wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. regarding the importance of wind effects on sand dunes especially in iran, in this study, khartooran erg was analyzed to determine wind direction and to detect sand source sites. khartooran erg is located on eastern north of iran and lies in khorasan razavi and semnan...

Abstract Solar wind protons undergo significant heating during the expansion of solar and turbulence plays an important role in this process. It is believed that energy injected from energy-containing range into inertial then transferred to dissipate heat eventually. However, injection process heliosphere remains unclear. Here we analyze We utilize Helios 2 Ulysses measurements fast at differen...

abstract wind erosion of soils and suspended particles in iran is one of the serious environmental and agricultural problems which affect agricultural lands, water reservoirs, irrigation canals, drains and etc. therefore wind erosion control needs attention specially in arid and semi-arid regions. although in recent years, some polymeric materials have been used for improvement of structural st...