DATA PROCESSING EXPERIMENTS TO KNOW THE MADDEN JULIAN OSCILLATION (MJO) PROPAGATION DIVERSITY
Madden-Julian Oscillation (MJO) is a convective phenomenon with intraseasonal variability of about 30-60 days in the tropics. MJO propagates from the Indian Ocean to the Western Pacific Ocean, when the MJO propagates there are some differences in the characteristics of the propagation that occur. MJ...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68406 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Madden-Julian Oscillation (MJO) is a convective phenomenon with intraseasonal variability of about 30-60 days in the tropics. MJO propagates from the Indian Ocean to the Western Pacific Ocean, when the MJO propagates there are some differences in the characteristics of the propagation that occur. MJO initiation does not only occur in the Indian Ocean but also in the maritime continent and the Western Pacific Ocean. Therefore, in this study an experiment was carried out to find the characteristics of MJO propagation in addition to the Indian Ocean, namely on the maritime continent and the Western Pacific Ocean using OLR data and also wind convergence.
In this study, the identification of MJO events and the grouping of MJOs based on their characteristics in propagation will be carried out. The data used are NCEP/NCAR zonal and meridional wind reanalysis data to calculate the convergence value, spatiotemporal Outgoing longwave radiation (OLR) data, MSWEP rainfall data by adapting existing methods in previous studies so that the characteristics of MJO propagation and their effects on the phenomenon can be known. convective waves that occur in the Indian Ocean, the Maritime Continent, and the Pacific Ocean.
The results of this study indicate that the characteristics of MJO propagation in the Indian Ocean are divided into 4 main characteristics as in previous studies. For the Maritime Continent, there are two unique propagations, namely there is an MJO signal that appears on the maritime continent that does not propagate (IMC-S), and propagates eastward to the West Pacific Ocean (IMC-P). The MJO events identified in the Western Pacific Ocean have propagation characteristics similar to those in the Indian Ocean with one unique event, namely the MJO signal that strengthens in the western Pacific Ocean and is also dissipated in the western Pacific Ocean (IWP-S).
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