doi:  10.3878/j.issn.1006-9585.2018.18080
香河地区冬季NO2光解速率的变化特征及其估算方法的建立

Variation characteristics and estimation method of NO2 photolysis rate in Xianghe during winter
摘要点击 514  全文点击 143  投稿时间:2018-06-21  修订日期:2018-10-18
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基金:  国家重点研发计划
中文关键词:  Variation characteristics and estimation method of NO2 photolysis rate in Xianghe during winter
英文关键词:  Photolysis frequency, irradiance, Xianghe, estimation formula
                    
作者中文名作者英文名单位
杜超杰DU Chaojie成都信息工程大学
赵舒曼ZHAO Shuman中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室;中国科学院大学
刘慧LIU Hui陕西省气象局
马翼宁MA Yining兰州大学大气科学学院;甘肃省干旱气候变化与减灾重点实验室
邹嘉南Zou Jianan兰州大学大气科学学院
邓小波DENG Xiaobo成都信息工程大学电子工程学院
胡波HU Bo中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室;
引用:杜超杰,赵舒曼,刘慧,马翼宁,邹嘉南,邓小波,胡波..香河地区冬季NO2光解速率的变化特征及其估算方法的建立[J].气候与环境研究
Citation:DU Chaojie,ZHAO Shuman,LIU Hui,MA Yining,Zou Jianan,DENG Xiaobo,HU Bo..Variation characteristics and estimation method of NO2 photolysis rate in Xianghe during winter[J].Climatic and Environmental Research(in Chinese)
中文摘要:
      NO2的光解速率j(NO2)是对流层化学研究中的一个重要的参数,它是对流层臭氧(O3)和OH自由基的形成关键影响因子之一。本文利用香河站2017年11月~2018年1月的观测资料对NO2的光解速率j(NO2)、太阳辐射的变化特征,及光解速率与分波段辐射的相关性进行了分析,在此基础上建立了一套适合于构建香河地区j(NO2)的参数化方案。结果表明,香河地区的j(NO2)与太阳辐射的变化趋势基本一致,日变化均呈正午高、早晚低的单峰型。香河地区冬季j(NO2)的变化范围是0.00046~0.0042 s-1,平均值为0.0026 s-1。j(NO2)与晴空指数(KS)和紫外辐射透过率(KUV)存在很好的相关性,因此,利用j(NO2)与大气质量数和晴空指数的相互依赖关系,基于KUV构建了适合于香河地区j(NO2) 的估算方程。由于总辐射是气象站的常规观测要素,晴空指数Ks更容易获取,继而建立了通过KS参数化计算j(NO2)的估算方程。利用KUV和Ks建立的j(NO2)估算方程的瞬时估算值与观测值的平均相对误差分别为6.7%和-12.9%。
Abstract:
      The NO2 photolysis frequency j(NO2) is an important parameter in tropospheric chemistry. It is one of the key factors affecting the formation of ozone and OH radicals in troposphere. The variation of j(NO2) and solar radiation, and the correlation between photolysis rate and sub-band solar radiation were analyzed using the observational data in XiangHe from November 2017 to January 2018. On this basis, a parameterized scheme suitable for reconstructing j(NO2) in Xianghe area was constructed. The results indicate that the variation trend of j(NO2) and solar radiation in Xianghe is basically the same, and the diurnal variations are all unimodal with high noon and small morning and evening. The variation range of j(NO2) in winner is 0.00046 ~ 0. 0042s-1, with a mean of 0.0026 s-1. Since J(NO2) correlates well with clear sky index (KS) and transmittance of ultraviolet radiation (KUV), an experimental estimating equation based on KUV was established using the correlation between j(NO2) , air mass number and clear air index.. Considering the clear sky index KS is more easily obtained and global radiation is a conventional observation of meteorological stations, an experimental estimating equation was established based on KS. The instantaneous value of j(NO2) can be estimated by the equations established using KUV and Ks respectively, and the mean relative errors between instantaneous values obtained by the two equations and observed value are 6.7% and -12.9%, respectively.
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