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

Fathurochman, Irvan, Lubis, Sandro Wellyanto and Setiawan, Sonni (2017) Impact of Madden-Julian Oscillation (MJO) on global distribution of total water vapor and column ozone. Open Access IOP Conference Series: Earth and Environmental Science, 54 (Art. Nr. 012034). DOI 10.1088/1755-1315/54/1/012034.

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Abstract

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.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: No
Open Access Journal?: Yes
DOI etc.: 10.1088/1755-1315/54/1/012034
ISSN: 1755-1307
Date Deposited: 15 Feb 2017 08:21
Last Modified: 15 Feb 2017 08:21
URI: http://oceanrep.geomar.de/id/eprint/36562

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