{"id":82091,"date":"2019-11-12T17:32:22","date_gmt":"2019-11-12T23:32:22","guid":{"rendered":"https:\/\/news.medill.northwestern.edu\/chicago\/?p=82091"},"modified":"2020-06-06T12:13:19","modified_gmt":"2020-06-06T17:13:19","slug":"research-suggests-khumbu-glacier-in-nepal-may-retreat-quickly-in-the-future","status":"publish","type":"post","link":"https:\/\/news.medill.northwestern.edu\/chicago\/research-suggests-khumbu-glacier-in-nepal-may-retreat-quickly-in-the-future\/","title":{"rendered":"Khumbu Glacier in Nepal offers clues to rapid retreat of ice"},"content":{"rendered":"<p><strong style=\"color: #2b2b2b;font-size: 16px\">By Anne Snabes<br \/>\n<\/strong><em>Medill Reports<\/em><\/p>\n<p class=\"dropcap\">The Khumbu Glacier in the Himalayas retreated rapidly in the past, offering clues to how the glacier will behave in the future, University of Maine research suggests.<\/p>\n<p>Laura Mattas, a master\u2019s student at the university, conducted field research this summer on the Khumbu Glacier in Nepal. She presented her research this fall at the Comer Climate Conference, an annual meeting in Wisconsin of climate scientists from across the country.<\/p>\n<p>According to the National Snow &amp; Ice Data Center, glaciers globally are retreating at \u201cunprecedented rates.\u201d A glacier can retreat by shortening in length or by thinning. In the Khumbu Valley, Mattas and her colleagues found moraines, which are rock and other sediment that were inside, on top of or below a glacier and that were altered by the glacier. The location of the moraines indicated that the glacier retreated quickly at some point since the last ice age. Mattas said that the glacier is able to undergo a \u201clarge and rapid change,\u201d which means that it may also change rapidly in the future.<\/p>\n<p>\u201cIf that&#8217;s the case, that&#8217;s a lot of meltwater that&#8217;s flowing down valley,&#8221; she said. &#8220;Who knows if there&#8217;s the infrastructure to deal with\u201d the surge.<!--more--><\/p>\n<figure id=\"attachment_82803\" aria-describedby=\"caption-attachment-82803\" style=\"width: 733px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-82803\" src=\"https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/11\/Lauraprofile.jpg\" alt=\"\" width=\"733\" height=\"715\" srcset=\"https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/11\/Lauraprofile.jpg 733w, https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/11\/Lauraprofile-300x293.jpg 300w\" sizes=\"(max-width: 733px) 100vw, 733px\" \/><figcaption id=\"caption-attachment-82803\" class=\"wp-caption-text\">Laura Mattas, a master&#8217;s student at the University of Maine, is following the retreat of the Khumbu Glacier. (Anne Snabes\/MEDILL)<\/figcaption><\/figure>\n<p>Mattas and other researchers collected 77 samples of rock from the valley, which can demonstrate how the glacier has behaved from the last ice age to today.<\/p>\n<p>\u201cThat could predict what the future warming of this area looks like,\u201d she said, \u201cbecause if it&#8217;s known to go fast and just give all that meltwater, then it could be predicting that this glacier is &#8230; going through an irreversible retreat.\u201d<\/p>\n<p>Mattas said she and the research group found moraines at a village called Dingboche and at a nearby settlement called Lobuche. A scientist previously found that the moraines in Dingboche were formed during the last ice age. The moraines at Lobuche, on the other hand, are more modern, but Mattas still has to determine their exact date.<\/p>\n<p>The scientists did not see any moraines between Dingboche and Lobuche.<\/p>\n<p>\u201cAs we walked from Dingboche to Lobuche, there was absolutely nothing,\u201d Mattas said.<\/p>\n<p>The lack of moraines between the two locations suggests that the glacier melted quickly. If the glacier had retreated more gradually, it would have formed moraines about every few thousand years, so the terrain would show several lines of moraines in the space between Dingboche and Lobuche.<\/p>\n<p>Mattas said a glacier has to sit in one place long enough to form moraines. But in this case, the glacier moved too quickly.<\/p>\n<p>Mattas\u2019 conclusion that the Khumbu Glacier retreated quickly is a preliminary field observation, but it still needs to be supported by data. The samples of rock that Mattas and her colleagues collected may provide the evidence needed to back her claim. They retrieved the rock by drilling holes in boulders. The scientists will employ a technique called Beryllium-10 dating, which can tell them the age of the moraines. This age gives researchers an approximation of when the glacier retreated, according to Mattas.