Wind retrievals in typhoons from QuikSCAT considering rain effect

Juhong Zou; Mingsen Lin; Delu Pan; Zhenghua Chen; Le Yang

doi:10.1117/12.799901

13 October 2008 Wind retrievals in typhoons from QuikSCAT considering rain effect

Juhong Zou, Mingsen Lin, Delu Pan, Zhenghua Chen, Le Yang

Proceedings Volume 7105, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008; 71050V (2008) https://doi.org/10.1117/12.799901
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

By analyzing several collocated QuikSCAT measurements and Special Sensor Microwave Imager (SSM/I) rain rate in typhoons, the evidence of rain influence to wind retrieval is presented. The results show that the present of heavy rain in typhoons will cause large bias in both wind speed and wind direction for QuikSCAT wind retrieval. So that the Holland's model is applied in the ambiguity clear process to correct the errors in wind direction induced by rain. Also, a radiate transfer function (RTF) and collocated SSM/I rain rate is employed to correct the attenuation and scattering effects of rain. The performance of RTF method is limited due to lack of information of the collocated rain rate and the un-precise of the RTF. As an alternative way to RTF, an interpolation method which just uses the data from QuikSCAT itself is introduced to correct the attenuation and scattering effects of rain. This method is applied to retrieve the wind vector in typhoon Ioke, the result shows that the bias in the wind direction and wind speed induced by rain has both been well corrected, indicating that our correction to the impacts of rain on QuikSCAT wind retrieval in typhoons is effective.

Citation Download Citation

Juhong Zou, Mingsen Lin, Delu Pan, Zhenghua Chen, and Le Yang "Wind retrievals in typhoons from QuikSCAT considering rain effect", Proc. SPIE 7105, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008, 71050V (13 October 2008); https://doi.org/10.1117/12.799901

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KEYWORDS

Meteorology

Signal attenuation

Eye

Eye models

Scattering

Backscatter

Electronic filtering

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