期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Variations of Laohugou Glacier No.12 in the western Qilian Mountains, China, from 1957 to 2015 被引量:14
1
作者 LIU Yu-shuo QIN Xiang +4 位作者 CHEN Ji-zu LI Zhen-lin WANG Jing DU Wen-tao GUO Wan-qin 《Journal of Mountain Science》 SCIE CSCD 2018年第1期25-32,共8页
Glaciers were solid reservoirs and important water resources in western China,but they were retreating significantly in context of global warming.Laohugou Glacier No.12 was the largest valley glacier in Qilian Mountai... Glaciers were solid reservoirs and important water resources in western China,but they were retreating significantly in context of global warming.Laohugou Glacier No.12 was the largest valley glacier in Qilian Mountains.In this study,realtime kinematic(RTK)data,topographic map and World View-2 satellite imagery were used to measure changes in terminus,extent and volume of Laohugou Glacier No.12.Results showed that Laohugou Glacier No.12 was shrinking significantly since 1957.From1960 to 2015,the terminus reduction of Laohugou Glacier No.12 was 402.96 m(3.99%)in total,and glacier length decreased to 9.7 km from 10.1 km.Reduction of glacier area and volume were the most obvious.From 1957 to 2015,glacier area and volume decreased by 1.54 km^2(7.03%)and 0.1816 km^3,respectively.Reduction trend of terminus and area was slowing in 1950-1980s,even stable for a period in the mid-1980s,and then accelerated.Ice core analysis result and nearly meteorological station data shown an increasing trend of temperature in 1957-2015,it was a main reason of continuous retreating of Laohugou Glacier No.12. 展开更多
关键词 glacier changes laohugou glacier No.12 Qilian Mountains Real-time kinematic Remote sensing image
下载PDF
The movement features analysis of Laohugou Glacier No.12 in Qilian Mountains 被引量:3
2
作者 YuShuo Liu Xiang Qin WenTao Du WeiJun Sun DianJiong Hou 《Research in Cold and Arid Regions》 2011年第2期119-123,共5页
The Laohugou Glacier No. 12 is the largest valley glacier in Qilian Mountains, which is located in northem Qinghai-Tibet Plateau. Movement is the basic characteristic of glaciers, and is also an important distinction ... The Laohugou Glacier No. 12 is the largest valley glacier in Qilian Mountains, which is located in northem Qinghai-Tibet Plateau. Movement is the basic characteristic of glaciers, and is also an important distinction from other terrestrial natural ice. Glacier changes not only reflect climate change, but also play an important role in humanity society. In the arid regions of western China, glaciers are becoming an important water source. We use the GPS receiver (South-Lingrui $82) as data platform with the aid of RTK measurement technology to observe the surface velocity of Laohugou Glacier No. 12. Surface velocity data shows that the maximum value appears at an altitude of 4,750-4,850 m during the period of 2008-2009. During this period, the west branch surface velocity reached 32.6 m per year at an altitude near 4,830 m, the east branch surface velocity reached 32.4 m per year at the altitude near 4,770 m. Comparing the surface velocity data during 2008-2009 with observation results in 1959, the glacier velocity slowed down about 11%. 展开更多
关键词 laohugou glacier No. 12 GPS glacier movement surface velocity
下载PDF
Source of major ions from an ice core of the No.12 Glacier in Laohugou Valley,Qilian Mountain 被引量:1
3
作者 XiaoQing Cui JiaWen Ren +5 位作者 Xiang Qin WenTao Du WeiJun Sun GuangMingYu XiaoXiang Wang WeiZhen Sun 《Research in Cold and Arid Regions》 2010年第6期522-528,共7页
In June 2006,a 20.12 m shallow ice core was recovered from an elevation of 5,040 m in the northern branch firn basin of No.12 Glacier,Great Snow Mountain,in the western part of Qilian Mountain,China.Isotopes(δ 18 O),... In June 2006,a 20.12 m shallow ice core was recovered from an elevation of 5,040 m in the northern branch firn basin of No.12 Glacier,Great Snow Mountain,in the western part of Qilian Mountain,China.Isotopes(δ 18 O),major soluble ions,and radionuclide(β-activity) measurements from the ice core revealed a 46-year record(1960-2006).In this paper,the method of sea-salt ion tracer,correlation analysis and trend analysis were used in this research to confirm the source of the chemical composition.The correlation analysis and HYSPLIT backward trajectory analysis suggests that atmospheric soluble dust species dominate the chemical signature. 展开更多
关键词 ice core SOURCE the No.12 glacier at laohugou IONS Qilian Mountain
下载PDF
Chemical Characteristics and Environmental Records of a Snow-Pit at the Glacier No.12 in the Laohugou Valley, Qilian Mountains 被引量:4
4
作者 Xiaoqing Cui Jiawen Ren +4 位作者 Xiang Qin Weijun Sun Guangming Yu Zebin Wang Weigang Liu 《Journal of Earth Science》 SCIE CAS CSCD 2014年第2期379-385,共7页
In June 2006, samples were collected from a 90 cm snow-pit at an elevation of 5 040 m a.s.l, in the northern branch firn basin of the Glacier No. 12, Laohugou Valley, in the western part of Qilian Mountain, China. Oxy... In June 2006, samples were collected from a 90 cm snow-pit at an elevation of 5 040 m a.s.l, in the northern branch firn basin of the Glacier No. 12, Laohugou Valley, in the western part of Qilian Mountain, China. Oxygen isotopes (6180) and major soluble ions were measured. Results showed that Ca2+ is the dominant cation, and SO42 is the dominant anion. All major ions have close positive correlations with eachother except NO3 and NH4+. 6180 show positive correlation with air temperature. The method of correlation analysis, sea-salt ion tracer and trend analysis were used to determine the source of the chemical components. The correlation analysis and HYSPLIT backward trajectory analysis suggest that atmospheric soluble dust species dominate the chemical signature. 展开更多
关键词 snow-pit glaciochemistry glacier No. 12 at laohugou ion Qilian Mountain.
