منابع مشابه
The Planet Simulator: Green planet and desert world
An application of the Planet Simulator is presented to estimate the maximum effect of vegetation on the Earth’s climate. Four sets of sensitivity experiments are performed: (1) All vegetation related land surface parameters are changed simultaneously. (2) Only one effect of vegetation on climate is considered: albedo, surface roughness and soil hydrology. To identify the nature of vegetation-cl...
متن کاملModelling Desert Dune Fields Based on Discrete Dynamics
A mathematical formulation is developed to model the dynamics of sand dunes. The physical processes display strong non-linearity that has been taken into account in the model. When assessing the success of such a model in capturing physical features we monitor morphology, dune growth, dune migration and spatial patterns within a dune field. Following recent advances, the proposed model is based...
متن کاملPlant Responses to an Edaphic Gradient across an Active Sand Dune/desert Boundary in the Great Basin Desert
In arid ecosystems, variation in precipitation causes broad-scale spatial heterogeneity in soil moisture, but differences in soil texture, development, and plant cover can also create substantial local soil moisture heterogeneity. The boundary between inland desert sand dunes and adjacent desert habitats exhibits abrupt changes in soil and vegetation characteristics that may be associated with ...
متن کاملGroundwater recharge in natural dune systems and agricultural ecosystems in the Thar Desert region, Rajasthan, India
Water and nutrient availability for crop production are critical issues in (semi)arid regions. Unsaturated-zone Cl tracer data and nutrient (NO3 and PO4) concentrations were used to quantify recharge rates using the Cl mass balance approach and nutrient availability in the Thar Desert, Rajasthan, India. Soil cores were collected in dune/interdune settings in the arid Thar Desert (near Jaisalmer...
متن کاملTitle : Unique microbial phylotypes in Namib Desert dune and gravel plain
Fairy Circles (FCs) are barren circular patches of soil surrounded by grass species, the origin of which is poorly understood. FCs feature in both the gravel plains and dune fields of the Namib Desert. While a substantial number of hypotheses to explain the origin and/or sustainability of fairy circles have been presented, none are completely consistent with either their properties or distribut...
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ژورنال
عنوان ژورنال: Earth Common Journal
سال: 2012
ISSN: 1929-8706
DOI: 10.31542/j.ecj.69