57-Year Ice Velocity Dynamics in Byrd Glacier Based on Multisource Remote Sensing Data

Long time series glacier ice velocity reflects the local climate changes and can be used to estimate mass balance (MB) changes, which is a critical parameter for understanding of glacier-climate interactions prediction sea level rise. However, due difficulty in image matching caused by poor-quality historical satellite images, there was insufficient data before 1999. Here, we proposed multiple-constraint dense approach mapping based on early images from ARGON, Landsat-1, Landsat-4/5. We successfully applied this method Byrd Glacier generate its maps 1963 Additionally, 2000 2014 were generated IMCORR software using Landsat-7, Landsat-8 images. Combining with Global Land Ice Velocity Extraction (GoLIVE) dataset since 2014, obtained 57 years. Our results showed that experienced slight fluctuations velocity, may not calving events studied portion Ross Shelf (RIS) or air temperature but activity subglacial drainage systems. Furthermore, positive MB (average rate 2.6 ± 2.0 Gt/y) 2020, indicating global change have limited impact it.