太阳准周期变化对北半球夏季平流层加热率的影响  

Influence of solar quasi-periodic variation on stratospheric heating rate in the Northern Hemisphere in summer

作　　者：陆晏 郭栋[1] 陶丽[1] 张峰[1] 刘仁强[1] 苏昱丞 LU Yan;GUO Dong;TAO Li;ZHANG Feng;LIU Renqiang;SU Yucheng

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心,江苏南京210044

出　　处：《大气科学学报》2017年第6期729-736,共8页Transactions of Atmospheric Sciences

基　　金：国家自然科学基金资助项目(41305039;91537213;41375098;41575040);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：采用1979—2013年6—8月欧洲中期数值预报中心ERA-Interim逐月再分析资料和2004—2010年6—8月美国国家大气和海洋管理局太阳光谱辐照度资料,利用北京气候中心大气辐射模式,计算了北半球平流层夏季臭氧加热率(Ozone Heating Rate,OHR)和净加热率(Net Heating Rate,NHR),分析了太阳准11 a变化中太阳活动强年与弱年纬向平均OHR(NHR)的差异,并讨论了差异形成的原因。结果表明:太阳活动强年比弱年的紫外辐射明显要强,导致OHR、NHR整层增强,且随高度增加而增加;臭氧浓度在平流层下层较小,在平流层上层较大,该变化导致OHR、NHR有类似的变化型,且稍向高处偏移;OHR、NHR在平流层上层的变化,由紫外辐射和臭氧共同作用,其他地区均为臭氧起主要作用。Ozone absorption of ultraviolet radiation is a main heat source and plays an important role in radiation balance of stratosphere.Solar cycle,especially ultraviolet radiation,can directly affect the stratospheric heating rate.According to the data from SIM(Spectral Irradiance Monitor)on the satellite SORCE,it indicates that the reduction of ultraviolet radiation is more than four to six times as prior research results in the weak solar activity years from2004to2007.The variation of ultraviolet radiation can affect the stratospheric heating rate by changing ozone distribution.Through qualitative research,ozone concentration mixing ratio shows strong positive anomaly in lower stratosphere,and also indicates positive correlation with solar heating rate in upper stratosphere in the strong solar activity years.In addition,lots of studies of stratospheric radiation balance used the annual average data.However,BD(Brewer Dobson)circulation relates with planetary wave effects and atmospheric thermal radiation plays a main role in stratospheric radiation balance in winter.To understand the essence,analysis of summer stratosphere is particularly significant.Thus,the main purpose of this paper is using the data of SIM and the mode of atmospheric radiation model to quantitatively study the effects of variations of ultraviolet radiation and ozone concentration mixing ratio in the solar cycle on the ozone heating rate(OHR)and the net heating rate(NHR).Based on the BCC RAD Model,OHR and NHR in stratosphere in the Northern Hemisphere in summer are calculated by using the ERA Interim monthly reanalysis data from European Centre for Medium Range Weather Forecasts(ECMWF)during1979-2013and the solar spectral irradiance data from National Oceanic and Atmosphere Administration(NOAA)from2004to2010.Variations of zonal mean OHR(NHR)in stratosphere in the11yr solar cycle are discussed,and the causes of differences between the strong and weak solar activity years are discussed.The results can be summarized as follows:Compared to the weak sol

关 键 词：太阳循环 紫外辐射 臭氧 加热率 平流层 

分 类 号：P421.32[天文地球—大气科学及气象学] P422.1