Science Service System

Summary of Proposal HYD2420

TitlePermafrost Monitoring Using the New ModesTerraSAR-X in the Qinghai-Tibet Plateau
Investigator Wang, Chao - Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Key Lab of Digital Earth
Team Members
Prof. Zhang, Hong - Institute of Remote Sensing and Digital Earth, CAS, Key Lab of Digital Earth
Associate Prof. Tang, Yixian - Institute of Remote Sensing and Digital earth, CAS, Key Lab of Digital Earth
Associate Prof. Zhang, Bo - Institute of Remote Sensing and Digital Earth, CAS, Key Lab of Digital Earth
SummaryOur living planet has been undergoing significant changes since the last two centuries. One of the changing components of the Earth’s system is the permafrost in cold regions. The climate warming will cause the thawing and degradation of the permafrost. On the other hand, changes of the permafrost dynamics will affect the carbon pools and fluxes. Investigations of the permafrost changes is one of the efforts scientists are making for better understanding of the processes causing and resulting from the global change. Anthropogenic activities such as railroad construction are another factor disturbing the thermodynamics of the permafrost, and changes of the permafrost will threaten the infrastructure securities. The TerraSAR-X, especially with its new modes, provides scientific community a brand-new tool to investigate the surface changes in permafrost areas in different scales, and support better understanding of our changing earth. The study area of the project is located in the permafrost areas on the Qinghai-Tibet plateau. The Wide ScanSAR mode TerraSAR-X products are used to measure the seasonal surface deformation of the permafrost in regional scales. The Staring Spotlight mode TerraSAR-X products are used to measure niche deformations of railroad base in 4 sites along the Qinghai-Tibet railroad. The Single Polarization Stripmap Products (SM) are used in key sites to fill the scale gap of the new modes. The small baseline differential InSAR (SB D-InSAR) technique will be used to process the TerraSAR-X data. Atmospheric correction method will be developed for processing of the Wide ScanSAR data using auxiliary data. Field campaigns will be performed in 2014 and 2015, including GPS measurements and change validation. Relations will be analyzed between the surface changes of the permafrost, railroad base changes, and temperature fluctuation. The project will be executed from 2014. 3 to 2016.8, including field investigations, reporting of preliminary results, and final report. The data acquisition is planned to start from Jul. 2014. The anticipated results are: 1) the seasonal variation observations of surface deformation in the permafrost areas in large scales, 2) the railroad base deformation observation in the permafrost areas, 3) Analysis of the relationship of surface changes in the permafrost areas observed in different scales.

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