{"id":5505,"date":"2015-05-12T07:31:52","date_gmt":"2015-05-12T05:31:52","guid":{"rendered":"https:\/\/uniavisen.dk\/?p=5505\/"},"modified":"2021-01-25T12:34:56","modified_gmt":"2021-01-25T11:34:56","slug":"up-on-the-ice-sheet-looking-down-with-a-radar","status":"publish","type":"post","link":"https:\/\/uniavisen.dk\/en\/up-on-the-ice-sheet-looking-down-with-a-radar\/","title":{"rendered":"Up on the ice sheet – looking down with a radar"},"content":{"rendered":"

When I arrived in the middle of the Greenland Ice Sheet, temperatures were -35 degrees Celsius. There is something truly special about being in such an isolated location and experiencing such extreme conditions. Then you discover that even in those temperatures and at 2km altitude it is still possible to work outside, even to do science outside and collect some unique hard-to-get data.<\/p>\n

\n

Lab and Library<\/p>\n

In our Lab and Library series, PhD students and Postdocs from the University of Copenhagen write in to share their stories about science and research.<\/p>\n

BROWSE THROUGH the Lab and Library series here.<\/strong><\/a><\/p>\n<\/div>\n

I am doing research in conjunction with NEEM, the North Greenland Eemian Ice Drilling, an international ice core project retrieving an ice core from North-West Greenland reaching back through the previous interglacial, the Eemian.<\/p>\n

Glaciology is the study of glaciers and ice sheets. In that way, what I do is directly linked to studying the impacts of climate change. I use radar data and models of ice sheets to understand how Greenland and Antarctica have behaved in the past. This helps predict how the ice sheets will behave in a warming climate, and how they might influence the rise in sea-level.<\/p>\n

One of the things we will be looking for in our fieldwork this year is traces of the big melt event in 2012 where almost the whole surface of the Greenland Ice Sheet was at melting point. In a warming world, an event such as this might become more and more common, and we are trying to understand the impacts it will have.<\/p>\n

This year I will be collecting several hundred kilometres of radar data from a skidoo (or snow machine for the Americans) in Greenland, starting at our drill camp NEEM and ending at our new drill site EastGRIP.<\/p>\n

BROWSE THROUGH the Lab and Library series here.<\/strong><\/a><\/p>\n

The best part is the team spirit we have. You easily spent all day helping a colleague digging out some equipment that is covered by several metres of snow. The next day, another colleague will help you move the heavy equipment that you can\u2019t possibly lift on your own. It is a team effort and it has to be, otherwise it wouldn\u2019t be possible. It is part of the deal that the toilet is a tent outside, phone calls are limited to 5min once a week, and you get to see all your colleagues in their woolly underwear.\"\"<\/picture><\/p>\n

The most exciting part of it all for me are the radar measurements. The equipment just gets better and better and the resolution is amazing. Basically, we emit a radar signal into the ice and study the signal we get back.<\/p>\n

We can see layering in the ice and when we compare it to the ice core we often find that the layers correspond to, say, ancient volcanic eruptions. So, thousands of years ago a volcano somewhere in the world erupted, it sent out a huge amount of acid and dust, and now we can see that in the ice with our radar equipment.<\/p>\n

\"\"<\/picture>Read about Nanna’s team’s fieldwork here<\/a> and more on Nanna’s previous research on the planet Mars’ glaciers here<\/a>.<\/em><\/div>\n

