نتایج جستجو برای: technogenic desertification

تعداد نتایج: 2649  

1999
Martin Claussen Claudia Kubatzki Victor Brovkin Andrey Ganopolski Philipp Hoelzmann Hans-Joachim Pachur

Climate variability during the present interglacial, the Holocene, has been rather smooth in comparison with the last glacial. Nevertheless, there were some rather abrupt climate changes. One of these changes, the desertification of the Saharan and Arabian region some 4 6 thousand years ago, was presumably quite important for human society. It could have been the stimulus leading to the foundat...

2018
Jinghe Tao Wenxu Zhang Li Liang Ziqiang Lei

Desertification is the degradation of land in arid and semi-arid areas. Nowadays, lack of water and desertification are extreme problems for plant survival and growth in the arid and semi-arid areas of the world. It becomes increasingly important as to how to let the plant absorb moisture more effectively for keeping growth strong. We synthesized superabsorbent polymers (SAPs) with carbohydrate...

2018

Most of the issues regarding desertification are always related to soil fertility and water quality [1,2]. Hence United Nation Framework Convention on Climate Change (UNFCCC) seriously globalized the issues of desertification in 1992. The developed and developing including hilly mountainous countries are the conference of the parties and so as Nepal [3]. The catchments in hill and Himalayan reg...

Journal: :desert 2011
n. shakerian gh.r. zehtabian h. azarnivand h. khosravi

desertification refers to land degradation phenomenon in arid, semi-arid and dry sub-humid areas, resulting from various factors including climate variation and human activities. for evaluation and mapping of desertification many research have been conducted leading to regional and local models. in this research, among different existing methods imdpa was selected and desertification intensity ...

Journal: :The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2018

Journal: :Forest@ - Rivista di Selvicoltura ed Ecologia Forestale 2005

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