EGU21-16020, updated on 25 Apr 2021
https://doi.org/10.5194/egusphere-egu21-16020
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Surface velocity variations of glaciers on Kenai Peninsula, Alaska, 2014-2019

Ruitang Yang1,2,4, Regine Hock2, Shichang Kang1,4,3, Donghui Shangguan1, and Wanqin Guo1
Ruitang Yang et al.
  • 1University of Chinese Academy of Sciences, Northwest Institute of Eco-Environment and Resources, CAS, State Key labrotory of Cryospheric Science, China (yrt@lzb.ac.cn )
  • 2Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, USA
  • 3CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China

We characterize the spatiotemporal variations surface velocity of glaciers on the Kenai Peninsula, Alaska, using intensity offset tracking on a set of repeat-pass Sentinel-1 data and TerraSAR-X data. We derived 92 velocity fields and generated time-averaged annual and seasonal surface velocity maps for the period October 2014 to December 2019, as well as time series surface velocity profiles along centerlines for individual glaciers. We find considerable spatial and seasonal variations in surface velocity in the study area, especially a pronounced average spring speedup of 50% averagely compared to annual mean velocity. Ice velocities varied systematically between glaciers with different terminus types. Generally, the pixel-averaged velocity of tidewater and lake-terminating glaciers are up to 2 and 1.5 times greater than those of the land-terminating glaciers, respectively. For Bear glacier, with the analysis of surface velocity profile and the terminus change, we state this glacier retreat and accelerate. While the time-series result shows the velocity speed-up of the Bear glacier synchronizes well with the ice-damaged lake outburst flood (GLOF) events.

How to cite: Yang, R., Hock, R., Kang, S., Shangguan, D., and Guo, W.: Surface velocity variations of glaciers on Kenai Peninsula, Alaska, 2014-2019, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-16020, https://doi.org/10.5194/egusphere-egu21-16020, 2021.

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