The Impact of MJO-C and MJO-B Upon Sea Surface Temperature and Rainfall in Indonesia (original) (raw)
Related papers
2016
Intraseasonal variability of precipitation over the Indonesian Maritime Continent (IMC) is related mainly to the Madden–Julian oscillation (MJO). The MJO enhances and suppresses precipitation around the IMC according to its phase. This study examined the relationship between the MJO and the stable isotope of the precipitation over the IMC. Observations and simulation data from an isotope circulation model and colored moisture analysis (ICM/CMA) were used. Temporal analyses of the observed and simulated data showed that an active MJO stage, associated with a positive precipitation anomaly over the IMC, was correlated with the depletion of δOp at all stations. Spatial analysis of the total column precipitable water from the ICM/CMA revealed that during the MJO phase 3−5, water of Indian Ocean origin reached as far as western parts of Borneo and Bali. For other part of the IMC in these phases, vapor was refreshed from the South Maritime Continent Ocean and North Maritime Continent Ocea...
Journal of Physics: Conference Series
Indonesia Maritime Continent (IMC) is one the most important region at the equator which affected by many atmospheric phenomena, especially Madden-Julian Oscillation and Monsoon. Asian Winter Monsoon causes the increasing of rainfall in several places in Indonesia in December-January-February (DJF), and since MJO related to a propagation of convective cloud, somehow it affects the rainfall variability in equator, especially over Indonesia. Interaction of both phenomena simultaneously bring rainfall is increasing in Indonesia, especially in Western Part of Indonesia. Therefore, a research about the impact of MJO in rainfall especially in Bandung and other cities over Indonesia is important. This study aims to investigate impacts of MJO events on the rainfall variability in Bandung and other cities focusing when Asian Winter Monsoon (December-January-February/DJF) for period of DJF 2002/03-DJF 2012/13 passing over Indonesia. The results show that from 10 MJO events in period DJF 2002/03-DJF 2012/13, the event increased the rainfall continuously in phase 3, phase 4, and phase 5. In phase 3, the increasing happened in every station except Supadio in Pontianak with the total precipitation > 30 mm/day. The condition of rainfall in phase 4 fluctuates in every station, but with the dominant increasing in Equator. In phase 5, the decreasing of rainfall happened in North of the Equator and Equator, while in South of Equator, the rainfall in Cengkareng Station in Jakarta increased about 20% but decreased about-42% in Bandung Station.
Influence of the Madden-Julian Oscillation on Indonesian rainfall variability in austral summer
International Journal of Climatology, 2009
The impact of the Madden-Julian Oscillation (MJO) on Indonesian rainfall variability in austral summer is analysed by using the daily station rain gauge data and Tropical Rainfall Measuring Mission precipitation data for the periods of 1979 through 1990 and 1998 through 2006, respectively. Composite analysis of 21 and 16 MJO events identified in former respective periods shows that the rainfall variability over Indonesia is significantly affected by the phase of eastward-propagating MJO. Excess rainfall is brought during 'wet' phase, when the convective activity reaches its maximum with enhanced low-level wind convergence over the region. In addition, the impact of MJO tends to be more profound over the surrounding seas than over the large islands of this region. The positive rainfall anomaly over the eastern Indian Ocean and Java Sea during the wet phase is up to 5 mm/day (60% of the long-term mean) as a pentad mean, while it is about 1-3 mm/day (10-30%) over Borneo and Java.
Forum Geografi, 2018
In this study, geographical Madden–Julian oscillation (MJO) propagation in association with precipitation rate at day -10 through day +10 in five-day steps during the December, January, and February (DJF) Western North Pacific (WNP) and July, August and September (JAS) Australian (AU) monsoon phases over Indonesia was obtained using lag correlation applied to empirical orthogonal function (EOF) analysis modes 1 and 2 of filtered MJO data. 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 ...
