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《Chinese Journal of Geophysics》 2007-01
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Theory and numerical simulation of atmospheric ship waves generated by 3-D layered flow over double hills

LI Zi-Liang~(1,2,3)1 Laboratory of Physical Oceanography,Dept.of Marine Meteorology,Ocean University of China,Qingdao 266100,China2 Chengdu Institute of Plateau Meteorology,China Meteorological Administration, Chengdu 610072,China3 Department of Atmospheric Sciences,Physics of School,Peking University,Beijing 100871,China  
The theoretical calculation of mountain gravity waves and atmospheric ship waves generated by three-dimensional multi-layer flow over double hills are investigated.Using the three-dimensional multi-layer linear theory model to calculate the atmospheric ship wave fields,the atmospheric ship waves characteristics of two diverging modes are obtained where the three-dimensional multi-layer flow over the double mountains under the various stability condition.And the complex terrain plays a significant role in the propagation of the ship waves in the troposphere and stratosphere.The dynamical mechanism of the three-dimensional atmospheric ship waves generated by three-layer flow over double hills is investigated using the advanced regional prediction system(ARPS).The results show that there are four diverging modes of the atmospheric ship waves generated by three-layer flow over double hills,where there are two diverging lee wave modes generated by layered flow over each isolated hill,for the nonlinear interaction between the layered flows.Most importantly,the intensity and amplitude of mountain gravity waves generated by flow over double hills are greater than those by flow over the isolated hill. Furthermore,the characteristics of the atmospheric ship waves show a significant sensitivity to the distance between the two hills,and longer distance of the two hills can induce longer wavelength of the gravity waves generated by layered flow over double hills than the shorter case.Then,the waves of longer wavelength can propagate to higher altitude.
【Fund】: 中国气象局成都高原研究所开放基金(LPM2006018)资助
【CateGory Index】: P433
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【References】
Chinese Journal Full-text Database 1 Hits
1 WANG Guang-Hui,CHEN Feng-Feng,SHEN Xue-Shun,HU Jiang-Lin State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;The impact of topography filter processing and horizontal diffusion on precipitation prediction in numerical model[J];Chinese Journal of Geophysics;2008-06
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 LI Ziliang 1),2) ( 1) Department of Atmospheric Sciences, School of Physics, Peking University, Beijing, 100871; 2) Laboratory of Physical Oceanography, Department of Marine Meteorology,Ocean University of China, Qingdao,266003);Numerical Simulations of Mountain Gravity Waves Generated by Multi-Layer Flow over an Isolated Mountain[J];Acta Scientiarum Naturalium Universitatis Pekinensis;2006-03
2 ZANG Zeng-Liang1,2,ZHANG Ming2,and ZHANG Gui31 State Key Laboratory of Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 1000292 Institute of Meteorology,PLA University of Science & Technology,Nanjing 2111013 Institute of Science,PLA University of Science & Technology,Nanjing 211101;Theoretical and Numerical Research on Three-Dimensional Three-Layer Lee Wave[J];Chinese Journal of Atmospheric Sciences;2007-03
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 LI Ziliang 1),2) ( 1) Department of Atmospheric Sciences, School of Physics, Peking University, Beijing, 100871; 2) Laboratory of Physical Oceanography, Department of Marine Meteorology,Ocean University of China, Qingdao,266003);Numerical Simulations of Mountain Gravity Waves Generated by Multi-Layer Flow over an Isolated Mountain[J];Acta Scientiarum Naturalium Universitatis Pekinensis;2006-03
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