Impact of Madden-Julian Oscillation (MJO) on global distribution of total water vapor and column ozone

3rd International Symposium on LAPAN-IPB Satellite For Food Security and Environmental Monitoring 2016

地球科学;轻工业;生态环境科学

Fathurochman, Irvan^1 ; Lubis, Sandro W.^2 ; Setiawan, Sonni^1

Department of Geophysics and Meteorology, Bogor Agricultural University (IPB), Indonesia^1

Physics of the Atmoshpere, GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany^2

关键词: Distribution of water;    Global distribution;    Intra-seasonal variabilities;    Madden-Julian oscillation;    Total column ozone;    Total precipitable water;    Tropical convection;    Tropical troposphere;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/54/1/012034/pdf
DOI  :  10.1088/1755-1315/54/1/012034

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The Madden-Julian Oscillation (MJO) is the leading mode of intra-seasonal variability in the tropical troposphere, characterized by an eastward moving 'pulse' of cloud and rainfall near the equator. In this study, total precipitable water (TPW) and total column ozone (TCO) datasets from ECMWF ERA-Interim reanalysis were used to analyse the impact of the MJO on the distribution of water vapor and column ozone in the tropics from 1979 to 2013. The results show that seasonal variations of TPW modulated by the MJO are maximized in the tropics of about 10°S-10°N during boreal winter, while the variation in TCO is maximized in the mid-latitudes of about 30°S - 40°N in the same season. The composite analysis shows that MJO modulates TPW and TCO anomalies eastward across the globe. The underlying mechanism of the MJO's impact on TPW is mainly associated with variation of tropical convection modulated by the MJO, while the underlying mechanism of the MJO's impact on TCO is mainly associated with an intra-seasonal variability of tropopause height modulated by the MJO activity. This knowledge helps to improve the prediction skill of the intra-seasonal variation of water vapor and column ozone in the tropics during boreal winter.