Follow the NEEM to EGRIP ice cap research Twitter feed here<\/a>.<\/p>\n

BROWSE THROUGH the Lab and Library series here.<\/strong><\/a>
\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Thousands of years ago a volcano somewhere in the world erupted. Now we can see its acid and dust in the ice with our radar equipment. 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& Library","text":"Thousands of years ago a volcano somewhere in the world erupted. Now we can see its acid and dust in the ice with our radar equipment. Nanna is doing field work on the top of Greenland","use_post_excerpt":false},{"acf_fc_layout":"Byline","is_author":false,"contributors":[{"use_registered_user":false,"user":false,"contributor_name":"Nanna Bj\u00f8rnholt Karlsson","contributor_title":"\u00a0","contributor_image":false}]},{"acf_fc_layout":"Content","content":"<p>When I arrived in the middle of the Greenland Ice Sheet, temperatures were -35 degrees Celsius. There is something truly special about being in such an isolated location and experiencing such extreme conditions. Then you discover that even in those temperatures and at 2km altitude it is still possible to work outside, even to do science outside and collect some unique hard-to-get data.<\/p>\n<div class=\"factbox\">\n<p class=\"factbox-header feature-color\">Lab and Library<\/p>\n<p>In our Lab and Library series, PhD students and Postdocs from the University of Copenhagen write in to share their stories about science and research.<\/p>\n<p><a href=\"https:\/\/uniavisen.dk\/en\/lab-and-library-features-by-scientists-2013-2016\/\"><strong>BROWSE THROUGH the Lab and Library series here.<\/strong><\/a><\/p>\n<\/div>\n<p>I am doing research in conjunction with NEEM, the North Greenland Eemian Ice Drilling, an international ice core project retrieving an ice core from North-West Greenland reaching back through the previous interglacial, the Eemian.<\/p>\n<p>Glaciology is the study of glaciers and ice sheets. In that way, what I do is directly linked to studying the impacts of climate change. I use radar data and models of ice sheets to understand how Greenland and Antarctica have behaved in the past. This helps predict how the ice sheets will behave in a warming climate, and how they might influence the rise in sea-level.<\/p>\n<p>One of the things we will be looking for in our fieldwork this year is traces of the big melt event in 2012 where almost the whole surface of the Greenland Ice Sheet was at melting point. In a warming world, an event such as this might become more and more common, and we are trying to understand the impacts it will have.<\/p>\n<p>This year I will be collecting several hundred kilometres of radar data from a skidoo (or snow machine for the Americans) in Greenland, starting at our drill camp NEEM and ending at our new drill site EastGRIP.<\/p>\n<p><a href=\"https:\/\/uniavisen.dk\/en\/lab-and-library-features-by-scientists-2013-2016\/\"><strong>BROWSE THROUGH the Lab and Library series here.<\/strong><\/a><\/p>\n<p>The best part is the team spirit we have. You easily spent all day helping a colleague digging out some equipment that is covered by several metres of snow. The next day, another colleague will help you move the heavy equipment that you can\u2019t possibly lift on your own. It is a team effort and it has to be, otherwise it wouldn\u2019t be possible. It is part of the deal that the toilet is a tent outside, phone calls are limited to 5min once a week, and you get to see all your colleagues in their woolly underwear.<img decoding=\"async\" title=\"\" src=\"\/old_files\/labnlib_190_for_embedding.jpg\" alt=\"\" \/><\/p>\n<p>The most exciting part of it all for me are the radar measurements. The equipment just gets better and better and the resolution is amazing. Basically, we emit a radar signal into the ice and study the signal we get back.<\/p>\n<p>We can see layering in the ice and when we compare it to the ice core we often find that the layers correspond to, say, ancient volcanic eruptions. So, thousands of years ago a volcano somewhere in the world erupted, it sent out a huge amount of acid and dust, and now we can see that in the ice with our radar equipment.<\/p>\n<div class=\"dme-image dme-image-center dme-image-preset-0\"><img decoding=\"async\" title=\"\" src=\"\/old_files\/p1000009mini.jpg\" alt=\"\" \/><em>Read about Nanna’s team’s fieldwork <a href=\"http:\/\/neem.dk\/field_diaries_folder\/dk_diaries_2015\" target=\"_blank\" rel=\"noopener\">here<\/a> and more on Nanna’s previous research <a href=\"http:\/\/www.nbi.ku.dk\/english\/news\/news15\/mars-has-belts-of-glaciers-consisting-of-frozen-water\/\" target=\"_blank\" rel=\"noopener\">on the planet Mars’ glaciers here<\/a>.<\/em><\/div>\n<p>Follow the NEEM to EGRIP <a href=\"https:\/\/twitter.com\/NEEM_to_EGRIP\" target=\"_blank\" rel=\"noopener\">ice cap research Twitter feed here<\/a>.<\/p>\n<p><a href=\"https:\/\/uniavisen.dk\/en\/lab-and-library-features-by-scientists-2013-2016\/\"><strong>BROWSE THROUGH the Lab and Library series here.<\/strong><\/a><\/p>\n"},{"acf_fc_layout":"ArticleEnd"},{"acf_fc_layout":"Newsletter","lang_select":"en","identifier":"Newsletter","headline":"Get a bi-weekly newsletter in your inbox","button_text":"Sign up here","class":""},{"acf_fc_layout":"OtherStories","headline":"Written by scientists: Our Lab and Library feature","hand_picked_posts":false,"references":false,"category":[46],"theme":1324,"number_of_posts":"4","style":"default"}],"feature_color":"","article_updated":""},"taxonomyData":{"category":[{"term_id":46,"name":"Science","slug":"science","term_group":0,"term_taxonomy_id":46,"taxonomy":"category","description":"","parent":0,"count":832,"filter":"raw"}],"post_tag":[{"term_id":1324,"name":"Lab and Library","slug":"lab-and-library","term_group":0,"term_taxonomy_id":1324,"taxonomy":"post_tag","description":"","parent":0,"count":19,"filter":"raw"}],"post_format":[],"expression":[{"term_id":15,"name":"News Article","slug":"news_article","term_group":0,"term_taxonomy_id":15,"taxonomy":"expression","description":"","parent":0,"count":11492,"filter":"raw"}],"translation_priority":[]},"featured_media_url":"https:\/\/uniavisen.dk\/wp-content\/uploads\/2015\/05\/dscn1596mini.jpg","_links":{"self":[{"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/posts\/5505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/comments?post=5505"}],"version-history":[{"count":5,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/posts\/5505\/revisions"}],"predecessor-version":[{"id":115887,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/posts\/5505\/revisions\/115887"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/media\/5506"}],"wp:attachment":[{"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/media?parent=5505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/categories?post=5505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uniavisen.dk\/en\/wp-json\/wp\/v2\/tags?post=5505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}