Publications

Li, RX; Lv, D; Xie, H; Tian, YX; Xu, Y; Lu, SS; Tong, XH; Weng, HX (2021). A comprehensive assessment and analysis of Antarctic satellite grounding line products from 1992 to 2009. SCIENCE CHINA-EARTH SCIENCES, 64(8), 1332-1345.

Abstract
In this paper, we present the results of a comprehensive assessment and analysis of five major Antarctic grounding line (GL) products from remote sensing data. The systematic assessment of this large amount of GL data was performed using a new two-step framework and implementation strategy, in which 84.4% of the product data were processed effectively by using a set of developed assessment metrics, with the remaining 15.6% handled by a comprehensive manual processing procedure aided by additional multisource data. The radar GL product shows a high quality (inconsistency of 0.3%) and is recommended for use wherever available. Meanwhile, the optical image GL products show a lower quality (inconsistency of 3-12%) but offer complete coverage, particularly in areas of weak tides. The GL analysis based on the assessed products (1992-2009) showed that 9.5% of the entire Antarctic GL were retreating or advancing, classified as a dynamic state. At the basin scale, the highest retreat rate was -1544 +/- 51 m a(-1) in Basin 22 (including Pine Island Glacier) and the highest advancement rate was 304 +/- 16 m a(-1) in Basin 14 (including Mertz Glacier). The West Antarctic Ice Sheet (WAIS) and the East Antarctic Ice Sheet (EAIS) showed the average GL change rates of -370 +/- 8 m a(-1) and 5 +/- 7 m a(-1), respectively, indicating that there was a clear trend of GL retreat in WAIS and a balanced to slightly advanced GL state in EAIS (except for the region around Totten).

DOI:
10.1007/s11430-020-9729-6

ISSN:
1674-7313