Many vertical seismic velocity anomalies observed below different parts of the Eurasian plate are rooted in transition zone between upper and lower mantle (410–660 km), forming so-called secondary plumes. These interpreted as result thermal effects large-scale upwelling (primary plume) or deep dehydration fluid-rich subducting oceanic plates. We present results thermo-mechanical numerical model...

Polar regions of the Sun are areas where coronal holes are most profound and where the heating and acceleration of solar wind plasma takes place. The observed and yet unexplained radio emission from these regions may be related to the origin of the solar wind flow. The recent analysis of radio brightenings near the poles at 87 GHz (3.5 mm) suggested structural counterparts like polar plumes, EU...

Since 2004, the satellite-borne Ozone Mapping Instrument (OMI) has observed sulphur dioxide (SO2) plumes during both quiescence and effusive eruptive activity at Soufrière Hills Volcano, Montserrat. On average, OMI detected a SO2 plume 4-6 times more frequently during effusive periods than during quiescence in the 2008-2010 period. The increased ability of OMI to detect SO2 during eruptive peri...

Mantle plumes are thought to play a key role in transferring heat from the core-mantle boundary to the lithosphere, where it can significantly influence plate tectonics. On impinging on the lithosphere at spreading ridges or in intra-plate settings, mantle plumes may generate hotspots, large igneous provinces and hence considerable dynamic topography. However, the active role of mantle plumes o...