Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8866589 | Remote Sensing of Environment | 2018 | 17 Pages |
Abstract
In the context of global warming, glacier changes in the Qinghai-Tibet Plateau (QTP) and its surroundings have attracted a great amount of public attention. To date, there have been many studies of glacier mass balance across the QTP. However, given that most of the previous studies have focused on a short observation period (2000-2015), and that long-term mass change measurements are available only for some local regions, we utilized declassified KH-9 images and 1 arc-second Shuttle Radar Topography Mission (SRTM) digital elevation models (DEMs) to provide the region-wide mass balance (from the mid-1970s to 2000) for a larger scale (including 11 sample regions) across the QTP and its surroundings. The final results indicate that the glaciers in the northwest of the QTP have shown a less negative or near-zero mass balance, ranging from â0.11â¯Â±â¯0.13â¯m w.e. aâ1 to 0.02â¯Â±â¯0.10â¯m w.e. aâ1, compared to those in the southeast part, with a mass balance range of â0.30â¯Â±â¯0.12â¯m w.e. aâ1 to â0.11â¯Â±â¯0.14â¯m w.e. aâ1. The most serious mass loss has emerged in the central-eastern Himalaya. Integrating our results with the observations after 2000 suggests that, over the past four decades (mid-1970s to the mid-2010s), the glaciers in the Himalaya, Nyainqêntanglha, and Tanggula mountains, as a whole, have exhibited accelerated mass loss, and the most significant acceleration has occurred in the eastern Nyainqêntanglha. Moreover, the Hindu Raj glaciers have shown a stable rate of continuous mass loss, while a nearly stable or slight mass gain state in the western Kunlun region can be dated back to at least as far as the mid-1970s.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Computers in Earth Sciences
Authors
Yushan Zhou, Zhiwei Li, Jia Li, Rong Zhao, Xiaoli Ding,