北太平洋冬半年位势高度季节内振荡及其诊断分析
发布时间：2018-08-03 13:39
【摘要】：利用NCEP/DOE再分析资料,分析了1979—2012年北太平洋对流层冬半年位势高度的季节内振荡特征。结果表明:北太平洋上空的位势高度表现为显著的10~40 d季节内振荡特征,50~80°N纬度带内振荡最强,主要由东向西传播;位势高度季节内振荡的演变过程伴随太平洋高压脊以及东亚大槽的显著变化;在垂直方向上具有准正压的结构,位势高度季节内振荡的时间演变与地转涡度平流和散度项的季节内振荡有关,其向西移动也是受地转涡度平流和散度项的引导。
[Abstract]:Based on the NCEP/DOE reanalysis data, the intraseasonal oscillation characteristics of winter geopotential height in the troposphere of the North Pacific from 1979 to 2012 are analyzed. The results show that the geopotential height over the North Pacific Ocean is the strongest in the latitude zone of 5080 掳N and propagates mainly from east to west. The evolution of the potential height intraseasonal oscillation is accompanied by significant changes in the Pacific ridge and the East Asian trough, and has a quasi-barotropic structure in the vertical direction. The temporal evolution of the potential height intraseasonal oscillation is related to the intraseasonal oscillation of the geostrophic vorticity advection and divergence term, and its westward movement is also guided by the geostrophic vorticity advection and divergence term.
【作者单位】： 成都信息工程大学;南京信息工程大学气象灾害教育部重点实验室;
【基金】：国家重点基础研究发展计划(973)项目(2015CB453201) 江苏省自然科学基金重点项目(BK20150062) 教育部归国留学人员科研启动基金项目(2015s009)
【分类号】：P732
[Abstract]:Based on the NCEP/DOE reanalysis data, the intraseasonal oscillation characteristics of winter geopotential height in the troposphere of the North Pacific from 1979 to 2012 are analyzed. The results show that the geopotential height over the North Pacific Ocean is the strongest in the latitude zone of 5080 掳N and propagates mainly from east to west. The evolution of the potential height intraseasonal oscillation is accompanied by significant changes in the Pacific ridge and the East Asian trough, and has a quasi-barotropic structure in the vertical direction. The temporal evolution of the potential height intraseasonal oscillation is related to the intraseasonal oscillation of the geostrophic vorticity advection and divergence term, and its westward movement is also guided by the geostrophic vorticity advection and divergence term.
【作者单位】： 成都信息工程大学;南京信息工程大学气象灾害教育部重点实验室;
【基金】：国家重点基础研究发展计划(973)项目(2015CB453201) 江苏省自然科学基金重点项目(BK20150062) 教育部归国留学人员科研启动基金项目(2015s009)
【分类号】：P732
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