原文传递
CH_(4) and C0_(2) observations from a melting high mountain glacier,Laohugou Glacier No.12 被引量:1
5
作者 Zhi-Heng DU Lei WANG +9 位作者 Zhi-Qiang WEI Jing-Feng LIU Peng-Lin LIN Jia-Hui LIN Yan-Zhao LI Zi-Zhen JIN Ji-Zu CHEN Xiao-Xiang WANG Xiang QIN Cun-De XIAO 《Advances in Climate Change Research》 SCIE CSCD 2022年第1期146-155,共10页
With global warming,glaciers in the high mountains of China are retreating rapidly.However,few data have been reported on whether greenhouse gases from these glaciers are released into the atmosphere or absorbed by gl... With global warming,glaciers in the high mountains of China are retreating rapidly.However,few data have been reported on whether greenhouse gases from these glaciers are released into the atmosphere or absorbed by glacial meltwater.In this study,we collected meltwater and ice samples from Laohugou Glacier No.12 in western China and measured CH_(4)and CO_(2)concentrations.Meltwater from the glacier terminus was continually sampled between 3 and 5 August 2020 to measure CH_(4)and CO_(2)concentrations.The results demonstrated that meltwater is a source of CH_(4)because the average saturations are over 100%.It could be con eluded that CH_(4)in the atmosphere can be released by glacial meltwater.However,the CO_(2)saturations are various,and CO_(2)fluxes exhibit positive(released CO_(2))or negative(absorbed CO_(2))values because the water and atmospheric conditions are variable.More importantly,the CH_(4)and CO_(2)concentrations were higher in meltwater samples from the glacier terminus than in samples from the surface ice(including an ice core)and a surface stream.Although the meltwater effect from the upper part of the glacier cannot be excluded,we speculated that subglacial drainage systems with an anaerobic environment may represent the CH_(4)source,but it needs to be further investigated in the future.However,high mountain glaciers are currently ignored in global carbon budgets,and the increased melting of glaciers with global warming may accelerate the absorption of much more CO_(2)and lead to the release of CH_(4). 展开更多
关键词 CO_(2) CH_(4) Source and sink:Subglacial drainage systems laohugou glacier No.12
原文传递
Variations of the alpine precipitation from an ice core record of the Laohugou glacier basin during 1960-2006 in western Qilian Mountains, China 被引量:6
6
作者 QIN Xiang CUI Xiaoqing +3 位作者 DU Wentao DONG Zhiwen REN Jiawen CHEN Jizu 《Journal of Geographical Sciences》 SCIE CSCD 2015年第2期165-176,共12页
The net accumulation record of ice core is one of the most reliable indicators for reconstructing precipitation changes in high mountains. A 20.12 m ice core was drilled in 2006 from the accumulation zone of Laohugou ... The net accumulation record of ice core is one of the most reliable indicators for reconstructing precipitation changes in high mountains. A 20.12 m ice core was drilled in 2006 from the accumulation zone of Laohugou Glacier No.12 in the northeastern Tibetan Plateau, China. We obtained the precipitation from the ice core net accumulation during 1960-2006, and found out the relationship between Laohugou ice core record and other data from surrounding sites of the northeastern Tibetan Plateau. Results showed that during 1960-2006, the precipitation in the high mountains showed firstly an increasing trend, while during 1980 to 2006 it showed an obvious decreasing trend. Reconstructed precipitation change in the Laohugou glacier basin was consistent with the measured data from the nearby weather stations in the lower mountain of Subei, and the correlation coefficient was 0.619 (P〈0.001). However, the precipitation in the high mountain was about 3 times more than that of the lower mountain. The precipitation in Laohugou Glacier No.12 of the western Qilian Mountains corresponded well to the net accumulation of Dunde ice core during the same period, tree-ring reconstructed precipitation, the measured data of multiple meteorological stations in the northeastern Tibetan Plateau, and also the changes of adjacent PDSI drought index. Precipitation changes of the Laohugou glacier basin and other sites of the northeastern Tibetan Plateau had significantly positive correlation with ENSO, which implied that the regional alpine precipitation change was very likely to be influenced by ENSO. 展开更多
关键词 alpine precipitation ice core laohugou glacier No.12 Qilian Mountains
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部