| DOI: | 10.1002/2016GL070799
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| 论文题名: | Radar imaging of intense nonlinear Ekman divergence |
| 作者: | Liu G.; Perrie W.; Kudryavtsev V.; He Y.; Shen H.; Zhang B.; Hu H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8632
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| EISSN: | 1944-8363
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| 出版年: | 2016
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| 卷: | 43, 期:18 | | 起始页码: | 9810
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| 结束页码: | 9818
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| 语种: | 英语
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| 英文关键词: | nonlinear Ekman divergence
; oceanic thermal front
; strong vertical transports
; submesoscale processes
; synthetic aperture radar (SAR)
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| Scopus关键词: | Atmospheric boundary layer
; Atmospheric movements
; Atmospheric temperature
; Backscattering
; Boundary layers
; Ocean currents
; Oceanography
; Radar
; Surface waters
; Synthetic aperture radar
; Air sea interactions
; Marine atmospheric boundary layer
; Nonlinear Ekman divergence
; Positive correlations
; Sea Surface Temperature gradients
; Synthetic aperture radar (SAR) images
; Thermal fronts
; Vertical transports
; Radar imaging
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| 英文摘要: | In general, given an oceanic thermal front, there is a strong positive correlation between sea surface temperature (SST) gradients and surface winds, and the marine atmospheric boundary layer is unstable over the warm side of the oceanic thermal front. The Gulf Stream is a notable example of an oceanic thermal front, and its warm side is often detected as enhanced backscatter in synthetic aperture radar (SAR) images. However, in some “anomalous” SAR images, low backscatter is sometimes observed on the warm side of the front, which seems inconsistent. Therefore, we propose a mechanism to interpret the generation of the low backscatter, based on interactions between ocean surface wind waves and intense nonlinear Ekman divergence. This mechanism is verified by showing that patterns in an observed anomalous SAR image are in good agreement with those in the simulated radar signature. In addition, this methodology and analysis demonstrate that SAR is potentially important for detecting and diagnosing small scale air-sea interactions and upper ocean dynamics with strong vertical transports induced by submesoscale processes. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988643507&doi=10.1002%2f2016GL070799&partnerID=40&md5=7fe2b543bb1742aa4ebe8e2c3bdf3cc2
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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/9595
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China
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| Recommended Citation: | |
Liu G.,Perrie W.,Kudryavtsev V.,et al. Radar imaging of intense nonlinear Ekman divergence[J]. Geophysical Research Letters,2016-01-01,43(18).
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