{"id":19501,"date":"2016-06-20T18:16:18","date_gmt":"2016-06-20T18:16:18","guid":{"rendered":"https:\/\/usoceandiscovery.org\/?page_id=19501"},"modified":"2022-08-10T07:29:52","modified_gmt":"2022-08-10T07:29:52","slug":"2008-2009-schlanger-fellow-andrea-erhardt","status":"publish","type":"page","link":"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/","title":{"rendered":"2008-2009 Schlanger Fellow &#8211; Andrea Erhardt"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:var(--awb-color3);border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1456px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_3 1_3 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 2% 0px 0px 0px;\"><div style=\"text-align:center;\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><a class=\"fusion-no-lightbox\" href=\"\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger.jpg\" target=\"_self\" aria-label=\"Erhardt_Schlanger\"><img decoding=\"async\" width=\"250\" height=\"300\" src=\"https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger.jpg\" alt class=\"img-responsive wp-image-19145\" srcset=\"https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger-125x150.jpg 125w, https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger-141x169.jpg 141w, https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger-165x198.jpg 165w, https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger-217x260.jpg 217w, https:\/\/usoceandiscovery.org\/wp-content\/uploads\/2016\/06\/Erhardt_Schlanger.jpg 250w\" sizes=\"(max-width: 250px) 100vw, 250px\" \/><\/a><\/span><\/div><style type=\"text\/css\">@media only screen and (max-width:1024px) {.fusion-title.fusion-title-1{margin-top:10px!important; margin-right:0px!important;margin-bottom:15px!important;margin-left:0px!important;}}@media only screen and (max-width:640px) {.fusion-title.fusion-title-1{margin-top:10px!important; margin-right:0px!important;margin-bottom:10px!important; margin-left:0px!important;}}<\/style><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-two\" style=\"margin-top:10px;margin-right:0px;margin-bottom:15px;margin-left:0px;\"><h2 class=\"title-heading-center fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:28;line-height:var(--awb-typography1-line-height);\">ANDREA ERHARDT<\/h2><\/div><div class=\"fusion-text fusion-text-1\" style=\"text-align:center;margin-top:0%;\"><p><strong>Stanford University<\/strong><br \/>\n<strong><em>Using Molybdenum Isotopes and Concentrations in Marine Barite to Document Changes in Ocean Anoxia<\/em><\/strong><\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-0{width:33.333333333333% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-0 > .fusion-column-wrapper {padding-top : 2% !important;padding-right : 0px !important;margin-right : 5.76%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 5.76%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-0{width:33.333333333333% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 5.76%;margin-left : 5.76%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_2_3 2_3 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-2\"><p><strong>Abstract<\/strong><\/p>\n<p>Molybdenum (Mo) isotope ratios in seawater fluctuate in response to changing global ocean redox conditions and can provide clues into the degree of global ocean anoxia.\u00a0 Previous workers have used measured changes in bulk sediment Mo isotope ratios to model changes in seawater Mo isotope ratios and the associated increase in global anoxia.\u00a0 Marine barite, however, may provide a direct record of seawater Mo isotope ratios because it precipitates directly from seawater, incorporating dissolved molybdate (MoO<sub>4<\/sub><sup>2-<\/sup>).\u00a0 I intend to use marine barite to reconstruct the \u03b4<sup>98\/95<\/sup>Mo (=[(<sup>98<\/sup>Mo\/<sup>95<\/sup>Mo)sample\/(<sup>98<\/sup>Mo\/<sup>95<\/sup>Mo)standard \u2013 1] x 1000) of seawater through time.\u00a0 This new method will be calibrated with Holocene core-tops and used to generate a record of ocean redox shifts throughout the Cenozoic and Cretaceous.\u00a0 Insight into the global Mo cycle may further illuminate relationships between oceanic anoxia, biological productivity, and large scale climatic and tectonic changes.<\/p>\n<p><strong>Biography<\/strong><\/p>\n<p>I grew up in Green Bay, Wisconsin, a place associated with ice and snow, not oceans. Thinking that living farther south might help me escape the frozen tundra, I moved to Chicago to pursue a degree in Environmental Engineering at Northwestern University. With an interest in climatic drivers, I realized that geology offered the grander perspective that I was most intrigued by and finished with a second major in Geological Sciences. To further boost my geologic knowledge, I completed my Master\u2019s at the Colorado School of Mines, studying fluvial depositional patterns at the Paleocene\/Eocene boundary in western Colorado. Currently, I am in my third year as a PhD student at Stanford University under the guidance of Dr. Adina Paytan. My research interests lie in using heavy isotope systems to develop new proxies for ocean circulation and anoxia to better understand the linkages between these variables and catastrophic climatic events.<\/p>\n<p><strong><a href=\"https:\/\/www.addtoany.com\/share\" target=\"_blank\" rel=\"noopener\">Share<\/a><\/strong><\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-1{width:66.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-1 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 2.88%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 2.88%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-1{width:66.666666666667% !important;order : 0;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 2.88%;margin-left : 2.88%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-1{width:100% !important;order : 0;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-1{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":0,"parent":19101,"menu_order":63,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-19501","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>2008-2009 Schlanger Fellow - Andrea Erhardt - U.S. Science Support Program<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2008-2009 Schlanger Fellow - Andrea Erhardt - U.S. Science Support Program\" \/>\n<meta property=\"og:url\" content=\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/\" \/>\n<meta property=\"og:site_name\" content=\"U.S. Science Support Program\" \/>\n<meta property=\"article:modified_time\" content=\"2022-08-10T07:29:52+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/\",\"url\":\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/\",\"name\":\"2008-2009 Schlanger Fellow - Andrea Erhardt - U.S. Science Support Program\",\"isPartOf\":{\"@id\":\"\/#website\"},\"datePublished\":\"2016-06-20T18:16:18+00:00\",\"dateModified\":\"2022-08-10T07:29:52+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/usoceandiscovery.org\/past-schlanger-fellows-old\/2008-2009-schlanger-fellow-andrea-erhardt\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/usoceandiscovery.org\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"2008-2009 Schlanger Fellow &#8211; 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