大气科学学报2012，Vol.35Issue(3)：311-321,11.
热力强迫对澳洲北部越赤道气流强弱变化的影响
The impacts of thermal forcing on the cross-equatorial flow over North Australia
摘要
Abstract
Using the NCEP/NCAR reanalysis data during 1980-2004, some forcing factors, such as la-tent heat release from condensation and underlaying surface thermal differecence, are defined and their impacts on the south-to-north cross-equatorial flow are studied with diagnosis analysis and numerical simulation. Main conclusions are shown as follows：the cold Australia land always corresponds to strong Australian High or frequent cold air activities, which is favorable for the formation of strong cross-equa-torial flow;the cold underlaying surface to the south of the channel is often accompanied by weak Walker circulation, which is also helpful for the establishment of strong cross-equatorial flow;the warm Indo-China peninsula and cold South China Sea, as well as the strong heat source near the Philippines, all can be associated with strong convergence zone in north hemisphere, which is advantageous for the formation of strong cross-equatorial flow. The features of forcing factors and circulation factors corre- sponding to weak south-to-north cross-equatorial flow are opposite to the above ones.关键词
越赤道气流/强迫因子/强弱变化Key words
cross-equatorial flow/forcing factor/reinforcement and decline分类
天文与地球科学引用本文复制引用
黄亮,谭桂容,刘向文..热力强迫对澳洲北部越赤道气流强弱变化的影响[J].大气科学学报,2012,35(3):311-321,11.基金项目
公益性行业（气象）科研专项（GYHY（QX）20080232 （）
GYHY（QX）201206033） （）