<\/p>\n<figure id=\"attachment_82573\" aria-describedby=\"caption-attachment-82573\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-full wp-image-82573\" src=\"https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/10\/moraineskhumbu.jpg\" alt=\"\" width=\"1100\" height=\"724\" srcset=\"https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/10\/moraineskhumbu.jpg 1100w, https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/10\/moraineskhumbu-300x197.jpg 300w, https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/10\/moraineskhumbu-768x505.jpg 768w, https:\/\/news.medill.northwestern.edu\/chicago\/wp-content\/uploads\/sites\/3\/2019\/10\/moraineskhumbu-1024x674.jpg 1024w\" sizes=\"(max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-82573\" class=\"wp-caption-text\">The research team sits by moraines that were formed by the Khumbu Glacier. The research trip was part of National Geographic and Rolex&#8217;s <a href=\"http:\/\/www.NatGeo.com\/Everest\" target=\"_blank\" rel=\"noopener noreferrer\">Perpetual Planet Extreme Exhibition: Everest<\/a>. Photo courtesy of Laura Mattas.<\/figcaption><\/figure>\n<p>Sidney Hemming, a professor of earth and environmental sciences at Columbia University, said she agrees that in order to accommodate the researchers&#8217; observations, there had to be a &#8220;really quick retreat.&#8221; Hemming said that it does not really matter what the ages of the two moraine belts are.<\/p>\n<p>\u201cThe fact that there&#8217;s this big space in between them with no moraines in there means that there had to be a rapid retreat, right?\u201d she explained.<\/p>\n<p>Mattas said she and other researchers are currently studying the past so they can learn what the Khumbu Glacier is capable of doing in the future.<\/p>\n<p>\u201cWe\u2019re trying to see how it reacted in the past,\u201d she said, \u201cand from that data, we hope to then use a predictive model to see if that is possible in what we\u2019re seeing today.\u201d<\/p>\n<div class=\"featurecaption\">Photo at top: The Khumbu Glacier retreated rapidly at some point between the last ice age and today, and Laura Mattas is trying to determine the exact date of the retreat. She and her colleagues conducted research in the Khumbu Valley as a part of National Geographic and Rolex&#8217;s <a href=\"http:\/\/www.NatGeo.com\/Everest\" target=\"_blank\" rel=\"noopener noreferrer\">Perpetual Planet Extreme Exhibition: Everest<\/a>. (Courtesy of Laura Mattas.)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>By Anne Snabes Medill Reports The Khumbu Glacier in the Himalayas retreated rapidly in the past, offering clues to how the glacier will behave in the future, University of Maine research suggests. Laura Mattas, a master\u2019s student at the university, conducted field research this summer on the Khumbu Glacier in Nepal. She presented her research [&hellip;]<\/p>\n","protected":false},"author":621,"featured_media":82103,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[452,4780,28,29,30],"tags":[4834,4859,4858],"class_list":["post-82091","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-beyond-chicago","category-fall-2019","category-general-interest","category-health-and-science","category-public-affairs","tag-khumbu-glacier","tag-laura-mattas","tag-nepal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Khumbu Glacier in Nepal offers clues to rapid retreat of ice - Medill Reports Chicago<\/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:\/\/news.medill.northwestern.edu\/chicago\/research-suggests-khumbu-glacier-in-nepal-may-retreat-quickly-in-the-future\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Khumbu Glacier in Nepal offers clues to rapid retreat of ice - Medill Reports Chicago\" \/>\n<meta property=\"og:description\" content=\"By Anne Snabes Medill Reports The Khumbu Glacier in the Himalayas retreated rapidly in the past, offering clues to how the glacier will behave in the future, University of Maine research suggests. Laura Mattas, a master\u2019s student at the university, conducted field research this summer on the Khumbu Glacier in Nepal. 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Laura Mattas, a master\u2019s student at the university, conducted field research this summer on the Khumbu Glacier in Nepal. 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