Comparison of Typhoon Locations over Ocean Surface Observed by Various Satellite Sensors
Comparison of Typhoon Locations over Ocean Surface Observed by Various Satellite Sensors
复制标题
DOI：
10.3390/rs5073172
复制
发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Yufang Pan;Antony K. Liu;Shuangyan He;Jingsong Yang;M. He
中科院分区：
文献类型：
--
作者：
Yufang Pan;Antony K. Liu;Shuangyan He;Jingsong Yang;M. He
分别从合成孔径雷达(SAR)海面粗糙度图像和红外(IR)图像云顶暖区提取台风眼。利用Envisat合成孔径雷达图像、多功能传输卫星(MTSAT)和中国气象卫星冯云二号(风云二号)红外图像对2005-2011年北太平洋西部台风进行了研究。利用三个不同年份、不同位置、不同条件的台风个例，对海面上的台风眼图像和云顶上的红外图像进行了比较。此外，对台风联合预警中心(JTWC)、中国气象局(CMA)和日本气象厅(JMA)的最佳路径数据进行了校核。由于垂直风切变的作用是垂直倾斜，台风眼在海洋表面的位置与在云层顶部的位置不同。因此，台风眼睛在海洋表面和云顶之间的巨大水平距离意味着相关的垂直风切变剖面比通常预期的要复杂得多。这一结果表明，合成孔径雷达可以作为研究海面台风的有用工具。
In this study, typhoon eyes have been delineated using wavelet analysis from the synthetic aperture radar (SAR) images of ocean surface roughness and from the warm area at the cloud top in the infrared (IR) images, respectively. Envisat SAR imagery, and multi-functional transport satellite (MTSAT) and Feng Yun (FY)-2 Chinese meteorological satellite IR imagery were used to examine the typhoons in the western North Pacific from 2005 to 2011. Three cases of various typhoons in different years, locations, and conditions have been used to compare the typhoon eyes derived from SAR (on the ocean surface) with IR (at the cloud-top level) images. Furthermore, the best track data from the Joint Typhoon Warning Center (JTWC), Chinese Meteorological Administration (CMA), and the Japan Meteorological Agency (JMA) are checked for the calibration. Because of the vertical wind shear, which acts as an upright tilt, the location of the typhoon eye on the ocean surface differs from that at the top of the clouds. Consequently, the large horizontal distance between typhoon eyes on the ocean surface and on the cloud top implies that the associated vertical wind shear profile is considerably more complex than generally expected. This result demonstrates that SAR can be a useful tool for typhoon monitoring study over the ocean surface.