Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery
Abstract This study developed a morphological model for Tropical Cyclone (TC) wind and inflow angle asymmetry based on sea surface wind fields derived from spaceborne synthetic aperture radar (SAR) images. The model extracts the standard TC morphological information (center, intensity, and radius of...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-10-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2021GL095699 |
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| _version_ | 1850115871926648832 |
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| author | Guosheng Zhang Xiaofeng Li William Perrie Jun A. Zhang |
| author_facet | Guosheng Zhang Xiaofeng Li William Perrie Jun A. Zhang |
| author_sort | Guosheng Zhang |
| collection | DOAJ |
| description | Abstract This study developed a morphological model for Tropical Cyclone (TC) wind and inflow angle asymmetry based on sea surface wind fields derived from spaceborne synthetic aperture radar (SAR) images. The model extracts the standard TC morphological information (center, intensity, and radius of the maximum wind) and decomposes the SAR‐derived winds into vortex rotation winds and motion vector, making the reconstruction of the entire TC structure reliable, even in areas not mapped by SAR. The derived wind speeds and inflow angles are verified with aircraft measurements by stepped‐frequency microwave radiometer and dropsondes, obtaining root‐mean‐square errors of 4.32 m/s and 16.04°, respectively. A systematic analysis of 130 SAR TCs images, collected by RADARSAT‐2 and SENTINEL‐1, reveals that the model can capture the main asymmetrical TC structure. Both TC asymmetry and eye size decrease as TC intensity increases. |
| format | Article |
| id | doaj-art-d3e869a0c23b48478db6f13a633946f0 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2021-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d3e869a0c23b48478db6f13a633946f02025-08-20T02:36:28ZengWileyGeophysical Research Letters0094-82761944-80072021-10-014820n/an/a10.1029/2021GL095699Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR ImageryGuosheng Zhang0Xiaofeng Li1William Perrie2Jun A. Zhang3Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences Qingdao ChinaKey Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences Qingdao ChinaFisheries and Oceans Canada Bedford Institute of Oceanography Dartmouth NS CanadaNational Oceanic and Atmospheric Administration/Atlantic Oceanographic and Meteorological Laboratory Hurricane Research Division University of Miami Cooperative Institute for Marine and Atmospheric Studies Miami FL USAAbstract This study developed a morphological model for Tropical Cyclone (TC) wind and inflow angle asymmetry based on sea surface wind fields derived from spaceborne synthetic aperture radar (SAR) images. The model extracts the standard TC morphological information (center, intensity, and radius of the maximum wind) and decomposes the SAR‐derived winds into vortex rotation winds and motion vector, making the reconstruction of the entire TC structure reliable, even in areas not mapped by SAR. The derived wind speeds and inflow angles are verified with aircraft measurements by stepped‐frequency microwave radiometer and dropsondes, obtaining root‐mean‐square errors of 4.32 m/s and 16.04°, respectively. A systematic analysis of 130 SAR TCs images, collected by RADARSAT‐2 and SENTINEL‐1, reveals that the model can capture the main asymmetrical TC structure. Both TC asymmetry and eye size decrease as TC intensity increases.https://doi.org/10.1029/2021GL095699 |
| spellingShingle | Guosheng Zhang Xiaofeng Li William Perrie Jun A. Zhang Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery Geophysical Research Letters |
| title | Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery |
| title_full | Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery |
| title_fullStr | Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery |
| title_full_unstemmed | Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery |
| title_short | Tropical Cyclone Winds and Inflow Angle Asymmetry From SAR Imagery |
| title_sort | tropical cyclone winds and inflow angle asymmetry from sar imagery |
| url | https://doi.org/10.1029/2021GL095699 |
| work_keys_str_mv | AT guoshengzhang tropicalcyclonewindsandinflowangleasymmetryfromsarimagery AT xiaofengli tropicalcyclonewindsandinflowangleasymmetryfromsarimagery AT williamperrie tropicalcyclonewindsandinflowangleasymmetryfromsarimagery AT junazhang tropicalcyclonewindsandinflowangleasymmetryfromsarimagery |