高能电子沉降对北半球冬季中高层大气活性氮和臭氧影响的数值模拟  

Numerical Simulation of the Effect of Energetic Electron Precipitation on Reactive Nitrogen and Ozone in the Middle-upper Atmosphere of the Northern Hemisphere during Winter

作　　者：朱志鹏[1] 周立旻[1,2] 郑祥民 ZHU Zhipeng;ZHOU Limin;ZHENG Xiangmin(Key Laboratory of Geographic Information Science,Ministry of Education,School of Geographical Sciences,East China Normal University,Shanghai 200241,China;Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,CAS,Beijing 100029,China)

机构地区：[1]华东师范大学地理科学学院地理信息科学教育部重点实验室,上海200241 [2]中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029

出　　处：《地球与环境》2020年第5期537-543,共7页Earth and Environment

基　　金：国家自然科学基金项目(41571040)。

摘　　要：高纬度地区平流层臭氧浓度对极地地表生物地球化学过程影响巨大,近年来高能电子沉降对大气臭氧和活性氮的影响成为新的关注点。本工作基于化学-气候耦合模式SOCOL3.0,参考第六次耦合模式比较计划(CMIP6)推荐的低能量电子(LEE)和中能量电子(MEE)的参数化方案构建了SOCOL-EPP-ECNU化学-气候模式,利用该模式对高能电子沉降对中高层大气活性氮(NOx)和臭氧的影响进行了敏感性试验和评估。结果表明,中高层大气对于LEE效应产生的NOx通量的上边界条件设定敏感度很高,该设定对模式模拟效果有决定性意义。加入LEE和MEE通量后,模式对北半球冬季平流层中下层NOx浓度的模拟精度得到提高,同时也使北半球冬季平流层中下层气温的模拟得到改善。模拟结果指示,加入LEE和MEE,进一步完善对高能粒子沉降的模式描述,有助于提高模式对大气化学成分及气候要素模拟的准确度。The stratospheric ozone concentration at high latitudes has a great influence on biogeochemical processes at the polar surface.In recent years,the influence of energetic electron precipitation on atmospheric ozone and reactive nitrogen has become a new focus.Based on the coupled chemistry-climate model SOCOL3.0 and the parameterization schemes of low energy electron(LEE)and middle energy electron(MEE)recommended by the sixth Coupled Model Intercomparison Project(CMIP6),the SOCOL-EPP-ECNU model was established.Using this model,the sensitivity test and the evaluation of the effect of energetic electron precipitation on reactive nitrogen(NOx)and ozone in the middle-upper atmosphere were performed.The results showed that the model is highly sensitive to the upper boundary condition of the NOx flux produced by the LEE effect,which is of decisively significance to the simulation effect of the model.The model simulations for NOx concentrations and temperature in the middle and lower stratosphere of the Northern Hemispheric are improved after adding limits of LEE and MEE fluxes.The simulation results indicated that the model description of energetic particle precipitation can be further improved by considering LEE and MEE,and such is helpful to improve the accuracy of the model in simulating atmospheric chemical compositions and climatic elements.

关 键 词：高能电子沉降 活性氮(NOx) 臭氧 数值模拟 化学-气候模式 

分 类 号：P461[天文地球—大气科学及气象学]