Title | : | The Influence of Madden–Julian Oscillation on Local-Scale Phenomena over Indonesia during the Western North Pacific and Australian Monsoon Phases |
Author | : |
IDA PRAMUWARDANI (1) Prof. Dr. Hartono, DEA., DESS. (2) Prof. Dr. Sunarto, M.S. (3) Ardhasena Sopaheluwakan (4) |
Date | : | 2018 |
Keyword | : | MJO, local factors, precipitation rate, multilevel wind MJO, local factors, precipitation rate, multilevel wind |
Abstract | : | In this study, geographical Madden–Julian oscillation (MJO) propagation in association with precipitation rate was obtained using lag correlation applied to HPSLULFDORUWKRJRQDOIXQFWLRQ(2)DQDO\VLVPRGHVDQGRIÀOWHUHG0-2GDWD7KHSUHFLSLWDWLRQUDWHRYHU,QGRQHVLDZDVSURYLGHGDWGD\WKURXJKGD\LQÀYHGD\VWHSVGXULQJWKH'HFHPEHU-DQXDU\DQG)HEUXDU\'-):HVWHUQ1RUWK3DFLÀF(WNP) and July, August and September (JAS) Australian (AU) monsoon phases. Connection with local atmospheric factors was then sought through comparison of local precipitation, represented by 3-hourly precipitation, and dynamical processes, represented by multilevel wind, at seven locations across Indonesia. The results show a global MJO contribution toward local-scale phenomena in Tangerang, Surabaya, and Makassar during the DJF-WNP monsoon phase and in Padang, Medan, Surabaya, Makassar, and Kupang during the JAS-AU monsoon phase. Meanwhile, a lack of MJO contribution toward local factors is presumably due to other local through wider DWPRVSKHULFVFDOHSKHQRPHQDZKLFKDUHVXVSHFWHGWRKDYHPRUHLQÁXHQFHSDUWLFXODUO\in Medan, Padang, Manado, and Kupang during the DJF-WNP monsoon phase, and in Manado and Tangerang during the JAS-AU monsoon phase. This research uses a dataset of 15-year series of daily and three-hourly Tropical Rainfall Measuring Mission (TRMM) (3B42 V7 derived) measurements, 850 hPa zonal wind measurements from 30-year reanalysis data from the ERA-Interim reanalysis dataset, and a 15-year series of 12-hourly observational soundings data from seven stations of the Indonesian Meteorological Climatological and Geophysical Agency (BMKG). |
Group of Knowledge | : | Geografi |
Original Language | : | English |
Level | : | Nasional |
Status | : |
Published
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Hartono-Forum Geografi-2018.pdf
Document Type : [PAK] Full Dokumen
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