نتایج جستجو برای: salt glacier

تعداد نتایج: 87303  

2003
Jeremy L. Mennis

Monitoring alpine glacier change has many practical and scientific benefits, including yielding information on glacier-fed water supplies, glacier-associated natural hazards, and climate variability. This paper describes the design and implementation of a spatio-temporal GIS database for monitoring glacier geometry and geometric change. The temporal component of the glacier data is managed thro...

2008
M. Nettles T. B. Larsen P. Elósegui G. S. Hamilton L. A. Stearns A. P. Ahlstrøm J. L. Davis M. L. Andersen J. de Juan S. A. Khan L. Stenseng G. Ekström R. Forsberg

[1] Geodetic observations show several large, sudden increases in flow speed at Helheim Glacier, one of Greenland’s largest outlet glaciers, during summer, 2007. These step-like accelerations, detected along the length of the glacier, coincide with teleseismically detected glacial earthquakes and major iceberg calving events. No coseismic offset in the position of the glacier surface is observe...

2017
Huaining Yang Shiyong Yan Guang Liu Zhixing Ruan

Nine Landsat thematic mapper/enhanced thematic mapper (TM/ETM)+ images from 1998 to 2010 were analyzed to detect variations in the Kuksai Glacier of Mt. Muztagh Ata, western China. The velocities of glacial movement were quantified using the normalized cross-correlation (NCC) method. The surface debris cover of the glacier makes automated glacier outline mapping difficult, but provides useful f...

Journal: :فیزیک زمین و فضا 0
سعید پرنو دانشجوی کارشناسی، گروه ژئوفیزیک، دانشکدۀ مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران ابوالقاسم کامکار روحانی دانشیار بخش مهندس معدن، دانشگاه شاهرود علی رضا عرب امیری استادیار بخش مهندسی معدن، دانشگاه شاهرود نعمت اله کریمی دکتری هواشناسی ماهواره، موسسه تحقیقات آب- پژوهشکده منابع آب تهران

determination of the thickness of a mountains glacier like alamkooh is very difficult due to its extremely cold climate conditions and high elevation, risk of falling large snow segments or balls and coarse topography of the glacier. in this research, due to the transparency of ice for electromagnetic (em) waves, and also, that ground penetrating radar (gpr) method is non-destructive, fast and ...

2017
A. Gilbert M. Dumont J. M. Shea B. K. Pokhrel

In the Everest region, Nepal, ground-based monitoring programmes were started on the debris-free Mera Glacier (27.7 N, 86.9 E; 5.1 km2, 6420 to 4940 m a.s.l.) in 2007 and on the small Pokalde Glacier (27.9 N, 86.8 E; 0.1 km2, 5690 to 5430 m a.s.l., ∼ 25 km north of Mera Glacier) in 2009. These glaciers lie on the southern flank of the central Himalaya under the direct influence of the Indian mo...

2010
Zhen Li Jianmin Zhou Bangsen Tian Jiuliang Liu

The glacier is important factor in climatologic and hydrological investigations. The remote sensing plays an important role on glacier inventorying and monitoring work. SAR systems have an important ability to observe the earth’s surface, independent of cloud conditions. Particularly, the SAR interferometry and polarization provide a useful tool for glacier investigation, such as extraction of ...

2015
Denis VOYTENKO Alon STERN David M. HOLLAND Timothy H. DIXON Knut CHRISTIANSON Ryan T. WALKER Denis Voytenko

We used a terrestrial radar interferometer (TRI) at Helheim Glacier, Greenland, in August 2013, to study the effects of tidal forcing on the terminal zone of this tidewater glacier. During our study period, the glacier velocity was up to 25md. Our measurements show that the glacier moves out of phase with the semi-diurnal tides and the densely packed melange in the fjord. Here detrended glacier...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

یک سری پنج تایی لیگاند چهار دندانه سولفور دهنده: en-bis-dtcna = ethylenebisdithiocarbamate sodium salt pn-bis-dtcna = propylenebisdithiocarbamate sodium salt bu-bis-dtcna = butylenebisdithiocarbamate sodium salt he-bis-dtcna = hexylenebisdithiocarbamate sodium salt oc-bis-dtcna = octylenebisdithiocarbamate sodium salt تهیه شده است. این لیگاندها به روش های ir ,1h-nmr و تجزیه عنصری شن...

2015
F. Brun M. Dumont P. Wagnon E. Berthier M. F. Azam J. M. Shea P. Sirguey A. Rabatel

Few glaciological field data are available on glaciers in the Hindu Kush–Karakoram–Himalayan (HKH) region, and remote sensing data are thus critical for glacier studies in this region. The main objectives of this study are to document, using satellite images, the seasonal changes of surface albedo for two Himalayan glaciers, Chhota Shigri Glacier (Himachal Pradesh, India) and Mera Glacier (Ever...

2009
R. Frauenfelder A. Kääb

Glacier distribution and glacier changes were investigated in the Upper Brahmaputra River Basin using remote sensing and GIS in order to determine the influence of melting glaciers on the long-term runoff of the Brahmaputra River (EU-project BRAHMATINN). Current glacier distribution and glacier changes since the 1970/80s were mapped using multi-temporal optical remote sensing data from the Land...

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