| LIU Shuming,LI Ziwei,YANG Xiaofeng,Pichel William G,YU Yang,ZHENG Quanan,LI Xiaofeng. 2010. Atmospheric frontal gravity waves observed in satellite SAR images of the Bohai Sea and Huanghai Sea. Acta Oceanologica Sinica, 29(5):35－43 |
| Atmospheric frontal gravity waves observed in satellite SAR images of the Bohai Sea and Huanghai Sea |
| Atmospheric frontal gravity waves observed in satellite SAR images of the Bohai Sea and Huanghai Sea |
| Received:April 06, 2010 Revised:July 30, 2010 |
| DOI：10.1007/s13131-010-0061-8 |
| Key words:Atmospheric gravity waves atmospheric front generation mechanism synthetic aperture radar |
| 中文关键词: Atmospheric gravity waves atmospheric front generation mechanism synthetic aperture radar |
| 基金项目:国土资源大调查项目(1212010611402);国家自然科学基金(40642009)。 |
| Author Name | Affiliation | E-mail | | LIU Shuming | The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
National Marine Data and Information Service, Tianjin 300171, China | lizw@irsa.ac.cn | | LI Ziwei | Institute of Remote Sensing Applications Chinese Academy of Science, Beijing 100101, China | | | YANG Xiaofeng | Institute of Remote Sensing Applications Chinese Academy of Science, Beijing 100101, China | | | Pichel William G | NOAA/NESDIS, Center for Satellite Applications and Research, Camp Springs, MD 20746-4304, USA | | | YU Yang | The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | ZHENG Quanan | Department of Atmospheric and Oceanic Science, University of Maryland, Maryland 20742-2425, USA | | | LI Xiaofeng | IMSG at NOAA/NESDIS, NOAA E/RA3, WWBG, Room 102, 5200 Auth Road, Camp Springs, MD 20746-4304, USA | |
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| Abstract: |
| In the satellite synthetic aperture radar (SAR) images of the Bohai Sea and Huanghai Sea, the authors observe sea surface imprints of wave-like patterns with an average wavelength of 3.8 km. Comparing SAR observations with sea surface wind fields and surface weather maps, the authors find that the occurrence of the wave-like phenomena is associated with the passing of atmospheric front. The authors define the waves as atmospheric frontal gravity waves. The dynamical parameters of the wave packets are derived from statistics of 9 satellite SAR images obtained from 2002 to 2008. A two-dimensional linear physical wave model is used to analyze the generation mechanism of the waves. The atmospheric frontal wave induced wind variation across the frontal wave packet is compared with wind retrievals from the SAR images. The CMOD-5 (C-band scatterometer ocean geophysical model function) is used for SAR wind retrievals VV (transmitted vertical and received vertical) for ENVISAT and HH (transmitted horizontally and received horizontally) for RADARSAT-1. A reasonable agreement between the analytical solution and the SAR observation is reached. This new SAR frontal wave observation adds to the school of SAR observations of sea surface imprints of AGWs including island lee waves, coastal lee waves, and upstream Atmospheric Gravity Waves (AGW). |
| 中文摘要: |
| In the satellite synthetic aperture radar (SAR) images of the Bohai Sea and Huanghai Sea, the authors observe sea surface imprints of wave-like patterns with an average wavelength of 3.8 km. Comparing SAR observations with sea surface wind fields and surface weather maps, the authors find that the occurrence of the wave-like phenomena is associated with the passing of atmospheric front. The authors define the waves as atmospheric frontal gravity waves. The dynamical parameters of the wave packets are derived from statistics of 9 satellite SAR images obtained from 2002 to 2008. A two-dimensional linear physical wave model is used to analyze the generation mechanism of the waves. The atmospheric frontal wave induced wind variation across the frontal wave packet is compared with wind retrievals from the SAR images. The CMOD-5 (C-band scatterometer ocean geophysical model function) is used for SAR wind retrievals VV (transmitted vertical and received vertical) for ENVISAT and HH (transmitted horizontally and received horizontally) for RADARSAT-1. A reasonable agreement between the analytical solution and the SAR observation is reached. This new SAR frontal wave observation adds to the school of SAR observations of sea surface imprints of AGWs including island lee waves, coastal lee waves, and upstream Atmospheric Gravity Waves (AGW). |
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