DOI: 10.5194/tc-8-915-2014
Scopus记录号: 2-s2.0-84901255059
论文题名: Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis
作者: Brucker L ; , Dinnat E ; P ; , Koenig L ; S
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 3 起始页码: 915
结束页码: 930
语种: 英语
英文关键词: cryosphere
; ice cover
; ice sheet
; marine ecosystem
; polar region
; radar imagery
; salinity
; Arctic
; Greenland
; Greenland Ice Sheet
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). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74846
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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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
Recommended Citation:
Brucker L,, Dinnat E,P,et al. Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions-Part 2: Initial product analysis[J]. Cryosphere,2014-01-01,8(3)