caa a22 4500 445815507 CHVBK 20180317145227.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10040-010-0696-8 doi (NATIONALLICENCE)springer-10.1007/s10040-010-0696-8 Manning Andrew US Geological Survey, P.O. Box 25046, Mail Stop 973, 80225, Denver, CO, USA aut Mountain-block recharge, present and past, in the eastern Española Basin, New Mexico, USA [Elektronische Daten] [Andrew Manning] Recharge actuelle et passée d'un massif montagneux, partie orientale du bassin Española, New Mexico, USA Recarga en un bloque montañoso, presente y pasado en la Cuenca Española oriental, New Mexico, EEUU Recarga actual e histórica em blocos montanhosos da Bacia Espanhola oriental, Novo México, EUA Noble gas recharge temperatures (NGTs) and radiocarbon ages were determined for 43 groundwater samples collected in the eastern Española Basin, New Mexico (USA), to identify mountain-block recharge in waters <10 thousand years (ka) old and to evaluate possible changes in mountain-block recharge over the past ∼35ka. For Holocene samples from the southeastern area, NGTs are dominantly 2-4° cooler than the measured water-table temperature near the mountain front. Computed minimum mountain-block recharge fractions are dominantly 0.2-0.5, consistent with previous large mountain-block recharge estimates. NGTs do not display the distinct low during the last glacial maximum observed in other paleorecharge studies; samples recharged 15-25ka ago are on average only 1.3° cooler than Holocene samples. Instead, samples with the coldest NGTs were recharged 25-35ka ago. A proposed explanation is that higher precipitation rates during the last glacial maximum resulted in a lower mean recharge elevation for the basin, essentially buffering the effect of the lower mean annual air temperature and producing NGTs similar to the Holocene. In the period preceding the last glacial maximum, precipitation rates more like today's resulted in Holocene-like mountain-block recharge fractions, producing a mean NGT ∼5° cooler than the Holocene, as expected. Springer-Verlag (outside the USA), 2010 Groundwater recharge nationallicence Groundwater age nationallicence Noble gases nationallicence Recharge temperature nationallicence USA nationallicence Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 379-397 1431-2174 19:2<379 2011 19 10040 https://doi.org/10.1007/s10040-010-0696-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-010-0696-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Manning Andrew US Geological Survey, P.O. Box 25046, Mail Stop 973, 80225, Denver, CO, USA aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 379-397 1431-2174 19:2<379 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer