气候变化领域集成服务门户(CCPortal): Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis

CCPortal

DOI	10.5194/tc-8-915-2014
	Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis
	Brucker L.; Dinnat E.P.; Koenig L.S.
发表日期	2014
ISSN	19940416
卷号	8 期号:3
英文摘要	Following the development and availability of Aquarius weekly polar-gridded products, this study presents the spatial and temporal radiometer and scatterometer observations at L band (frequency ∼1.4 GHz) over the cryosphere including the Greenland and Antarctic ice sheets, sea ice in both hemispheres, and over sub-Arctic land for monitoring the soil freeze/thaw state. We provide multiple examples of scientific applications for the L-band data over the cryosphere. For example, we show that over the Greenland Ice Sheet, the unusual 2012 melt event lead to an L-band brightness temperature (TB) sustained decrease of ∼5 K at horizontal polarization. Over the Antarctic ice sheet, normalized radar cross section (NRCS) observations recorded during ascending and descending orbits are significantly different, highlighting the anisotropy of the ice cover. Over sub-Arctic land, both passive and active observations show distinct values depending on the soil physical state (freeze/thaw). Aquarius sea surface salinity (SSS) retrievals in the polar waters are also presented. SSS variations could serve as an indicator of fresh water input to the ocean from the cryosphere, however the presence of sea ice often contaminates the SSS retrievals, hindering the analysis. The weekly grided Aquarius L-band products used are distributed by the US Snow and Ice Data Center at http://nsidc.org/ data/aquarius/index.html , and show potential for cryospheric studies. © 2014 Author(s).
学科领域	cryosphere; ice cover; ice sheet; marine ecosystem; polar region; radar imagery; salinity; Arctic; Greenland; Greenland Ice Sheet
语种	英语
scopus关键词	cryosphere; ice cover; ice sheet; marine ecosystem; polar region; radar imagery; salinity; Arctic; Greenland; Greenland Ice Sheet
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120111
作者单位	NASA GSFC, Cryospheric Sciences Laboratory, Code 615, Greenbelt, MD 20771, United States; Universities Space Research Association, Goddard Earth Sciences Technology and Research Studies and Investigations, Columbia, MD 21044, United States; Chapman University, School of Earth and Environmental Sciences, Orange, CA 92866, United States
推荐引用方式 GB/T 7714	Brucker L.,Dinnat E.P.,Koenig L.S.. Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis[J],2014,8(3).
APA	Brucker L.,Dinnat E.P.,&Koenig L.S..(2014).Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis.Cryosphere,8(3).
MLA	Brucker L.,et al."Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis".Cryosphere 8.3(2014).