Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation

Lihua Wang; Yunxuan Zhou; Jianrong Zhu; Fang Shen; Bo Tian

doi:10.1007/s00343-014-3253-9

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Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation

OriginalPaper | Updated：2023-05-16

- Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation
- Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation
- 海洋湖沼学报（英文） 2014年32卷第4期页码：946-957
- Affiliations：
  
  State Key Laboratory of Estuarine and Coastal Research East China Normal University
- Author bio：
- Funds：
  
  Supported by the National Basic Research Program of China (973 Program) (No. 2010CB951204) and the State Key Laboratory of Estuarine and Coastal Research grant (No. SKLEC-2012KYYW02)
- DOI：10.1007/s00343-014-3253-9
  中图分类号：
- 网络首发：2014-07-11，
  
  纸质出版：2014
- Accepted：
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Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation[J]. 海洋湖沼学报（英文）, 2014,32(4):946-957.

Wang, L., Zhou, Y., Zhu, J. et al. Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation., Chin. J. Ocean. Limnol. 32, 946–957 (2014). https://doi.org/10.1007/s00343-014-3253-9
Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation[J]. 海洋湖沼学报（英文）, 2014,32(4):946-957. DOI： 10.1007/s00343-014-3253-9.

Wang, L., Zhou, Y., Zhu, J. et al. Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation., Chin. J. Ocean. Limnol. 32, 946–957 (2014). https://doi.org/10.1007/s00343-014-3253-9 DOI：

摘要

Abstract

Wind plays an important role in hydrodynamic processes such as the expansion of Changjiang (Yangtze) River Diluted Water (CDW)

and shelf circulation in the Changjiang estuary. Thus

it is essential to include wind in the numerical simulation of these phenomena. Synthetic aperture radar (SAR) with high resolution and wide spatial coverage is valuable for measuring spatially inhomogeneous ocean surface wind fields. We have collected 87 ERS-2 SAR images with wind-induced streaks that cover the Changjiang coastal area

to verify and improve the validity of wind direction retrieval using the 2D fast Fourier transform method. We then used these wind directions as inputs to derive SAR wind speeds using the C-band model. To demonstrate the applicability of the algorithms

we validated the SAR-retrieved wind fields using QuikSCAT measurements and the atmospheric Weather Research Forecasting model. In general

we found good agreement between the datasets

indicating the reliability and applicability of SAR-retrieved algorithms under different atmospheric conditions. We investigated the main error sources of this process

and conducted sensitivity analyses to estimate the wind speed errors caused by the effect of speckle

uncertainties in wind direction

and inaccuracies in the normalized radar cross section. Finally

we used the SAR-retrieved wind fields to simulate the salinity distribution off the Changjiang estuary. The findings of this study will be valuable for wind resource assessment and the development of future numerical ocean models based on SAR images.

关键词

Keywords

references

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