منابع مشابه
Tropical westerlies over Pangaean sand seas
Cross-equatorial, westerly winds are key features of tropical circulation in monsoonal regions. Although prominent in numerical climate models of Pangaea (the supercontinent straddling earth’s equator, Late Palaeozoic to Early Mesozoic), such flow has not been confirmed previously by migration directions of ancient dunes. Wind-blown sandstones that span 100 million years of earth history are wi...
متن کاملEffect of Constructing Canal in Embankments on Sand Flow through Railway Tracks in Desert Regions
Entry of sand dunes into the railway tracks can result in sand deposition on tracks, railway obstruction, derailment, damage to track flexibility, and impairment of electrical signs and rail fleet. It is aimed to investigate the strategies and solutions for reducing sand aggregation on railway tracks (including construction of sand passage canals through embankments and modification of the geom...
متن کاملDyadobacter alkalitolerans sp. nov., isolated from desert sand.
A polyphasic taxonomic approach was used to study strain 12116T, which was isolated from desert sand in Xinjiang, China. Cells of the isolate were Gram-negative, non-motile, rod-shaped and aerobic. MK-7 was the predominant respiratory menaquinone. The DNA G+C content was 46.3 mol%. A phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate was most closely related to the m...
متن کاملSeed Mucilage Improves Seedling Emergence of a Sand Desert Shrub
The success of seedling establishment of desert plants is determined by seedling emergence response to an unpredictable precipitation regime. Sand burial is a crucial and frequent environmental stress that impacts seedling establishment on sand dunes. However, little is known about the ecological role of seed mucilage in seedling emergence in arid sandy environments. We hypothesized that seed m...
متن کاملChange Detection of Desert Sand Dunes: A Remote Sensing Approach
Deserts are one of the major landforms on the Earth. While deserts occupy about one-fifth of Earth’s land surface, they have been studied to a much lesser extent. All over the world, desert landforms are expanding ever rapidly and more and more human settlements are finding place in desert regions for habitation. Thus, quantifying and monitoring dunes becomes more relevant from a managerial per...
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ژورنال
عنوان ژورنال: Episodes
سال: 1988
ISSN: 0705-3797,2586-1298
DOI: 10.18814/epiiugs/1988/v11i1/004