冬季太阳11年周期活动对大气环流的影响

发布时间：2018-01-11 20:34

本文关键词：冬季太阳11年周期活动对大气环流的影响　出处：《地球物理学报》2010年06期 　论文类型：期刊论文

【摘要】：利用气象场的再分析资料和太阳辐射活动资料,对太阳11年周期活动影响北半球冬季(11月～3月)大气环流的过程进行了统计分析和动力学诊断.根据赤道平流层纬向风准两年振荡(QBO)的东、西风状态对太阳活动效应进行了分类讨论,结果表明:东风态QBO时,太阳活动效应主要集中在赤道平流层中、高层和南半球平流层,强太阳活动时增强的紫外辐射加热了赤道地区的臭氧层,造成平流层低纬明显增温,同时加强了南半球的Brewer-Dobson(B-D)环流,引起南极高纬平流层温度增加;而北半球中高纬的环流主要受行星波的影响,太阳活动影响很小.西风态QBO时,太阳活动效应在北半球更为重要,初冬时强太阳活动除了加热赤道地区臭氧层外,还抑制了北半球的B-D环流,造成赤道平流层温度增加和纬向风梯度在垂直方向的变化,从而改变了对流层两支行星波波导的强度;冬末时在太阳活动调制下,行星波向极波导增强,B-D环流逐渐恢复,造成北半球极地平流层明显增温,同时伴随着赤道区域温度的下降.
[Abstract]:The reanalysis data of meteorological field and the data of solar radiation activity are used. A statistical analysis and dynamic diagnosis of the effects of the 11-year solar cycle on the atmospheric circulation in the northern hemisphere in winter (November to March) have been carried out according to the eastward zonal zonal oscillation of the equatorial stratosphere (QBO). The results show that the solar activity effect is mainly concentrated in the equatorial stratosphere, the upper layer and the stratosphere of the Southern Hemisphere in the easterly state of QBO. Enhanced ultraviolet radiation during strong solar activity heats up the ozone layer in the equatorial region, resulting in a significant increase in the stratospheric low latitudes and strengthening the Brewer-Dobsonian B-D) circulation in the Southern Hemisphere. The increase of stratospheric temperature at high latitudes in Antarctica; The circulation in the middle and high latitudes of the Northern Hemisphere is mainly affected by planetary waves and the solar activity is very small. In the westerly QBO, the solar activity effect is more important in the Northern Hemisphere. In the early winter, the strong solar activity not only heated the ozone layer in the equatorial region, but also inhibited the B-D circulation in the Northern Hemisphere, resulting in the increase of the equatorial stratospheric temperature and the variation of the zonal wind gradient in the vertical direction. Thus, the strength of two planetary wave waveguides in the troposphere is changed. At the end of winter, the polar waveguide enhanced B-D circulation was gradually restored under the modulation of solar activity, which caused the polar stratosphere of the Northern Hemisphere to increase temperature obviously, and accompanied by the decrease of the temperature in the equatorial region.
【作者单位】：中国科学院大气物理研究所中层大气与全球环境探测重点实验室;中国科学院研究生院;
【基金】：国家重点基础研究发展计划(2010CB428604) 国家自然科学基金重点项目(40633015)资助
【分类号】：P182.9;P434
【正文快照】： 1引言太阳是一颗体积、质量巨大的灼热恒星,是太阳系的中心天体,它通过自身的热核反应不断向宇宙空间发射巨大的能量.地球是太阳系中的一员,太阳辐射能是地球系统的主要能量来源,维持地球大气气候系统的能量也几乎全部来自于太阳,因此,太阳活动引起的辐射强度变化会给地球表

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