TY  - Data
T1  - Remote sensing data set of ground deformation in large-scale permafrost area of Qinghai Tibet Plateau (2014-2019)
A1  - chenjie
A1  - wutonghua
DO  - 10.12072/ncdc.NIEER.db0125.2021
PY  - 2021
DA  - 2021-11-16
PB  - National Cryosphere Desert Data Center
AB  - Existing observations and models show that under the background of climate warming, the thickness of permafrost active layer in Qinghai Tibet Plateau increases, the annual average ground temperature rises and the hot-melt karst landform is widely developed. Ground deformation is an important indicator of permafrost degradation. However, at present, the research on ground deformation mostly focuses on the research on small spatial scale, and the spatio-temporal heterogeneity of freezing and thawing process in permafrost area is not considered enough, and the spatial characteristics and control factors of large-scale and large-scale surface deformation are still unclear. Wu Tonghua, a research team of Golmud station, State Key Laboratory of Cryosphere science, Northwest Institute of ecological environment and resources, Chinese Academy of Sciences, developed an InSAR remote sensing inversion method for ground deformation in permafrost areas on a large spatial scale, and applied it to an area of about 140000 square kilometers in the middle of the Qinghai Tibet Plateau. Based on sentinel-1 SAR remote sensing image data and MODIS surface temperature and soil data analysis, this method fully considers the spatio-temporal heterogeneity of freezing and thawing process in permafrost area, and can effectively separate the ground seasonal deformation related to the freezing and thawing process of active layer and the ground long-term deformation caused by thawing of permafrost, The results show that the central Qinghai Xizang Plateau has experienced obvious ground seasonal deformation and long-term deformation. The results can provide reliable technical methods for monitoring the surface deformation of permafrost land in the Qinghai Tibet Plateau and even the Arctic, further deepen the understanding of the relationship between ground deformation, surface freezing and thawing process and permafrost degradation in permafrost areas, and provide important scientific support for pl
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/f17d720f-b765-4342-b11d-f8d81a77f730
ER  -