气候变化领域集成服务门户(CCPortal): Winter Arctic Sea Ice Thickness From ICESat-2 Freeboards

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DOI	10.1029/2019JC015764
	Winter Arctic Sea Ice Thickness From ICESat-2 Freeboards
	Petty A.A.; Kurtz N.T.; Kwok R.; Markus T.; Neumann T.A.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	National Aeronautics and Space Administration's (NASA's) Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) mission was launched in September 2018 with the primary goal of monitoring our rapidly changing polar regions. The sole instrument onboard, the Advanced Topographic Laser Altimeter System, is now providing routine, very high-resolution, surface elevation data across the globe, including the Arctic and Southern oceans. In this study, we demonstrate our new processing chain for converting the along-track ICESat-2 sea ice freeboard product (ATL10) into sea ice thickness, focusing our initial efforts on the Arctic Ocean. For this conversion, we primarily make use of snow depth and density data from the NASA Eulerian Snow on Sea Ice Model. The coarse resolution (~100 km) snow data are redistributed onto the high-resolution (approximately 30–100 m) ATL10 freeboards using relationships obtained from snow depth and freeboard data collected by NASA's Operation IceBridge mission. We present regional sea ice thickness distributions and highlight their seasonal evolution through our first winter season of data collection. We include ice thickness uncertainty estimates, while also acknowledging the limitations of these estimates. We generate a gridded monthly thickness product and compare this with various monthly sea ice thickness estimates obtained from European Space Agency's CryoSat-2 satellite mission, with ICESat-2 showing consistently lower thicknesses. Finally, we compare our February/March 2019 thickness estimates to ICESat February/March (19 February to 21 March) 2008 ice thickness estimates using the same input assumptions, which show an ~0.37 m or ~20% thinning across an inner Arctic Ocean domain in this 11-year time period. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	altimetry; Arctic; ICESat-2; Sea ice
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186891
作者单位	Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Petty A.A.,Kurtz N.T.,Kwok R.,et al. Winter Arctic Sea Ice Thickness From ICESat-2 Freeboards[J],2020,125(5).
APA	Petty A.A.,Kurtz N.T.,Kwok R.,Markus T.,&Neumann T.A..(2020).Winter Arctic Sea Ice Thickness From ICESat-2 Freeboards.Journal of Geophysical Research: Oceans,125(5).
MLA	Petty A.A.,et al."Winter Arctic Sea Ice Thickness From ICESat-2 Freeboards".Journal of Geophysical Research: Oceans 125.5(2020).