Plasma Plumes Over Africa?

Variation of ionospheric slab thickness over South Africa

Ionospheric slab thickness is defined as the ratio of TEC to maximum electron density of the F-region (NmF2), proportional to the square of the F2-layer critical frequency (foF2). It is an important parameter in that it is linearly correlated with scale height of the ionosphere, which is related to electron density profile. It also reflects variation of the neutral temperature. Therefore, ionos...

Mantle plumes and associated flow beneath Arabia and East Africa

Doppler lidar observations of Russian forest fire plumes over Helsinki

In August 2006, forest fires in north-western Russia led to elevated concentrations of fine particles reducing air quality in southern Finland over a number of weeks. Predominately easterly and south-easterly winds resulted in smoke plumes extending over the Gulf of Finland and affecting eastern and southern Finland during 7–14 August 2006 and 21–23 August 2006. This article describes observati...

Magnetic reconnection between colliding magnetized laser-produced plasma plumes.

Observations of magnetic reconnection between colliding plumes of magnetized laser-produced plasma are presented. Two counterpropagating plasma flows are created by irradiating oppositely placed plastic (CH) targets with 1.8-kJ, 2-ns laser beams on the Omega EP Laser System. The interaction region between the plumes is prefilled with a low-density background plasma and magnetized by an external...

Time resolved Nomarski interferometery of laser produced plasma plumes

We report results from optical interferometric probing of a laser generated Zn plasma plume. The experiment was performed in a vacuum and O2 rich environments where the background pressure of O2 wasmaintained at 1000 Pa and the results from both regimes are compared. The focus of our work is very much on the early stages in the life of the plasma plumewhich remains, to date, a largely unexplore...