Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images

The spaceborne synthetic aperture radar (SAR) cross-polarization signal remains sensitive to sea surface wind speed with high signal-to-noise ratio under tropical cyclone (TC) conditions. It has the capability of observing TC intensity and size information over the ocean with large coverage and high...

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Autores principales:	Yuan Gao, Jie Zhang, Changlong Guan, Jian Sun
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	tropical cyclone wind distribution synthetic aperture radar Sentinel-1 symmetry index decay index Science Q
Acceso en línea:	https://doaj.org/article/43b7ffad218e402c88370ca24067ac2d
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spelling	oai:doaj.org-article:43b7ffad218e402c88370ca24067ac2d2021-11-25T18:53:42ZAnalyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images10.3390/rs132245012072-4292https://doaj.org/article/43b7ffad218e402c88370ca24067ac2d2021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4501https://doaj.org/toc/2072-4292The spaceborne synthetic aperture radar (SAR) cross-polarization signal remains sensitive to sea surface wind speed with high signal-to-noise ratio under tropical cyclone (TC) conditions. It has the capability of observing TC intensity and size information over the ocean with large coverage and high spatial resolution. In this paper, TC wind distribution characteristics were studied based on SAR images. We collected 41 Sentinel-1A/B cross-polarization images covering TC eye, which were acquired between 2016 and 2020. For each case, sea surface wind speeds were retrieved by the modified MS1A model in a spatial resolution of 1 km. After deriving the value and location of maximum wind speed, wind fields were simulated symmetrically within a 200 km radius. Two new methodologies were proposed to calculate the decay index and the symmetry index based on the retrieved and simulated wind fields. Characteristics of the two indices were analyzed with respect to maximum wind. In addition, the maximum and averaged wind speeds of the right, back and left side of the motion direction were compared with TC intensity and storm motion speed. Statistical results indicate that right-side wind speed is the strongest for maximum and average, the wind difference between the left and right side is dependent on storm motion speed.Yuan GaoJie ZhangChanglong GuanJian SunMDPI AGarticletropical cyclonewind distributionsynthetic aperture radarSentinel-1symmetry indexdecay indexScienceQENRemote Sensing, Vol 13, Iss 4501, p 4501 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tropical cyclone wind distribution synthetic aperture radar Sentinel-1 symmetry index decay index Science Q
spellingShingle	tropical cyclone wind distribution synthetic aperture radar Sentinel-1 symmetry index decay index Science Q Yuan Gao Jie Zhang Changlong Guan Jian Sun Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
description	The spaceborne synthetic aperture radar (SAR) cross-polarization signal remains sensitive to sea surface wind speed with high signal-to-noise ratio under tropical cyclone (TC) conditions. It has the capability of observing TC intensity and size information over the ocean with large coverage and high spatial resolution. In this paper, TC wind distribution characteristics were studied based on SAR images. We collected 41 Sentinel-1A/B cross-polarization images covering TC eye, which were acquired between 2016 and 2020. For each case, sea surface wind speeds were retrieved by the modified MS1A model in a spatial resolution of 1 km. After deriving the value and location of maximum wind speed, wind fields were simulated symmetrically within a 200 km radius. Two new methodologies were proposed to calculate the decay index and the symmetry index based on the retrieved and simulated wind fields. Characteristics of the two indices were analyzed with respect to maximum wind. In addition, the maximum and averaged wind speeds of the right, back and left side of the motion direction were compared with TC intensity and storm motion speed. Statistical results indicate that right-side wind speed is the strongest for maximum and average, the wind difference between the left and right side is dependent on storm motion speed.
format	article
author	Yuan Gao Jie Zhang Changlong Guan Jian Sun
author_facet	Yuan Gao Jie Zhang Changlong Guan Jian Sun
author_sort	Yuan Gao
title	Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
title_short	Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
title_full	Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
title_fullStr	Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
title_full_unstemmed	Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images
title_sort	analyzing sea surface wind distribution characteristics of tropical cyclone based on sentinel-1 sar images
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/43b7ffad218e402c88370ca24067ac2d
work_keys_str_mv	AT yuangao analyzingseasurfacewinddistributioncharacteristicsoftropicalcyclonebasedonsentinel1sarimages AT jiezhang analyzingseasurfacewinddistributioncharacteristicsoftropicalcyclonebasedonsentinel1sarimages AT changlongguan analyzingseasurfacewinddistributioncharacteristicsoftropicalcyclonebasedonsentinel1sarimages AT jiansun analyzingseasurfacewinddistributioncharacteristicsoftropicalcyclonebasedonsentinel1sarimages
_version_	1718410582812524544

Analyzing Sea Surface Wind Distribution Characteristics of Tropical Cyclone Based on Sentinel-1 SAR Images

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