{"id":3005,"date":"2015-01-19T14:50:54","date_gmt":"2015-01-19T13:50:54","guid":{"rendered":"http:\/\/karmaka.de\/?p=3005"},"modified":"2015-02-17T20:42:33","modified_gmt":"2015-02-17T19:42:33","slug":"possible-new-impact-crater-on-king-baudoin-ice-shelf-princess-ragnhild-coast","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=3005","title":{"rendered":"Ice structure discovered at position 69\u00b048&#8217;00.0&#8243;S 32\u00b015&#8217;36.0&#8243;E on Roi Baudoin Ice Shelf, Princess Ragnhild Coast, Queen Maud Land, East Antarctica is not connected to 2004 superbolide"},"content":{"rendered":"<p><strong>UPDATE (17 February 2015)<\/strong> <\/p>\n<p><a href=\"http:\/\/www.sciencepoles.org\/interview\/giant-circular-scar-on-king-baudouin-ice-shelf-a-glaciologists-perspective\" target=\"_blank\"><strong>The giant circular scar on the King Baudouin Ice Shelf: a glaciologist\u2019s perspective<\/strong><\/a><br \/>\nInterview with Dr. Jan Lenaerts (17 February  2015)<\/p>\n<p><a href=\"http:\/\/www.sciencepoles.org\/interview\/taking-a-second-look-at-the-circular-scar-on-the-king-baudoin-ice-shelf\" target=\"_blank\"><strong>Taking a second look at the circular scar on the King Baudoin Ice Shelf<\/strong><\/a><br \/>\nInterview with Graeme Eagles<br \/>\n(20 January 2015)<\/p>\n<p>First published 8 January 2015, 21:04 CET, UPDATED 19 January 2015<\/p>\n<p>Is the newly discovered structure\u00a0 on the Roi Baudoin Ice Shelf (Princess Ragnhild Coast, Queen Maud Land, East Antarctica) really an impact crater or rather an ice doline, as proposed by\u00a0Doug MacAyeal from the University of Chicago?<\/p>\n<p>The analyses of the acquired\u00a0Polar 6 measurements at the Alfred-Wegener-Institut will not start until the beginning of February and might take several months.<\/p>\n<p><a href=\"http:\/\/blogs.helmholtz.de\/eisblog\/en\/2015\/01\/what-caused-the-ring-structure-on-exploration\/\" target=\"_blank\"><strong>What caused the ring structure? On exploration \u2026<br \/>\nby Dr. Olaf Eisen<\/strong><\/a> (19 January 2015)<\/p>\n<p>There is apparently no connection to the Antarctic superbolide of 3rd September 2004.<\/p>\n<p>The size of the structure (~ 3 km) does speak against it being the result of a meteorite impact in connection to the superbolide of 3 September 2004 as well. <\/p>\n<p>Furthermore, the structure can be seen on images of the region from the 1990s. This animation by Allen Pope shows how the position of the structure has moved with the ice since the 1990s.<\/p>\n<p><a href=\"http:\/\/pbs.twimg.com\/tweet_video\/B7WPwtaCQAAj-ye.mp4\" target=\"_blank\"><strong>video MP4 (please play as loop)<\/strong><\/a><\/p>\n<p>&#8220;On December 20th, while on mission aboard AWI\u2019s Polar 6 aircraft over the Princess Ragnhild Coast, geophysicist Christian M\u00fcller from Fielax (a company supporting the survey), looked out of the window of the aircraft and spotted an unusual formation in the ice over the King Baudoin Ice Shelf.&#8221;<\/p>\n<div style=\"width: 810px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/blogs.helmholtz.de\/eisblog\/wp-content\/uploads\/sites\/13\/2015\/01\/20141226_meteorite_photo.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blogs.helmholtz.de\/eisblog\/wp-content\/uploads\/sites\/13\/2015\/01\/20141226_meteorite_photo.jpg\" alt=\"\" width=\"800\" height=\"532\" \/><\/a><p class=\"wp-caption-text\">Aerial photo of the crater site, taken with the Polar 6 board camera, while the aircraft was flying 7000 feet above the ice shelf. Photo: Alfred-Wegener-Institut<\/p><\/div>\n<div id=\"attachment_3006\" style=\"width: 930px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/awi_meteorite_crater_920_517_80_s_c1_c_c.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3006\" class=\"size-full wp-image-3006\" src=\"http:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/awi_meteorite_crater_920_517_80_s_c1_c_c.jpg\" alt=\"Photo of the possible meteorite impact zone taken from AWI's Polar 6 aircraft during an aerial survey - \u00a9 Tobias Binder, AWI\" width=\"920\" height=\"517\" srcset=\"https:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/awi_meteorite_crater_920_517_80_s_c1_c_c.jpg 920w, https:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/awi_meteorite_crater_920_517_80_s_c1_c_c-300x168.jpg 300w\" sizes=\"(max-width: 920px) 100vw, 920px\" \/><\/a><p id=\"caption-attachment-3006\" class=\"wp-caption-text\">Photo of the possible meteorite impact zone taken from AWI&#8217;s Polar 6 aircraft during an aerial survey &#8211; \u00a9 Tobias Binder, AWI<\/p><\/div>\n<p><a