer was recharged only 10{\textendash}50 years ago but is still low in arsenic. Proximity to a confining clay layer that expels organic carbon as an indirect response to groundwater pumping, rather than directly accelerated recharge, caused arsenic contamination of this pre-Holocene aquifer.},
	doi = {10.1038/s41467-020-16104-z},
	url = {https://www.nature.com/articles/s41467-020-16104-z},
	author = {Mihajlov, Ivan and Mozumder, M. Rajib H. and Bostick, Benjam{\'\i}n C. and Stute, Martin and Mailloux, Brian J. and Knappett, Peter S. K. and Choudhury, Imtiaz and Ahmed, Kazi Matin and Schlosser, Peter and van Geen, Alexander}
}
@article {116,
	title = {Environmental isotopes and noble gases in the deep aquifer system of Kazan Trona Ore Field, Ankara, central Turkey and links to paleoclimate},
	journal = {Quaternary Research},
	volume = {79},
	year = {2013},
	note = {id: 2269},
	pages = {292-303},
	abstract = {Environmental isotopes and noble gases in groundwater samples from the Kazan Trona Ore Field are studied to establish the temperature change between the Holocene and the late Pleistocene. Noble gas temperatures (NGTs) presented in this study add an important facet to the global paleotemperature map in the region between Europe and North Africa. The groundwater system under investigation consists of three different aquifers named shallow, middle and deep in which δ18O and δ2H vary from - 8.10{\textperthousand} to - 12.80{\textperthousand} and from - 60.89{\textperthousand} to - 92.60{\textperthousand} VSMOW, respectively. The average isotopic depletion between unconfined and confined parts of the system is - 2.5{\textperthousand} in δ18O and - 20{\textperthousand} in δ2H. It is not possible to explain this depletion solely with the elevation effect. Recharge temperatures derived from dissolved atmospheric noble gases reflect the current average yearly ground temperatures (13{\textdegree}C) for samples collected near the recharge area but are 3 to 8{\textdegree}C lower than today{\textquoteright}s temperatures in the deep aquifer system. Low 14C activities and high He excesses in the confined parts of the aquifer system suggest that the water in the deep aquifer was recharged during the last Pleistocene under considerably cooler climatic conditions.},
	issn = {0033-5894},
	doi = {10.1016/j.yqres.2012.12.001},
	url = {http://www.sciencedirect.com/science/article/pii/S0033589412001561},
	author = {Arslan, Sebnem and Yazicigil, Hasan and Stute, Martin and Schlosser, Peter}
}
@article {2289,
	title = {The first trans-Arctic 14C section: comparison of the mean ages of the deep waters in the Eurasian and Canadian basins fo the Arctic Ocean},
	journal = {Nuclear Instruments and Methods in Physics Research},
	volume = {123},
	year = {1997},
	note = {id: 67},
	month = {1997},
	author = {Schlosser, Peter and Kromer, Bernd and Ekwurzel, Brenda and Bonisch, Gerhard and McNichol, Ann and Schneider, Robert and von Reden, Karl and Ostlund, H. G. and Swift, J. H.}
}
