Results 61 to 70 of about 977,525 (304)

Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales

Nature Communications, 2022
Factors driving ice flow variability in Greenland vary by timescale. At seasonal scale, Helheim Glacier ice velocity responds most strongly to meltwater runoff. Glacier terminus position drives velocity variability at longer time scales.
Lizz Ultee, Denis Felikson, Brent Minchew, Leigh A. Stearns, Bryan Riel   +4 more
doaj   +1 more source

Spatio-Temporal Distribution of Supra-Glacial Ponds and Ice Cliffs on Verde Glacier, Chile

Frontiers in Earth Science, 2021
Known for their important role in locally enhancing surface melt, supraglacial ponds and ice cliffs are common features on debris-covered glaciers. We use high resolution satellite imagery to describe pond-cliff systems and surface velocity on Verde ...
Thomas Loriaux, Lucas Ruiz
doaj   +1 more source

Transposable Element–Driven PIEZO Mutation Enhances Locust Flight in Plateau Hypoxia

Advanced Science, EarlyView.
Why transposable elements (TEs) persisted or expanded in genomes remains a mystery. Using integrated analysis of TE macro‐ and microevolution in locusts, our results showed that thousands of TE insertions promoted widespread adaptive variation. Subfamilies of candidate adaptive TEs amplified and reshaped species‐level genomic architecture.
Xuanzhao Li, Ying Liu, Longsheng Xing, Xianliang Huang, Yingming Sun, Lei Yue, Yuze Zhang, Huilong Du, Bing Chen   +8 more
wiley   +1 more source

Including debris cover effects in a distributed model of glacier ablation [PDF]

, 2012
Distributed glacier melt models generally assume that the glacier surface consists of bare exposed ice and snow. In reality, many glaciers are wholly or partially covered in layers of debris that tend to suppress ablation rates.
Reid, Tim, Carenzo, Marco, Brock, Benjamin, Pellicciotti, Francesca   +3 more
core   +1 more source

Groundwater Rise Sustains the World's Largest Alpine Water System Under Global Warming

Advanced Science, EarlyView.
Shallow groundwater depth (SGWD) across the non‐permafrost plains of the Qinghai–Xizang Plateau decreased at averagely 0.02 m year−1, adding 31.44 Gt of freshwater storage from 2000 to 2020 and sustaining ∼53 500 km2 of alpine ecosystems. A vadose‐zone capacity of 426.6 Gt reveals these aquifers as promising reservoirs, highlighting groundwater's ...
Jianqing Du, Zhixiang Niu, Yanfen Wang, Shirui Zhou, Youqing Yang, Xiang Wei, Haishan Niu, Yitao Zhang, Anquan Xia, Yali Liu, Yanbin Hao, Kai Xue, Bingfang Wu, Xinquan Zhao, Tandong Yao, Yiyu Chen   +15 more
wiley   +1 more source

Recovery of Petermann Glacier Velocity from SAR Imagery Using a Spatiotemporal Hybrid Neural Network

Applied Sciences
Numerous studies have demonstrated the potential of Synthetic Aperture Radar (SAR) in monitoring glacier velocity. However, owing to the complex dynamics of glaciers and the variability of their surface features, velocity fields derived from even short ...
Zongze Li, Haimei Mo, Lebao Yang, Jinsong Chong   +3 more
doaj   +1 more source

Grain Boundary Structure Ordering via Electroshock Treatment Enhances Strength‐Ductility Synergy

Advanced Science, EarlyView.
Electroshock treatment triggers atomic rearrangement, transforming disordered grain boundaries into ordered states without inducing recrystallization. This grain boundary ordering effectively relieves strain concentration and strengthens boundaries, enabling a simultaneous improvement in both strength and ductility.
Jiancheng Chen, Feng Wang, Dongsheng Qian, Huiling Wang, Jinsong Wu, Mingwang Fu, Lin Hua   +6 more
wiley   +1 more source

Debris Emergence Elevations and Glacier Change

Frontiers in Earth Science, 2021
Debris-covered glaciers represent potentially significant stores of freshwater in river basins throughout High Mountain Asia (HMA). Direct glacier mass balance measurements are extremely difficult to maintain on debris-covered glaciers, and optical ...
Joseph M. Shea, Philip D. A. Kraaijenbrink, Walter W. Immerzeel, Fanny Brun   +3 more
doaj   +1 more source

Annual and Seasonal Variations in Glacier Velocity, and Surging Glaciers in the West Kunlun Mountain

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Monitoring glacier velocity is crucial for revealing glacier dynamics and clarifying the responses of glaciers to climate change. The West Kunlun mountain (WKM) is at the center of the Karakoram Anomaly; however, insufficient systematic studies have been conducted to determine glacier velocities in this region.
Zhao Zhang, Ninglian Wang, Yuwei Wu 0004, Sugang Zhou, Gexia Qin   +4 more
openaire   +2 more sources

Testing hypotheses of the cause of peripheral thinning of the Greenland Ice Sheet: is land-terminating ice thinning at anomalously high rates? [PDF]

, 2008
Recent observations have shown that the periphery of the Greenland ice sheet (GrIS) is thinning rapidly and that this thinning is greatest around marine-terminating outlet glaciers. Several theories have been proposed which provide a link between climate
Krabill, W, Nienow, P, Payne, AJ, Bamber, JL, T. Payne, Bamber, J., J. Bamber, Sole, A., Payne, T., A. Sole, Sole, AJ, Krabill, W., P. Nienow, W. Krabill, Nienow, P.   +14 more
core   +2 more sources