An alternative early opening scenario for the Central Atlantic Ocean

New pole for early opening of South Atlantic

--USING the trends of equatorial, marginal fracture ridgcs, Le Pichon and Hayes1 proposed an early phase for the opening of the South Atlantic, with a pole of rotation at 21.5-N, 14'W with respect to Africa. Francheteau and Le Pichon2 tested this plate tectonic model with the whole South Atlantic and assunied that there is a relationship between continental niargin offscts, the subsidence of co...

The LARES mission revisited: an alternative scenario

In the original LARES mission the general relativistic Lense–Thirring effect would be detected by using as observable the sum of the residuals of the nodes of the existing passive geodetic laser-ranged LAGEOS satellite and of its proposed twin LARES. The proposed nominal orbital configuration of the latter one would reduce the systematic error due to the mismodelling in the even zonal harmonics...

The Deep Atlantic Ocean

The Atlantic Ocean is a long sinuous ocean which originated during the Mesozoic following the breakup of the supercontinent of Pangea. For most of its length, the eastern and western boundaries are clearly defined by land masses, except where it is separated from the Caribbean Sea and Gulf of Mexico by troughs and trenches. The northern and southern limits are more difficult to define. To the n...

[WC] and PG1159 Central Stars of Planetary Nebula: the Need for an Alternative to the Born-Again Scenario

Hydrogen-deficient central stars of planetary nebula such as WolfRayet and PG1159 central stars and some weak emission line stars are primarily composed of helium and carbon. This abundance is well explained by a scenario where a single post-AGB star experiences a last helium shell flash which ingests and burns, or simply dilutes, the remaining hydrogen atmosphere. But despite its success in ma...

The central role of ocean dynamics in connecting the North Atlantic Oscillation 1 to the Atlantic Multidecadal Oscillation