نتایج جستجو برای: aeolian landforms
تعداد نتایج: 3280 فیلتر نتایج به سال:
Aeolian features at Oxia Planum ? the 2023 landing site for ExoMars Rosalind Franklin Rover (ERFR) are important Mars exploration because they record information about past and current wind regimes, sand transport vectors, lend insight to abrasion, deposition, of granular material. To characterize regime erosional history we used a combination manual observational machine?learning techniques an...
Using ALS LIDAR DEM and OpenStreetMap data we visualise in ArcGIS the geomorphic features of a large, lowland river which flows through area impacted by urbanisation big city – capital Poland. We present on one map main geomorphological surfaces their exact boundaries: valley edge, terrace front floodplain juxtaposed with buildings transportation corridors. identify convex aeolian fluvial landf...
Aeolian desertification is poorly understood despite its importance for indicating environment change. Here we exploit Gaofen-1(GF-1) and Moderate Resolution Imaging Spectroradiometer (MODIS) data to develop a quick and efficient method for large scale aeolian desertification dynamic monitoring in northern China. This method, which is based on Normalized Difference Desertification Index (NDDI) ...
Soil erosion is driven by not only aeolian but also fluvial transport processes, yet these two types of processes are usually studied independently, thereby precluding effective assessment of overall erosion, potential interactions between the two drivers, and their relative sensitivities to projected changes in climate and land use. Here we provide a perspective that aeolian and fluvial transp...
In the aeolian-dominated conditions of modern Mars, wind-driven sediment deposition and erosion produce a wide range enigmatic landforms on planet's surface. this work, we explore widespread occurrence paleodunes surface Mars. These fossilized bedforms preserve morphologies consistent with transverse dunes, implying an approximately unimodal ancient transport azimuth abundant supply. have previ...
The landscape of the Lower Mesopotamia Plain (LMP) has been moulded by water-related processes, consequently, its Holocene geomorphic evolution strictly connected to fluvial process and anthropogenic water management since 8000 BC. About 6000 years ago, during maximum marine ingression, modern cities Nasiriyah Al-Amara were close Persian Gulf shoreline. Successively, Tigris Euphrates developed ...
Particle size analysis of lacustrine core sediments and atmospheric natural dust were conducted in the drainage area of Ebinur Lake in arid northwest China. Using a combination of (137)Cs and (210)Pb dating, a continuous record of aeolian transportation to the lake sediments and related factors over about the past 150 years was analyzed. Factor analysis revealed the particle-size distributions ...
The Méma is a semi-arid region in central Mali with a rich archaeological heritage indicating the former existence of large urban settlements. The archaeological data suggest millennia of occupation history of the Méma preceding relatively sudden abandonment by the 14th or 15th century AD. Population numbers have remained low since then and today’s human presence in the area is sparse and large...
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