| DOI: | 10.1002/2014GL060993
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| 论文题名: | Simulated effects of a snow layer on retrieval of CryoSat-2 sea ice freeboard |
| 作者: | Kwok R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9943
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| EISSN: | 1944-9674
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| 出版年: | 2014
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| 卷: | 41, 期:14 | | 起始页码: | 5014
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| 结束页码: | 5020
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| 语种: | 英语
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| 英文关键词: | Arctic Ocean
; CryoSat-2
; sea ice freeboard
; snow layer
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| Scopus关键词: | Meteorological instruments
; Snow
; Snowfall measurement
; Arctic ocean
; CryoSat-2
; Interferometric radars
; Propagation speed
; Range resolution
; Relative scattering
; Snow layer
; Tracking approaches
; Sea ice
; CryoSat-2
; ice sheet
; ice thickness
; parameterization
; radar altimetry
; simulation
; snow cover
; waveform analysis
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| 英文摘要: | The impact of a snow layer on the location of the tracking point (RP) for ranging to the sea ice surface in CryoSat-2 synthetic aperture interferometric radar altimeter waveforms is simulated. With a range resolution of ~47 cm, the response of the air-snow (a-s) interface broadens the response of the snow-ice (s-i) interface and displaces the RP toward the altimeter. This effect is largest when the strengths of their returns are comparable and when snow thicknesses are >20 cm. On the other hand, the RP is displaced away from the altimeter when the reduced propagation speed in the snow layer is not accounted for. This analysis examines the dependence of these competing corrections on snow thickness and the relative scattering strengths of the interfaces and the sensitivity of two different tracking approaches (leading edge and centroid) to these snow parameters. Expected errors depend on a better understanding of the relative scattering strengths of the interfaces and snow layer. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904273885&doi=10.1002%2f2014GL060993&partnerID=40&md5=93ceb337874f71981b95f0a4baa4585a
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7207
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
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| Recommended Citation: | |
Kwok R.. Simulated effects of a snow layer on retrieval of CryoSat-2 sea ice freeboard[J]. Geophysical Research Letters,2014-01-01,41(14).
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