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10.1038/ncomms8865 http://scihub22266oqcxt.onion/10.1038/ncomms8865 C4525173!4525173!26218786     free     free     free Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Nat+Commun 2015 ; 6 (ä): ä Nephropedia Template TP {{tp|p=26218786|t=2015. Antiquity of the South Atlantic Anomaly and evidence for top-down control on the geodynamo |pdf=|usr=}}{{26218786}} gab.com Text Antiquity of the South Atlantic Anomaly and evidence for top-down control on the geodynamo JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=26218786 #FOAvip The dramatic decay of dipole geomagnetic field intensity during the last 160 years coincides with changes in Southern Hemisphere (SH) field morphology and has motivated speculation of an impending reversal. Understanding these changes, however, has been limited by the lack of longer-term SH observations. Here we report the first archaeomagnetic curve from southern Africa (ca. 1000?1600 AD). Directions change relatively rapidly at ca. 1300 AD, whereas intensities drop sharply, at a rate greater than modern field changes in southern Africa, and to lower values. We propose that the recurrence of low field strengths reflects core flux expulsion promoted by the unusual core?mantle boundary (CMB) composition and structure beneath southern Africa defined by the African large low shear velocity province (LLSVP). Because the African LLSVP and CMB structure are ancient, this region may have been a steady site for flux expulsion, and triggering of geomagnetic reversals, for millions of years. Twit Text FOAVip Antiquity of the South Atlantic Anomaly and evidence for top-down control on the geodynamo ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=26218786 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=26218786 #FOAvip English Wikipedia <ref>{{Cite pmid|26218786}}</ref> Antiquity of the South Atlantic Anomaly and evidence for top-down control on the geodynamo #MMPMID26218786 Tarduno JA; Watkeys MK; Huffman TN; Cottrell RD; Blackman EG; Wendt A; Scribner CA; Wagner CL Nat Commun 2015[]; 6 (ä): ä PMID26218786show ga The dramatic decay of dipole geomagnetic field intensity during the last 160 years coincides with changes in Southern Hemisphere (SH) field morphology and has motivated speculation of an impending reversal. Understanding these changes, however, has been limited by the lack of longer-term SH observations. Here we report the first archaeomagnetic curve from southern Africa (ca. 1000?1600 AD). Directions change relatively rapidly at ca. 1300 AD, whereas intensities drop sharply, at a rate greater than modern field changes in southern Africa, and to lower values. We propose that the recurrence of low field strengths reflects core flux expulsion promoted by the unusual core?mantle boundary (CMB) composition and structure beneath southern Africa defined by the African large low shear velocity province (LLSVP). Because the African LLSVP and CMB structure are ancient, this region may have been a steady site for flux expulsion, and triggering of geomagnetic reversals, for millions of years. äAntiquity of the South Atlantic Anomaly and evidence for top-down cont(epmc).pdf DeepDyve Pubget Overpricing