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初始场水汽通量在一次登陆台风降水模拟中的作用
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作者 万赏 张飞民 +1 位作者 王澄海 吴蔚 《兰州大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第5期577-585,共9页
用三维变分同化方法,通过同化加密地面观测资料和X波段雷达观测资料,研究初始场陆地侧水汽通量对台风“狮子山”登陆期间降水模拟效果的影响.结果表明,同化加密地面资料能够明显改进初始场陆地侧大气边界层的热动力场,通过减弱海-陆热... 用三维变分同化方法,通过同化加密地面观测资料和X波段雷达观测资料,研究初始场陆地侧水汽通量对台风“狮子山”登陆期间降水模拟效果的影响.结果表明,同化加密地面资料能够明显改进初始场陆地侧大气边界层的热动力场,通过减弱海-陆热力对比及陆地向登陆台风的大气边界层东北的水汽通量,改善登陆台风外围雨带影响下的沿岸陆地-海洋两侧地区降水的模拟效果. X波段雷达资料通过增强初始场中雷达探测范围内的低层大气水汽通量改善登陆台风外围雨带降水的模拟效果. 展开更多
关键词 登陆台风 水汽通量 加密地面资料 x波段雷达观测 资料同化
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Extraction of internal wave amplitude from nautical X-Band radar observations 被引量:2
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作者 查国震 林明森 +2 位作者 申辉 何宜军 吕海滨 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第3期497-505,共9页
One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continu... One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continuous stratified finite depth system. We have also tested the method of measuring the amplitude of IWs from X-Band radar backscatter image sequences acquired on June 2009 in the northeastern South China Sea. The method was applied in several radar images. Experiments show that the retrieval amplitudes are consistent with the in-situ observational amplitudes of IWs by using the towed thermistor chain and conductivity-temperature-depth (CTD) profile. The uncertainty of the method is also discussed. 展开更多
关键词 internal wave amplitude x-Band radar nonlinear velocity remote sensing radon transform Brunt-V^iis/il/i frequency
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