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| 1 | 全球变暖背景下青藏高原及周边地区冰川变化的时空格局与趋势及影响显示文摘作为“亚洲水塔”重要组成部分的冰川,对气候变化的响应极其敏感。研究全球变暖背景下青藏高原及周边地区冰川变化的时空格局特征,有助于识别“亚洲水塔”的主要储水与供水区域,这对水资源的合理规划与利用具有重要意义。文章通过综合分析,揭示出“喀喇昆仑异常”现象在昆仑山西部和帕米尔高原地区亦有不同程度的表现,分布在这些区域以外的青藏高原及周边地区山地冰川近期大多处于加速消融状态;同时,阐明了近50年来以及未来不同气候变化情景下青藏高原及周边地区冰川变化对流域水资源状况和海平面上升的影响;并指出,要系统开展青藏高原及周边地区冰川的调查与观测,建立气候-冰川-水文过程耦合模型,准确评估变化环境下的冰川水资源状况及其影响,以服务于中国社会经济发展和“绿色丝绸之路”建设。 | 王宁练 姚檀栋 徐柏青 陈安安 王伟财 | 2019 | 中国科学院院刊2019,34,11: | 50 |
| 2 | 新疆帕米尔跃动冰川遥感监测研究显示文摘2015年5月,新疆克孜勒苏柯尔克孜自治州阿克陶县公格尔九别峰北坡克拉牙依拉克冰川发生跃动,造成草场和部分房屋被冰体淹没,本文针对这一冰川跃动事件的发生过程进行研究.利用2013-2015年间ASTER立体像对数据监测了克拉牙依拉克冰川的冰川表面高程的变化,并利用2015年4月13日至2015年7月11日期间的Landsat OLI数据监测了冰川的表面运动速度变化.监测发现,克拉牙依拉克冰川从2015年4月13号开始活动强烈,表面运动速度呈加快趋势,2015年5月8-15日期间冰川表面运动速度达到最高水平,其最大运动速度在西支中部达到了(20.40±0.42)m·d^(-1),冰川跃动达到顶峰.冰川跃动'积蓄区'位于西支冰川平衡线以下区域,跃动向下游接收区输送冰体体积约为2.4×10~8m^3,大量冰体堆积在东西支汇合口地段(海拔3 100~3 500 m),造成了该处冰面隆起,其中最大隆起高度为(130.58±0.70)m.本文获得了西支冰川由静止期、跃动状态、恢复到稳定状态期间的冰面高程和表面运动速度变化,为本地区冰川跃动机理的研究奠定了基础. | 张震 刘时银 魏俊锋 蒋宗立 许君利 郭万钦 | 2016 | 冰川冻土2016,38,1: | 28 |
| 3 | 高亚洲冰川区SRTM C-波段DEM数据透射深度研究显示文摘SRTM数据是研究冰量变化的重要数据之一。基于SRTM C-波段和X-波段的高程数据,对高亚洲不同冰川区SRTM C-波段数据的透射深度进行了研究。结果表明:高亚洲地区SRTMC透射深度的空间分布特征存在较大差异,其中藏色岗日地区的透射深度最大为(5.3±2.1)m,中天山和念青唐古拉西段地区的透射深度最小仅为(0.8±0.6)m。透射深度整体空间分布呈由高亚洲边缘地区向青藏高原内陆先减小后增大,到羌塘高原地区SRTMC的透射深度最大的趋势。气温和降水量的空间差异共同作用是导致SRTMC透射深度呈上述分布状况的主要因素。此外,SRTM X-波段数据的覆盖状况和冰川样本数量的选择会导致不同研究估算出的SRTMC透射深度存在不确定性。 | 陈安安 李真 贺建桥 郭忠明 张伟 | 2018 | 冰川冻土2018,40,1: | 4 |
| 4 | 高亚洲冰川区度日因子空间分布数据集显示文摘基于冰雪消融与气温之间线性关系建立的度日模型是冰川研究中应用较为广泛的模型。度日因子是该模型的重要参数,反映了单位正积温产生的冰雪消融量,其空间变化对于该模型模拟冰雪消融过程的精度影响较大。然而,高亚洲地区有长期观测的冰川数量较少,无法为应用度日模型开展区域冰川消融模拟提供必要的参数。本研究基于高亚洲不同地区40余条冰川的考察和观测资料,构建了冰川冰与雪度日因子的转换公式,获取了高亚洲冰川区度日因子的空间分布格网数据集(GeoTIFF格式,32位浮点型),空间分辨率为0.5°,同时本数据精度已在典型区域的冰川物质平衡模拟应用中得到了验证。本数据集可为开展高亚洲区域冰川消融过程及其对水资源变化与相关灾害影响研究提供模型参数,为进一步分析高亚洲地区冰川变化与气候变化、水资源变化及其灾害效应提供必要的数据支撑。 | 张勇 刘时银 王欣 | 2019 | 中国科学数据(中英文网络版)2019,4,3: | 1 |
| 5 | Thickness estimation of the Longbasaba Glacier:methods and application显示文摘A total of 71,177 glaciers exist on the Qinghai-Tibet Plateau,according to the Randolph Glacier Inventory(RGI 6.0).Despite their large number,glacier ice thickness data are relatively scarce.This study utilizes digital elevation model data and ground-penetrating radar thickness measurements to estimate the distribution and variation of ice thickness of the Longbasaba Glacier using Glacier bed Topography(GlabTop),a full-width expansion model,and the Huss and Farinotti(HF)model.Results show that the average absolute deviations of GlabTop,the full-width expansion model,and the HF model are 9.8,15.5,and 10.9 m,respectively,indicating that GlabTop performs the best in simulating glacier thickness distribution.During 1980−2015,the Longbasaba Glacier thinned by an average of 7.9±1.3 m or 0.23±0.04 m/a,and its ice volume shrunk by 0.28±0.04 km3 with an average reduction rate of 0.0081±0.0001 km^3/a.In the investigation period,the area and volume of Longbasaba Lake expanded at rates of 0.12±0.01 km^2/a and 0.0132±0.0018 km3/a,respectively.This proglacial lake could potentially extend up to 5,000 m from the lake dam. | GuangLi He JunFeng Wei Xin Wang | 2020 | Research in Cold and Arid Regions2020,12,6: | 1 |
