Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar
We present a relatively simple method to estimate tropical cyclone (TC) surface wind structure (34-, 50-, and 64-kt wind radii) and intensity [maximum wind speed (MWS)] from wind fields acquired from the <italic>L</italic>-band SMAP radiometer and <italic>C</italic>-band Sent...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9380372/ |
| _version_ | 1819137276643377152 |
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| author | Biao Zhang Ziqiang Zhu William Perrie Jie Tang Jun A. Zhang |
| author_facet | Biao Zhang Ziqiang Zhu William Perrie Jie Tang Jun A. Zhang |
| author_sort | Biao Zhang |
| collection | DOAJ |
| description | We present a relatively simple method to estimate tropical cyclone (TC) surface wind structure (34-, 50-, and 64-kt wind radii) and intensity [maximum wind speed (MWS)] from wind fields acquired from the <italic>L</italic>-band SMAP radiometer and <italic>C</italic>-band Sentinel-1A/B and RADARSAT-2 synthetic aperture radar (SAR) between 2015 and 2020. The radiometer and SAR-derived wind radii and MWS are systematically compared with the best-track estimates. The root-mean-square errors (RMSEs) of R34, R50, and R64 are 31.2, 21.8, and 17.0 nmi (1 nmi = 1.852 km) for radiometer, and 21.7, 16.5, and 16.3 nmi for SAR, respectively. These error values are smaller than the averaged best-track uncertainty estimates for the three wind radii. Compared with the best-track reports, the bias and RMSE for the MWS estimates are −0.2 m/s and 5.8 m/s for radiometer, and 4.4 m/s and 9.1 m/s for SAR, respectively. These results are for the wind speeds in the range of 17–80 m/s. For the two typical TCs (Lionrock and Noru) in the Northwest Pacific Ocean, our results show that a combination of the radiometer and SAR wind data acquired within a very short time interval has the potential to simultaneously obtain reasonable measurements of the wind radii and intensity parameters. Moreover, for a TC with a long lifecycle, such as Typhoon Noru, we demonstrate that the high-resolution and multitemporal synergistic observations from SAR and radiometer are valuable for studying fine-scale features of the wind field and characteristics of wind asymmetry associated with intensity change, as well as the evolution of TC surface wind structure and intensity. |
| first_indexed | 2024-12-22T10:48:18Z |
| format | Article |
| id | doaj.art-80d884ffaf964d99a511d373b67e72f7 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-12-22T10:48:18Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-80d884ffaf964d99a511d373b67e72f72022-12-21T18:28:52ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352021-01-01144043405010.1109/JSTARS.2021.30658669380372Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture RadarBiao Zhang0https://orcid.org/0000-0001-6727-8611Ziqiang Zhu1William Perrie2https://orcid.org/0000-0002-3598-2791Jie Tang3Jun A. Zhang4School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, ChinaSchool of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, ChinaDepartment of Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, CanadaShanghai Typhoon Institute, China Meteorological Administration, Shanghai, ChinaHurricane Research Division, Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Washington, DC, USAWe present a relatively simple method to estimate tropical cyclone (TC) surface wind structure (34-, 50-, and 64-kt wind radii) and intensity [maximum wind speed (MWS)] from wind fields acquired from the <italic>L</italic>-band SMAP radiometer and <italic>C</italic>-band Sentinel-1A/B and RADARSAT-2 synthetic aperture radar (SAR) between 2015 and 2020. The radiometer and SAR-derived wind radii and MWS are systematically compared with the best-track estimates. The root-mean-square errors (RMSEs) of R34, R50, and R64 are 31.2, 21.8, and 17.0 nmi (1 nmi = 1.852 km) for radiometer, and 21.7, 16.5, and 16.3 nmi for SAR, respectively. These error values are smaller than the averaged best-track uncertainty estimates for the three wind radii. Compared with the best-track reports, the bias and RMSE for the MWS estimates are −0.2 m/s and 5.8 m/s for radiometer, and 4.4 m/s and 9.1 m/s for SAR, respectively. These results are for the wind speeds in the range of 17–80 m/s. For the two typical TCs (Lionrock and Noru) in the Northwest Pacific Ocean, our results show that a combination of the radiometer and SAR wind data acquired within a very short time interval has the potential to simultaneously obtain reasonable measurements of the wind radii and intensity parameters. Moreover, for a TC with a long lifecycle, such as Typhoon Noru, we demonstrate that the high-resolution and multitemporal synergistic observations from SAR and radiometer are valuable for studying fine-scale features of the wind field and characteristics of wind asymmetry associated with intensity change, as well as the evolution of TC surface wind structure and intensity.https://ieeexplore.ieee.org/document/9380372/Intensityradiometersynthetic aperture radar (SAR)tropical cyclone (TC)wind structure |
| spellingShingle | Biao Zhang Ziqiang Zhu William Perrie Jie Tang Jun A. Zhang Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Intensity radiometer synthetic aperture radar (SAR) tropical cyclone (TC) wind structure |
| title | Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar |
| title_full | Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar |
| title_fullStr | Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar |
| title_full_unstemmed | Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar |
| title_short | Estimating Tropical Cyclone Wind Structure and Intensity From Spaceborne Radiometer and Synthetic Aperture Radar |
| title_sort | estimating tropical cyclone wind structure and intensity from spaceborne radiometer and synthetic aperture radar |
| topic | Intensity radiometer synthetic aperture radar (SAR) tropical cyclone (TC) wind structure |
| url | https://ieeexplore.ieee.org/document/9380372/ |
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