Emerging pattern of global change in the upper atmosphere and ionosphere

Upper Atmosphere and Ionosphere of Saturn

This chapter summarizes our current understanding of the upper atmosphere and ionosphere of Saturn. We summarize the available observations and the various relevant models associated with these regions. We describe what is currently known, outline any controversies and indicate how future observations can help in advancing our understanding of the various controlling physical and chemical proce...

Ionosphere and Upper Atmosphere Research with Radars

a synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

Driving Saturn’s magnetospheric periodicities from the upper atmosphere/ionosphere

[1] Saturn’s magnetospheric structure and the intensity of radio frequency emissions from its immediate surroundings are modulated at close to the planet’s rotation period. Analogous rotation-modulated variations at Jupiter are readily interpreted as effects of the non-axisymmetric intrinsic magnetic field. At Saturn, to the contrary, the high level of axial symmetry in the intrinsic field sugg...

Climate Change in the Upper Atmosphere

Studies of climate change traditionally focus on long-term changes taking place in the troposphere. This is understandable, as this is the part of the atmosphere that most directly affects life on the surface. However, long-term trends higher in the atmosphere can have important consequences as well. The middle and upper atmosphere consist of the stratosphere (~15-50 km), the mesosphere (50-90...