<?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%">Khan, Alia L.</style></author><author><style face="normal" font="default" size="100%">Wagner, Sasha</style></author><author><style face="normal" font="default" size="100%">Jaffé, Rudolf</style></author><author><style face="normal" font="default" size="100%">Xian, Peng</style></author><author><style face="normal" font="default" size="100%">Williams, Mark</style></author><author><style face="normal" font="default" size="100%">Armstrong, Richard</style></author><author><style face="normal" font="default" size="100%">Diane M. McKnight</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dissolved black carbon in the global cryosphere: Concentrations and chemical signatures</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%">06/2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://doi.wiley.com/10.1002/2017GL073485</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">44</style></volume><pages><style face="normal" font="default" size="100%">6226-6234</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;Black carbon (BC) is derived from the incomplete combustion of biomass and fossil fuels and can enhance glacial recession when deposited on snow and ice surfaces. Here we explore the 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 of environmental conditions and the proximity to anthropogenic sources on the concentration and composition of dissolved black carbon (DBC), as measured by benzenepolycaroxylic acid (BPCA) markers, across snow, lakes, and streams from the global cryosphere. Data are presented from Antarctica, the Arctic, and high alpine regions of the Himalayas, Rockies, Andes, and Alps. DBC concentrations spanned from 0.62 &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTT182ff89e+03&amp;quot;;&quot;&gt;μ&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;g/L to 170 &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTT182ff89e+03&amp;quot;;&quot;&gt;μ&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;g/L. The median and (2.5, 97.5) quantiles in the pristine samples were 1.8 &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTT182ff89e+03&amp;quot;;&quot;&gt;μ&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;g/L (0.62, 12), and nonpristine samples were 21 &lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: &amp;quot;AdvTT182ff89e+03&amp;quot;;&quot;&gt;μ&lt;/span&gt;&lt;span style=&quot;font-size: 9pt; font-family: AdvTTe45e47d2;&quot;&gt;g/L (1.6, 170). DBC is susceptible to photodegradation when exposed to solar radiation. This process leads to a less condensed BPCA signature. In general, DBC across the data set was composed of less polycondensed DBC. However, DBC from the Greenland Ice Sheet (GRIS) had a highly condensed BPCA molecular signature. This could be due to recent deposition of BC from Canadian wild&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;res. Variation in DBC appears to be driven by a combination of photochemical processing and the source combustion conditions under which the DBC was formed. Overall, DBC was found to persist across the global cryosphere in both pristine and nonpristine snow and surface waters. The high concentration of DBC measured in supraglacial melt on the GRIS suggests that DBC can be mobilized across ice surfaces. This is 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 because these processes may jointly exacerbate surface albedo reduction in the cryosphere.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">12</style></issue></record></records></xml>