{"id":581,"date":"2014-06-16T11:08:39","date_gmt":"2014-06-16T18:08:39","guid":{"rendered":"http:\/\/carolinebeghein.com\/?page_id=581"},"modified":"2018-03-09T20:51:59","modified_gmt":"2018-03-10T03:51:59","slug":"radial-anisotropy-top-1200-km-mantle","status":"publish","type":"page","link":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/research\/global-tomography\/radial-anisotropy-top-1200-km-mantle\/","title":{"rendered":"Radial Anisotropy in the top 1200 km of the Mantle"},"content":{"rendered":"
\n
\n
\n

MODEL DOWNLOAD<\/span><\/p>\n

Coming eventually…<\/p>\n

Citation<\/span>:<\/p>\n

\"lnk\"<\/a>\u00a0Beghein, C<\/span>., and Trampert, J., Probability density functions for radial anisotropy: implications for the upper 1200 km of the mantle, Earth Planet. Sci. Lett., 217 (1-2), 151-162, doi:10.1016\/S0012-821X(03)00575-2,\u00a0 2004<\/p>\n

The maps shown below were not included in the paper and are thus complementary to the published figures<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n
\n
\n
\"Mean<\/a>
Mean 3-D radial anisotropy model<\/figcaption><\/figure>\n

Before interpreting this model one should remember that this is the mean model, not necessarily the best fitting model, and that it is accompanied by large uncertainties (see below).<\/p>\n

This mean model was obtained using the NA and without any prior relationship between the different elastic parameters. It shows a significant anisotropy down to the transition zone, especially below ocean ridges, where we have VSH<\/span><VSV<\/span>\u00a0and VPH<\/span>>VPV<\/span>. We also see a correlation between \u03be and \u03a6 circum Pacific in the transition zone, and to a lesser extent between \u03a6 and \u03b7.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\"Standard<\/a>
Standard deviation for radial anisotropy parameters<\/figcaption><\/figure>\n<\/div>\n<\/div>\n

The mean model obtained using the NA and without any prior relationship between the different elastic parameters shows a correlation between dlnVS and dlnVP, as expected from body wave data, and this justifies scaling P- and S-wave anomalies at these depths in future inversions. Density anomalies appear anti-correlated to velocity perturbations, which may suggest a non-negligible chemical component to the origin of the heterogeneities. Large uncertainties are however associated with density (see below). We also notice that velocity anomalies of 1-2% are present in the transition zone. VS is resolved within uncertainties.<\/p>\n

\"Mean<\/a>
Mean 3-D degree 8 isotropic model<\/figcaption><\/figure>\n
\"Standard<\/a>
Standard deviation for isotropic anomalies<\/figcaption><\/figure>\n

This work was presented at the following meetings and conferences:<\/p>\n

    \n
  1. Beghein, C., and Trampert, J., Lateral variations in radial anisotropy and consequences for the upper 1200km of the mantle, EGU, Nice, France, Abstract, 2004<\/li>\n
  2. Beghein, C., and Trampert, J., Lateral variations in radial anisotropy down to 1200km depth, EOS Transactions, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract, 2003<\/li>\n
  3. Beghein, C., and Trampert, J., Lateral variations in radial anisotropy in the upper 1200km of the mantle, The Deep Earth: Theory, Experiment and Observation, Acquafredda di Maratea, Italy, Sept. 2003<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    MODEL DOWNLOAD Coming eventually… Citation: \u00a0Beghein, C., and Trampert, J., Probability density functions for radial anisotropy: implications for the upper 1200 km of the mantle, Earth Planet. Sci. Lett., 217 (1-2), 151-162, doi:10.1016\/S0012-821X(03)00575-2,\u00a0 2004 The maps shown below were not included in the paper and are thus complementary to the published figures Before interpreting this … <\/p>\n

    Read more “Radial Anisotropy in the top 1200 km of the Mantle”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":590,"parent":175,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inspiro_hide_title":false,"footnotes":""},"class_list":["post-581","page","type-page","status-publish","has-post-thumbnail","hentry"],"jetpack_sharing_enabled":false,"featured_media_urls":{"thumbnail":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-150x150.png",150,150,true],"medium":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-300x232.png",300,232,true],"medium_large":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho.png",768,593,false],"large":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1024x791.png",950,734,true],"1536x1536":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1536x1187.png",1536,1187,true],"2048x2048":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho.png",1650,1275,false],"inspiro-featured-image":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho.png",1650,1275,false],"inspiro-loop":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-950x320.png",950,320,true],"inspiro-loop@2x":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1650x640.png",1650,640,true],"portfolio_item-thumbnail":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-600x400.png",600,400,true],"portfolio_item-thumbnail@2x":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1200x800.png",1200,800,true],"portfolio_item-masonry":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-600x464.png",600,464,true],"portfolio_item-masonry@2x":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1200x927.png",1200,927,true],"portfolio_item-thumbnail_cinema":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-800x335.png",800,335,true],"portfolio_item-thumbnail_portrait":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-600x900.png",600,900,true],"portfolio_item-thumbnail_portrait@2x":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-1200x1275.png",1200,1275,true],"portfolio_item-thumbnail_square":["https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-content\/uploads\/2014\/06\/2004EPSL_meanvsvprho-800x800.png",800,800,true]},"_links":{"self":[{"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/pages\/581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/comments?post=581"}],"version-history":[{"count":4,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/pages\/581\/revisions"}],"predecessor-version":[{"id":2170,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/pages\/581\/revisions\/2170"}],"up":[{"embeddable":true,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/pages\/175"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/media\/590"}],"wp:attachment":[{"href":"https:\/\/faculty.epss.ucla.edu\/~cbeghein\/wp-json\/wp\/v2\/media?parent=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}