| 6 | Moraine-dammed glacial lake changes during the recent 40 years in the Poiqu River Basin,Himalayas显示文摘Glacier retreat is not only a symbol of temperature and precipitation change, but a dominating factor of glacial lake changes in alpine regions, which are of wide concern for high risk of potential outburst floods. Of all types of glacial lakes, moraine-dammed lakes may be the most dangerous to local residents in mountain regions. Thus, we monitored the dynamics of 12 moraine-dammed glacial lakes from 1974 to 2014 in the Poiqu River Basin of central west Himalayas, as well as their associated glaciers with a combination of remote sensing, topographic maps and digital elevation models(DEMs). Our results indicate that all monitored moraine-dammed glacial lakes have expanded by 7.46 km2 in total while the glaciers retreated by a total of 15.29 km2 correspondingly. Meteorological analysis indicates a warming and drying trend in the Nyalam region from 1974 to 2014, which accelerated glacier retreat and then augmented the supply of moraine-dammed glacial lakes from glacier melt. Lake volume and water depth changed from 1974 to 2014 which indicates that lakes Kangxico, Galongco, and Youmojanco have a high potential for outburst floods and in urgent need for continuous monitoring or artificial excavation to release water due to the quick increase in water depths and storage capacities. Lakes Jialongco and Cirenmaco, with outburst floods in 1981 and 2002, have a high potential risk for outburst floods because of rapid lake growth and steep slope gradients surrounding them. | XiuJuan Zhang ShiYin Liu Li Liu | 2015 | Research in Cold and Arid Regions2015,7,6: | 0 |
| 7 | Impact of glacier shape on the mass balance changes:A case study of Dongkemadi region,central Tibetan Plateau显示文摘The morphology of glacier is a key factor impacting the glacier mass redistributions.High-resolution digital elevation models(DEMs)provide a reliable method to explore the vertical characteristics of glacier surface elevation changes in different types.Using topographic maps from 1969 and Shuttle Radar Topography Mission(SRTM)data acquired in 2000,we calculated the surface elevation changes for 18 glaciers to generate vertical profiles of elevation difference(VPED)in the Dongkemadi region,central Tibetan Plateau.The results showed that the VPHDs vary highly among different glacier types.For valley glaciers,surface thinning at middle elevations is less than that at higher and lower elevations;for cirque glaciers,however,the maximum surface decline occurred in the middle section;whereas hanging glaciers experienced progressively less surface lowering with increasing elevation.Glacier geometry directly affects ice dynamics,which in turn dictates the VPEDs of specific glaciers.This regulation of glacier evolution can be applied to project how valley glaciers might eventually assume the VPEDs of cirque and hanging glaciers due to ongoing warming. | CHEN An-An WANG Ning-Lian WU Yu-Wei ZHANG Quan GUO Zhong-Ming | 2020 | Advances in Climate Change Research2020,11,1: | 0 |
| 8 | 山地冰川中流线自动提取方法研究显示文摘冰川是冰冻圈的重要组成部分,被誉为气候变化的“指示器”和“预警器”。而冰川中流线则是反映冰川几何形态的关键参数之一,是确定冰川长度随时间变化、分析冰川运动速度场和估算冰川体积等的一个重要参量。本文基于泰森多边形法,结合冰川表面地形特征,从形态学角度提出了一种山地冰川中流线自动化快速提取的新方法。本方法根据数字高程模型数据分别以冰川矢量边界线上局部最高点和最低点为起始点和终点,并结合提取冰川中心线的方法提取冰川的中流线。将本方法应用于青藏高原1014条山地冰川中,自动生成了相应的冰川中流线2114条,提取成功率为100%。通过将本文所提方法与Kienholz方法所提取的冰川中流线的平均长度进行比较,发现本文方法和Kienholz方法所提取冰川中流线的平均长度比为0.98,具有很高的一致性。另外,对于不同类型冰川的中流线提取,我们引入了Zhang方法和Kienholz方法与本文方法的提取结果进行了对比,结果表明本方法提取结果覆盖更全。本文所提方法可基于冰川编目数据中的冰川矢量边界线数据和数字高程模型数据,在无人工参与的情况下,实现对冰川中流线的自动化快速提取。 | 张一新 周建民 桑文刚 李震 黄磊 鲁安新 | 2023 | 冰川冻土2023,45,4: | 0 |