在喜马拉雅中部的冰川激增的表现,使用多时间卫星数据
Vinit Kumar1,2, Ajay Singh Rana1,3, Manish Mehta4,5
1Wadia Institute of Himalayan Geology, Dehradun, 248001, India.
Environmental science and pollution research international
|December 2, 2024
概括
科学家们使用遥感数据在喜马拉雅中部发现了一个罕见的冰川激增. 在2019-2020年期间观察到的这种激增,显示了冰川速度的显著增加,突出显示了高山亚洲冰川的动态行为.
科学领域:
- 冰川学的冰川学
- 气候科学 气候科学
- 遥感 遥感 遥感 遥感
背景情况:
- 高山亚洲 (HMA) 的冰川激增带来了重大危险,但由于数据限制,它们的机制和分布仍然不明.
- 虽然在卡拉科鲁姆和天山等地区记录了潮型冰川,但在喜马拉雅中部地区的详细研究很少.
研究的目的:
- 为了识别和分析在喜马拉雅中部前所未有的冰川激增事件.
- 通过使用多源远程传感数据,调查冲浪动态,包括速度变化和表面升高,使用多源远程传感数据.
主要方法:
- 使用了高分辨率的遥感数据 (CARTOSAT-1,LISS-IV-2A,Landsat,Sentinel) 和数字海拔模型 (SRTM,ASTER,HMA DEM) 进行测量.
- 使用MicMac ASTER (MMASTER) 工具来生成DEM和COSI-Corr程序来计算表面速度.
- 分析了从1993年到2022年的冰川终点波动,表面速度和表面高度变化.
主要成果:
- 在喜马拉雅中部的一个未命名的冰川在2019年9月至10月期间出现了激增,这是三十年来首次出现的.
- 表面速度从静止时的7±3米/年大幅增加到激增时的163±1米/年,每月加速863米.
- 在2000年至2020年期间,平均地表高度变化为0.26±0.2米/年.
结论:
- 该研究提出了对喜马拉雅中部冰川激增的新观察结果,提供了关于该地区激增型冰川行为的关键数据.
- 这些发现有助于更好地了解HMA变化的气候条件下的冰川动态.
- 与全球其他冲浪型冰川的比较有助于讨论潜在的控制机制.
相关概念视频
Global Climate Change
24.2K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.2K
Applications of GIS: Disaster Management and Emergency Response
37
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
37
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
22
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
22


