High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval

High-resolution sea surface observations by spaceborne synthetic aperture radar (SAR) instruments are sorely neglected resources for meteorological applications in polar regions. Such radar observations provide information about wind speed and direction based on wind-induced roughness of the sea sur...

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Autores principales:	Mathias Tollinger, Rune Graversen, Harald Johnsen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	SAR polar low wind retrieval mesoscale convective vortex remote sensing Sentinel-1 Science Q
Acceso en línea:	https://doaj.org/article/579c4435fff24106ad0d93dd858224de
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id	oai:doaj.org-article:579c4435fff24106ad0d93dd858224de
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spelling	oai:doaj.org-article:579c4435fff24106ad0d93dd858224de2021-11-25T18:55:09ZHigh-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval10.3390/rs132246552072-4292https://doaj.org/article/579c4435fff24106ad0d93dd858224de2021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4655https://doaj.org/toc/2072-4292High-resolution sea surface observations by spaceborne synthetic aperture radar (SAR) instruments are sorely neglected resources for meteorological applications in polar regions. Such radar observations provide information about wind speed and direction based on wind-induced roughness of the sea surface. The increasing coverage of SAR observations in polar regions calls for the development of SAR-specific applications that make use of the full information content of this valuable resource. Here we provide examples of the potential of SAR observations to provide details of the complex, mesoscale wind structure during polar low events, and examine the performance of two current wind retrieval methods. Furthermore, we suggest a new approach towards accurate wind vector retrieval of complex wind fields from SAR observations that does not require a priori wind direction input that the most common retrieval methods are dependent on. This approach has the potential to be particularly beneficial for numerical forecasting of weather systems with strong wind gradients, such as polar lows.Mathias TollingerRune GraversenHarald JohnsenMDPI AGarticleSARpolar lowwind retrievalmesoscale convective vortexremote sensingSentinel-1ScienceQENRemote Sensing, Vol 13, Iss 4655, p 4655 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SAR polar low wind retrieval mesoscale convective vortex remote sensing Sentinel-1 Science Q
spellingShingle	SAR polar low wind retrieval mesoscale convective vortex remote sensing Sentinel-1 Science Q Mathias Tollinger Rune Graversen Harald Johnsen High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
description	High-resolution sea surface observations by spaceborne synthetic aperture radar (SAR) instruments are sorely neglected resources for meteorological applications in polar regions. Such radar observations provide information about wind speed and direction based on wind-induced roughness of the sea surface. The increasing coverage of SAR observations in polar regions calls for the development of SAR-specific applications that make use of the full information content of this valuable resource. Here we provide examples of the potential of SAR observations to provide details of the complex, mesoscale wind structure during polar low events, and examine the performance of two current wind retrieval methods. Furthermore, we suggest a new approach towards accurate wind vector retrieval of complex wind fields from SAR observations that does not require a priori wind direction input that the most common retrieval methods are dependent on. This approach has the potential to be particularly beneficial for numerical forecasting of weather systems with strong wind gradients, such as polar lows.
format	article
author	Mathias Tollinger Rune Graversen Harald Johnsen
author_facet	Mathias Tollinger Rune Graversen Harald Johnsen
author_sort	Mathias Tollinger
title	High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
title_short	High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
title_full	High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
title_fullStr	High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
title_full_unstemmed	High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval
title_sort	high-resolution polar low winds obtained from unsupervised sar wind retrieval
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/579c4435fff24106ad0d93dd858224de
work_keys_str_mv	AT mathiastollinger highresolutionpolarlowwindsobtainedfromunsupervisedsarwindretrieval AT runegraversen highresolutionpolarlowwindsobtainedfromunsupervisedsarwindretrieval AT haraldjohnsen highresolutionpolarlowwindsobtainedfromunsupervisedsarwindretrieval
_version_	1718410523332050944

High-Resolution Polar Low Winds Obtained from Unsupervised SAR Wind Retrieval

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