Nerium oleander /ËnÉªÉriÉm ËoÊliË.Ã¦ndÉr/[3] is a shrub or small tree in the dogbane family Apocynaceae, toxic in all its parts. It is the only species currently classified in the genus Nerium.
Troposphere. The troposphere (from Greek: tropein-to change, circulate or mix) is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer, although some may extend into the lower portion of the stratosphere.emperature and water vapor content in the troposphere decrease rapidly with altitude and thus most of the water vapour in the troposphere is concentrated in the lower, warmer zone. Water vapor concentrations vary with latitude.
In the atmosphere Auroras usually occur in the ionosphere (the highest part of the atmosphere, between the thermosphere and the exosphere. The ionosphere gets its name because it is ionized by solar radiation.). We typically see auroras only in high-latitude areas above about 50 degrees (north or south).he Aurora Borealis and its southern counterpart the Aurora Australis are formed high in the atmosphere in the ionosphere, which is sometimes considered as part of the thermos â¦ phere, the outermost actual atmosphere.