赤道平流层中下层纬向风准2a振荡与行星运动  

Relation between QBO periodic variation and planetary motion

作　　者：叶更新[1] 刘国禹[1] 

机构地区：[1]a通化市气象局,吉林通化134001

出　　处：《气象科学》2015年第3期323-327,共5页Journal of the Meteorological Sciences

基　　金：吉林省气象局科技创新基金(201054)

摘　　要：利用实况资料和小波分析方法研究了赤道平流层中下层纬向风准2 a振荡(简称QBO)周期变化与行星运动之间的联系,结果表明,QBO周期以火星冲日(25.68月)周期为基准,时而变长,时而变短。当地球、土星、天王星3星一线时,火星冲日月份30 h Pa纬向风由东风向西风转换;而3星成直角时,则从西风向东风的转换。QBO周期变化与木星冲日时的视赤纬存在明显的对应关系。当木星冲日视赤纬达到正极值时(此时为北半球的冬季),QBO周期达到最大;当木星冲日视赤纬达到负极值时(此时为北半球的夏季),QBO周期达到最小。QBO周期与木星冲日视赤纬之间的相关系数高达0.496,并通过0.001显著性检验。QBO强度与周期、木星冲日时的视赤纬呈现反相变化,即QBO强度的强(弱),对应于QBO周期的短(长)。木星冲日负(正)视赤纬,在过去60 a中,QBO的强度总体呈现增加的趋势,与天王星的视赤纬减小存在一定的联系。By using the recorded data and the wavelet analysis method,the relation between QBO periodic variation and planetary motion is studied. Results show that QBO cycle is based on Mars opposition period（ 25. 68 months）,and sometimes it is longer,sometimes it is shorter. When the Earth,Saturn,Uranus were in a line,the 30 h Pa zonal easterly wind converts to the westerly; when the three celestial bodies were at right angle,the westerly wind converts to the easterly. A significant connection exists between QBO cycle and Jupiter at opposition declination,when Jupiter opposition declination reaches the positive extreme（ the winter of northern hemisphere）,QBO cycle reaches its maximum,while Jupiter opposition declination reaches its negative extreme（ the summer of northern hemisphere）,QBO cycle approaches to its minimum. The correlation coefficient between QBO cycle and Jupiter opposition declination amounts to 0. 496,it means confidence correlation test greater than 0. 001. QBO intensity is in inverse phase with QBO cycle and Jupiter opposition declination,that is,strong（ weak） QBO intensity corresponds to the short（ long） QBO period and negative（ positive） Jupiter opposition declination. In the past 60 years,QBO intensity has been increasing with Uranus declination decreasing.

关 键 词：纬向风 平流层 周期变化 行星运动 视赤纬 

分 类 号：P425.72[天文地球—大气科学及气象学]