气候变化领域集成服务门户(CCPortal): Elevation Models of Antarctica and Greenland derived from CryoSat-2 in the period 2011 to 2013

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.831394
	Elevation Models of Antarctica and Greenland derived from CryoSat-2 in the period 2011 to 2013
	Helm; Veit; Humbert; Angelika; Miller; Heinz
发布日期	2014-04-02
数据集类型	dataset
英文简介	This study focuses on the present-day surface elevation of the Greenland and Antarctic ice sheets. Based on 3 years of CryoSat-2 data acquisition we derived new elevation models (DEMs) as well as elevation change maps and volume change estimates for both ice sheets. Here we present the new DEMs and their corresponding error maps. The accuracy of the derived DEMs for Greenland and Antarctica is similar to those of previous DEMs obtained by satellite-based laser and radar altimeters. Comparisons with ICESat data show that 80% of the CryoSat-2 DEMs have an uncertainty of less than 3 m ± 15 m. The surface elevation change rates between January 2011 and January 2014 are presented for both ice sheets. We compared our results to elevation change rates obtained from ICESat data covering the time period from 2003 to 2009. The comparison reveals that in West Antarctica the volume loss has increased by a factor of 3. It also shows an anomalous thickening in Dronning Maud Land, East Antarctica which represents a known large-scale accumulation event. This anomaly partly compensates for the observed increased volume loss of the Antarctic Peninsula and West Antarctica. For Greenland we find a volume loss increased by a factor of 2.5 compared to the ICESat period with large negative elevation changes concentrated at the west and southeast coasts. The combined volume change of Greenland and Antarctica for the observation period is estimated to be -503 ± 107 km3/yr. Greenland contributes nearly 75% to the total volume change with -375 ± 24 km3/yr.
空间范围	Median Latitude: -9.000000 * Median Longitude: -20.000000 * South-bound Latitude: -90.000000 * West-bound Longitude: -65.000000 * North-bound Latitude: 84.000000 * East-bound Longitude: 0.000000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215511
推荐引用方式 GB/T 7714	Helm,Veit,Humbert,et al. Elevation Models of Antarctica and Greenland derived from CryoSat-2 in the period 2011 to 2013.2014-04-02.https://doi.org/10.1594/PANGAEA.831394.