<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">Bullen, T</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Ca isotopic geochemistry of an Antarctic aquatic system</style></title><secondary-title><style face="normal" font="default" size="100%">Geophysical Research Letters</style></secondary-title><short-title><style face="normal" font="default" size="100%">Geophys. Res. Lett.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">01/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1002/2016GL071169/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">44</style></volume><pages><style face="normal" font="default" size="100%">882 - 891</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;The McMurdo Dry Valleys, Antarctica, are a polar desert ecosystem. The hydrologic system of the dry valleys is linked to climate with ephemeral streams that &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fl&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;ow from glacial melt during the austral summer. Past climate variations have strongly in&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fl&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;uenced the closed-basin, chemically strati&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fi&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;ed lakes on the valley &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fl&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;oor. Results of previous work point to important roles for both in-stream processes (e.g., mineral weathering, precipitation and dissolution of salts) and in-lake processes (e.g., mixing with paleo-seawater and calcite precipitation) in determining the geochemistry of these lakes. These processes have a signi&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fi&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;cant in&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTTe45e47d2+fb&amp;quot;;&quot;&gt;fl&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;uence on calcium (Ca) biogeochemistry in this aquatic ecosystem, and thus variations in Ca stable isotope compositions of the waters can aid in validating the importance of these processes. We have analyzed the Ca stable isotope compositions of streams and lakes in the McMurdo Dry Valleys. The results validate the important roles of weathering of aluminosilicate minerals and/or CaCO&lt;/span&gt;&lt;span style=&quot;font-size: 7pt; font-family: AdvTTe45e47d2; vertical-align: -2pt;&quot;&gt;3 &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;in the hyporheic zone of the streams, and mixing of lake surface water with paleo-seawater and precipitation of Ca-salts during cryo-concentration events to form the deep lake waters. The lakes in the McMurdo Dry Valleys evolved following different geochemical pathways, evidenced by their unique, nonsystematic Ca isotope signatures.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">W. Berry Lyons</style></author><author><style face="normal" font="default" size="100%">C. A. Nezat</style></author><author><style face="normal" font="default" size="100%">Benson, L</style></author><author><style face="normal" font="default" size="100%">Bullen, T</style></author><author><style face="normal" font="default" size="100%">Graham, E</style></author><author><style face="normal" font="default" size="100%">Kidd, J</style></author><author><style face="normal" font="default" size="100%">Kathleen A. Welch</style></author><author><style face="normal" font="default" size="100%">Thomas, J</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Strontium isotopic signatures of the streams and lakes of Taylor Valley, southern Victoria Land, Antarctica: chemical weathering in a polar climate</style></title><secondary-title><style face="normal" font="default" size="100%">Aquatic Geochemistry</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2003</style></year></dates><volume><style face="normal" font="default" size="100%">8</style></volume><pages><style face="normal" font="default" size="100%">875-895</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER49869</style></accession-num></record></records></xml>