Proceeding ofInternational Symposium on the 15th Anniversary of the Equatorial Atmosphere Radar (EAR), 2016
Indonesia's rainfall can't be separated from the influence of global climate phenomena, including Madden-Julian Oscillation (MJO). Based on previous research, the active phase of MJO has a correlation with the high intensity of rainfall. MJO caused the high intensity of rainfall with saturated water vapor submissions from the Indian Ocean. This study aims to determine the effect of MJO activity when the occurrence of extreme rainfall events that caused flooding and landslides in the Western Region of Indonesia on June 2016. The data used are daily data Real Time Multivariate MJO (RMM1 and RMM2), Pentad MJO index, and hourly precipitation data from Global satellite Mapping (GSMaP), while the software used are GrADS (spatial analysis), Matlab (temporal analysis), and Microsoft Office. The resultsshowed that rainfall intensityof flood events in Padang (00.93S & 100.33E) that occurred on June 16, is high enough since 4-23 WIB, in the range 10-21 mm/hr. Meanwhile flood events and landslides in Purworejo (07.70S & 110.00E) on June 18, also showed high rainfall intensity from 4-22 WIB, in the range 12-21 mm/hr. The intensity of rainfall is included in the category of heavy to very heavy which causing floods. But, the value of RMM1 and RMM2 were in phase 2 and 3 (Indian Ocean), It have not yet entered thewestern part of Indonesian Maritime Continent (phase 4). The pentad MJO index values also classified in the category of weak in phase 4 (0.36), so the MJO has no significant effect on the flood events in the western region of Indonesia.
The correlation between sea surface temperature and MJO incidence in Indonesian waters
IOP Conference Series: Earth and Environmental Science
Madden-Julian Oscillation (MJO) is a large-scale atmospheric phenomenon that crosses the equator within range of 15º North to 15º South and moves from West to East respectively. The MJO is closely related to weather anomalies (excess rainfall) that occur during the dry season in Indonesia and can make an unstable environment due to the sustainability of several staples plantation. This phenomenon is suspected to be related directly to the occurrence of sea surface temperature fluctuations in equatorial areas. This research aims to analyze the relation of sea surface temperature fluctuation in Indonesian waters with the MJO incidence, through the empirical method with statistical calculation, based on Sea Surface Temperature (SST) and Outgoing Longwave Radiation (OLR) which is representing the MJO incidence. The data of these two variables were obtained from ESRL NOAA, with a range of 35 years, from 1982 to 2016. With the hypothesis that the two data are directly correlated to each other, by using Bandpass filtering scheme, the filtering results then analyzed using simple linear regression method. It founded that the correlation between these two variables can reach up to 80.2%, and it means that the MJO incidence is directly correlated with SST in the Indonesian waters respectively.
Journal of Climate
The Madden–Julian oscillation (MJO) often causes the onset of the Indonesian–Australian summer monsoon (IASM) over Indonesia and northern Australia. In the present study, a composite analysis is conducted to reveal the detailed IASM onset process and its air–sea interactions associated with the first-branch eastward-propagating MJO (FEMJO) based on 30-yr ERA-Interim data, satellite-derived sea surface temperature (SST), outgoing longwave radiation (OLR), and SODA3 ocean reanalysis. The results distinctly illustrate the phase-locked relationships among the persistent sea surface warming north of Australia, the FEMJO, and the established westerlies. It is found that the SST to the north of Australia reaches its annual maximum just before the onset of the summer monsoon. The oceanic surface mixed layer heat budget discloses that this rapid warming is primarily produced by the enhanced surface heat flux. In addition, this premonsoon sea surface warming increases the air specific humidit...
SOLA, 2013
An extreme precipitation/flood event that occurred in the Indo nesian capital of Jakarta on Java Island in the middle of January 2013 coincided with an active phase of the MaddenJulian Oscil lation (MJO) with the enhanced convective phase centered on the western Pacific. Analysis of upperair sounding data showed that strong to moderate upper westerly to northwesterly winds persist ed over the island prior to and during the heavy rain event, which were caused by the active phase of the MJO, while northwesterly winds occurred near the surface. Meteorological radar observa tions indicated regular genesis of convection at night over the sea to the northwest of the island, and southeastward propagation over the island from the nighttime to early morning. The movement of the precipitation systems was dominated by the upper north westerly winds. The results suggest that the eastward propagation of an active phase of the MJO exerted a strong influence on the formation of extreme heavy rain over western Java Island. (Citation: Wu, P., A. A. Arbain, S. Mori, J.I. Hamada, M. Hattori, F. Syamsudin, and M. D. Yamanaka, 2013: The effects of an active phase of the MaddenJulian Oscillation on the extreme precipitation event over western Java