δ效应下的非纬向基本气流的斜压不稳定  

Baroclinic Instability of the Non-Zonal Base Flow Under δ Effect

作　　者：陈悦 宋健[1] CHEN Yue, SONG Jian(Inner Mongolia University of Technology, Huhhot 010051, Chin)

机构地区：[1]内蒙古工业大学理学院

出　　处：《数学的实践与认识》2018年第17期148-153,共6页Mathematics in Practice and Theory

基　　金：国家自然科学基金(11362012,11562014,41465002);全球变化研究国家重大科学研究计划(2012CB955902)

摘　　要：在推广的β平面近似下（δ效应）对大气的两层模式研究了一般非纬向基本气流情况下的斜压不稳定.给出了基本气流斜压不稳定的影响,结果表明,在非纬向基本气流情况下,δ效应（球面效应）会使斜压不稳定更明显,β随纬度的变化可能是中高纬度产生斜压不稳定的原因之一.The baroclinic instability in the general non-zonal direction is investigated for the two-layer model of the atmosphere under the generalized δ -plane approximation （δ effect）. The effects of the baroclinic instability of the base flow are given. The results show that 5 effect （spherical effect） makes baroclinic instability more pronounced in the case of the non-zonal base flow, and the variation of β with latitude may be one of the causes of baroclinic instability at mid-high latitudes.

关 键 词：非纬向基本气流 δ效应 斜压不稳定 波速 

分 类 号：P432[天文地球—大气科学及气象学]