Anisotropy of stratospheric irregularities inferred from stellar scintillation measurements by GOMOS/ENVISAT

Turbulence, Atmosphere and Climate Dynamics

生态环境科学

Kan, V.^1 ; Sofieva, V.F.^2

A M Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russia^1

Finnish Meteorological Institute, Helsinki, Finland^2

关键词: Air density;    Anisotropy coefficients;    Double stars;    ENVISAT;    Global ozone monitoring by occultation of stars;    Scintillation measurements;    Small scale;    Stellar occultation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/231/1/012026/pdf
DOI  :  10.1088/1755-1315/231/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Abstact. In this paper, we discuss the methods for evaluation of the anisotropy of small-scale atmospheric irregularities using satellite stellar occultation measurements. These methods are based on coherency analysis of bi-chromatic scintillation observed in occultations of double stars and in tangential (horizontal) occultations. These methods are applied to scintillation measurements by two fast photometers of the GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board ENVISAT. The estimates of the anisotropy of air density irregularities generated by saturated gravity waves are obtained for altitudes 30-45 km. The anisotropy coefficient varies from 50 down to 10 with decreasing vertical scales from 60 m to 10 m.