气候变化领域集成服务门户(CCPortal): A High Resolution; Three-Dimensional View of the D-28 Calving Event From Amery Ice Shelf With ICESat-2 and Satellite Imagery

CCPortal

DOI	10.1029/2020GL091200
	A High Resolution; Three-Dimensional View of the D-28 Calving Event From Amery Ice Shelf With ICESat-2 and Satellite Imagery
	Walker C.C.; Becker M.K.; Fricker H.A.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Tabular calving events occur from Antarctica's large ice shelves only every few decades, and are preceded by rift propagation. We used high-resolution imagery and ICESat-2 data to determine the propagation rates for the three active rifts on Amery Ice Shelf (AIS; T1, T2, and E3) and observe the calving of D-28 on September 25, 2019 along T1. AIS front advance accelerated downstream of T1 in the years before calving, possibly increasing stress at the rift tip. T1 experienced significant acceleration for 12 days before calving, coinciding with a jump in propagation of E3. ICESat-2's high resolution and repeat acquisitions every 91 days allowed for analysis of the ice front before and after calving, and rift detection where it was not visible in imagery as a ∼1 m surface depression, suggesting that it propagates as a basal fracture. Our results show that ICESat-2 can provide process-scale information about iceberg calving. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Automatic identification; Sea ice; Active rifts; Amery Ice Shelf; High resolution; High resolution imagery; Ice shelves; Propagation rate; Rift propagation; Surface depressions; Satellite imagery
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169140
作者单位	Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, La Jolla, San Diego, CA, United States
推荐引用方式 GB/T 7714	Walker C.C.,Becker M.K.,Fricker H.A.. A High Resolution; Three-Dimensional View of the D-28 Calving Event From Amery Ice Shelf With ICESat-2 and Satellite Imagery[J],2021,48(3).
APA	Walker C.C.,Becker M.K.,&Fricker H.A..(2021).A High Resolution; Three-Dimensional View of the D-28 Calving Event From Amery Ice Shelf With ICESat-2 and Satellite Imagery.Geophysical Research Letters,48(3).
MLA	Walker C.C.,et al."A High Resolution; Three-Dimensional View of the D-28 Calving Event From Amery Ice Shelf With ICESat-2 and Satellite Imagery".Geophysical Research Letters 48.3(2021).