INTERDECADAL VARIABILITY OF QUASI-BIENNIAL OSCILLATION OF STRATOSPHERIC ZONAL WIND

作者：韓浦城,簡茂球,林曉霞

摘要：This study investigates the interdecadal variability of Quasi-biennial Oscillation(QBO) based on the sounding data in the stratosphere, ERA-40 and ERA-interim reanalysis data in the past 62 years. The QBO periodicity experiences a significant interdecadal variability;the longer(shorter) the mean period, the smaller(larger) the amplitude of variation is. The QBO amplitude varies in a cycle around 10 to 15 years and in an out-of-phase correlation with the period. In addition, there is an increasing trend of the QBO amplitude in 30 to 10 hPa, while a little declining trend in70 to 40 hPa. The deviation of the QBO zonal wind extremum centers from the equator also shows interdecadal variability. The deviation location of the easterly core is generally in the reverse side to the westerly core, which means that when the easterly core is on one side of a hemisphere, the westerly core is on the other side.

發文機構：School of Atmospheric Sciences/Center for Monsoon and Environment Research/Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Guangdong Meteorological Observatory Guangdong Meteorological Observation Data Center

關鍵詞：statisticalFEATUREQBOINTERDECADALvariabilityZONALwindasymmetricFEATURE

分類號： P425.42[天文地球—大氣科學及氣象學]