href=\"http:\/\/www.sciencepoles.org\/interview\/a-serendipitous-find-during-an-airborne-geophysical-survey\" target=\"_blank\"><strong>A serendipitous find during an airborne geophysical survey<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/www.antarcticstation.org\/news_press\/press_release\/awi_scientists_at_pea_discover_possible_meteorite_impact_site&quot;\" target=\"_blank\"><strong>Press release (8 January 2015) Princess Elisabeth Antarctica Station<\/strong><\/a><\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/player.vimeo.com\/video\/116200931\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p><a href=\"http:\/\/www.antarcticstation.org\/multimedia\/video\/could_awi_scientists_have_discovered_a_new_meteorite_impact_site_in_antarct\" target=\"_blank\"><strong>video interview with Graeme Eagles and Christian M\u00fcller<\/strong><\/a><\/p>\n<p>&#8220;In this video, you see footage of Christian M\u00fcller, along with AWI survey team leader Graeme Eagles, describe what they found on the ice shelf.&#8221;<\/p>\n<p>The picture below shows an overlay of an image of the Antarctic Princess Ragnhild coast line (1999) with a NASA Aqua satellite image (3 September 2004) showing the meteor dust trail (shadows and scattered sunlight) above sea ice one hour after meteoroid&#8217;s disintegration.<br \/>\nThe meteoroid entry was first detected at an altitude of 75 km; at 12:07:20.975 UTC; 67.72\u00b0S, 16.89\u00b0E (left yellow marker in picture) and the disintegration of the meteoroid happened at 32 km (67.688 S, 18.008 E) and 25 km altitude (67.678 S, 18.178 E), see other yellow markers. The intersection of the projected path with the Earth (red marker) was at 67.64\u00b0S, 18.83\u00b0 E, according to Klekociuk et al (2005)<\/p>\n<p><a href=\"http:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/overlap-NEW-5.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-3062\" src=\"http:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/overlap-NEW-5.jpg\" alt=\"overlap NEW 5\" width=\"1484\" height=\"1360\" srcset=\"https:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/overlap-NEW-5.jpg 1484w, https:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/overlap-NEW-5-300x274.jpg 300w, https:\/\/karmaka.de\/wp-content\/uploads\/2015\/01\/overlap-NEW-5-1024x938.jpg 1024w\" sizes=\"(max-width: 1484px) 100vw, 1484px\" \/><\/a><\/p>\n<p>Aqua satellite image photo credit: A. Klekociuk, AAD; NASA<\/p>\n<p><a href=\"http:\/\/meteor.uwo.ca\/~pbrown\/nature03881.pdf\" target=\"_blank\"><strong>Meteoritic dust from the atmospheric disintegration of a large meteoroid, Nature 436 (25 August 2005) (full text, PDF)<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/www.nature.com\/nature\/journal\/v436\/n7054\/extref\/nature03881-s1.doc\" target=\"_blank\"><strong>atmospheric trajectory and heliocentric orbit parameters for the 03 Sep 2004 fireball (DOC)<\/strong><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.nature.com\/nature\/journal\/v436\/n7054\/fig_tab\/nature03881_ft.html\" target=\"_blank\"><strong>Figures and Tables<\/strong><\/a>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <a href=\"http:\/\/www.nature.com\/nature\/journal\/v436\/n7054\/abs\/nature03881.html\" target=\"_blank\"><strong>abstract<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/meteor.uwo.ca\/infra_pub\/arrowsmith-paper.pdf\" target=\"_blank\"><strong>Global Detection of Infrasonic Signals from Three Large Bolides (2007)<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/www.antarctica.gov.au\/__data\/assets\/pdf_file\/0010\/22213\/0520cosmic20hole20in20one.pdf\" target=\"_blank\"><strong>Cosmic hole-in-one: capturing dust (AUSTRALIAN ANTARCTIC MAGAZINE, PAGE 7, ISSUE 8 AUTUMN 2005 (PDF)<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>UPDATE (17 February 2015) The giant circular scar on the King Baudouin Ice Shelf: a glaciologist\u2019s perspective Interview with Dr. Jan Lenaerts (17 February 2015) Taking a second look at the circular scar on the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3187,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90],"tags":[101,118,95,313,893,141,894,902],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/3005"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3005"}],"version-history":[{"count":49,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/3005\/revisions"}],"predecessor-version":[{"id":3879,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/3005\/revisions\/3879"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/media\/3187"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}