中国区临近空间太阳辐射环境研究

发布时间：2018-02-11 11:10

本文关键词： 临近空间太阳辐射紫外辐射 SBDART　出处：《光谱学与光谱分析》2016年03期 　论文类型：期刊论文

【摘要】：临近空间(20~50km)航空活动是全世界航空大国竞相研究的热点。太阳辐射环境研究是开展该高度层航空活动的必要前提,然而临近空间辐射观测资料空白对其开发利用造成了障碍。臭氧是影响高空辐射环境的关键因子,基于欧洲中尺度预报中心再分析资料对中国区临近空间臭氧的空间分布、季节变化特征进行了分析,发现其时空分布及演变具备区域性特点,同时根据平流层大气数据及地表特征等将中国临近空间划分为5个区域,确定不同区域关键参数值,利用SBDART辐射传输模型对临近空间全波段太阳辐射及紫外辐射分别进行模拟。模拟结果显示受纬度、臭氧总量、垂直分布等影响,辐射值变化规律较为复杂。全波段太阳辐射年均和逐月值随纬度降低而增大,年较差则相反;大气的吸收作用与纬度、海陆差异有关,表现出不同的强度和季节变化特征;在紫外波段,南海上空辐射最强,年较差小,月较差很小且夏强冬弱,其他区域辐射值夏强冬弱,月较差呈双峰特征,春秋强,冬夏弱;大气的吸收作用受多因子影响,除南海外,各区域夏季辐射垂向差异更大;大气吸收引起的月较差垂向变化均表现为6、7月高低空月振幅一致,其它月份辐射值在高层月较差更大。
[Abstract]:Aviation activity is a hot topic in the world. Solar radiation environment research is a necessary prerequisite for the development of aviation activities at this altitude. However, the gap in the observation data of near space radiation has created an obstacle to its development and utilization. Ozone is a key factor affecting the radiation environment in the upper air. Based on the reanalysis of the data from the European Center for Mesoscale Prediction, the spatial distribution of ozone in the adjacent space in China is analyzed. It is found that the spatial and temporal distribution and evolution have regional characteristics. According to the stratospheric atmospheric data and surface characteristics, the adjacent space of China is divided into five regions, and the key parameters of different regions are determined. The SBDART radiation transfer model is used to simulate the solar radiation and ultraviolet radiation in the near space. The simulation results show that they are affected by latitude, total ozone, vertical distribution, etc. The variation law of radiation value is more complicated. The annual and monthly solar radiation increases with the decrease of latitude, but the annual difference is opposite. The absorption of atmosphere is related to latitude, sea and land differences, showing different intensity and seasonal variation. In the ultraviolet band, the radiation over the South China Sea is the strongest, the annual difference is small, the monthly difference is very small and the summer is strong and the winter is weak, the radiation values of other regions are weak in summer, strong in winter and weak in winter, and the monthly range is bimodal, strong in spring and autumn, weak in winter and summer, and the absorption of atmosphere is affected by many factors. The vertical variation of monthly range caused by atmospheric absorption is 6, the amplitude of high and low space moon in July is the same, and the radiation value of other months is larger in the upper level.
【作者单位】：中国海洋大学物理海洋教育部重点实验室;中国科学院遥感与数字地球研究所遥感科学国家重点实验室国家环境保护卫星遥感重点实验室;中国航空综合技术研究所;中国资源卫星应用中心;
【基金】：中国科学院国家外国专家局创新团队国际合作伙伴计划项目(KZZD-EW-TZ-09);中国科学院科技创新重点部署项目(KGFZD-125-13-006) 中德合作研究项目(GZ 659) 高分专项青年创新基金项目资助
【分类号】：V520.6

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