摘要
奇氧族光化学模型是描述臭氧浓度与氧红外波段气辉体发射率关系的微分方程,结合气辉遥感数据可反演大气臭氧浓度剖面。介绍了以大气动力学与奇氧族光化学为基本原理的O2(a1Δg)光化学模型。采用一种新提出的斜路径积分法计算了光学厚度,从而完成了光化学模型反应系数的解算。针对系数求解计算量巨大的问题,提出建立纬度-高度-太阳天顶角三维系数查找表。利用传统方法和斜路径积分法计算光学厚度比较结果表明,随天顶角增加,偏差由天顶角80°时12%急剧增加至88.7°时的100%,且新方法不会出现负值等结果。系数查找表的建立,可省去实际应用中重复设定参数进行的复杂计算过程。
Photochemical model is series differential equations that combine ozone density and airglow volume emission rate at oxygen infrared atmospheric band,which can be used to retrieve ozone profile from remotely sensed airglow measurement.The O2（a1Δg）photochemical model based on atmospheric kinetics and photochemistry of odd oxygen family is overviewed.A new slant path integration method is proposed to calculate optical depth for solving the photolysis coefficients.A practical latitude-altitude-SZA（solar zenith angle）look-up table method for determination photolysis coefficients is introduced to dealing computationally intensive calculations.The results of comparison between conventional and new method for calculating optical depth suggested that,the deviation increases from 12% with SZA of 80° greatly to 100% with SZA of 88.7°.Especially,comparing to conventional method,it will not lead to minus value by new method.The scheme that establishes a look-up table will avoid the complex procedure,and it allows looking up the coefficients rather than setting parameters and calculating each time.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第6期1485-1490,共6页
Journal of Jilin University：Earth Science Edition
基金
国家'863'计划项目(2006AA12Z102)
吉林大学研究生创新基金项目(20091023)
关键词
奇氧族
光化学模型
光解系数
遥感
odd oxygen family； photochemical model； photolysis coefficient； remote sensing
