Precursors of MJO-Crossing (MJO-C) and MJO-Blocking (MJO-B) over The Maritime Continent Based on Moisture Transport

Authors

  • Akhmad Fahim Pusat Meteorologi Publik, Agency for Meteorology Climatology and Geophysics (BMKG)
  • Nurjanna Joko Trilaksono Atmospheric Research Group, Faculty Earth Science and Technology, Bandung Institute of Technology (ITB)

DOI:

https://doi.org/10.31172/jmg.v24i2.906

Keywords:

propagasi MJO, MJO-C, MJO-B, transpor kelembapan

Abstract

Research on MJO propagation that is blocked when crossing the Maritime Continent (MC) is a complex problem. This research aims to determine the precursors of MJO-Crossing (MJO-C) and MJO-Blocking (MJO-B) based on moisture transport analysis. Hovmöller analysis on MJO-C and MJO-B is performed using precipitation data retrieved from the TRMM satellite (3B42v7) in the ONDJFM period 1998-2015 to characterize the propagation of MJO-C and MJO-B. The difference between MJO-C and MJO-B propagation is further investigated using specific humidity and horizontal wind data from ERA-Interim ECMWF to examine the moisture source and vertical structure of specific humidity in MJO-C and MJO-B. Additionally, we conducted wind divergence analysis at 700hPa to identify the characteristics of wind patterns in MJO-C and MJO-B events. Our investigation revealed that during the precursor period (day -15 to -5) or before MJO arrived at the Maritim Continent, there was a weakening of moisture supply in MJO-B events due to the existence of a westward-propagating dry anomaly. This dry anomaly mixed with the moist anomaly of MJO convection could reduce the intensity of moisture and dissipate MJO convection. The westward-propagating dry anomaly indicates the influence of Equatorial Rossby (ER) waves, which can inhibit MJO propagation across the Maritime Continent.

Author Biographies

Akhmad Fahim, Pusat Meteorologi Publik, Agency for Meteorology Climatology and Geophysics (BMKG)

Kedeputian Meteorologi, Pusat Meteorologi Publik

Nurjanna Joko Trilaksono, Atmospheric Research Group, Faculty Earth Science and Technology, Bandung Institute of Technology (ITB)

Faculty Earth Science and Technology, Bandung Institute of Technology (ITB)

References

Lau, W. K., dan D. E. Waliser. Intraseasonal Variability of the Atmosphere-Ocean Climate System: Springer, New York, 2005.

Zhang, C. Madden-Julian oscillation. Reviews of Geophysics, 43 RG2003, 2005.

Madden, R. A., dan P. R. Julian. “Detection of a 40–50 days oscillation in the zonal wind in the tropical Pacific”. Journal of Atmospheric Science, 28, 702–708, 1971.

Wheeler, M., dan G. N. Kiladis. “Convectively coupled equatorial waves: Analysis of clouds and temperature in the wavenumber–frequency domain”. Journal of Atmospheric Science., 56, 374–399, 1999.

Hsu, H.H. dan Lee, M.Y. “Topographic effects on the eastward propagation and initiation of the Madden-Julian oscillation”. Journal of Climate, 18, 795–809, 2005.

Hagos, S.M., Zhang, C., Feng, Z., Burleyson, C.D., De Mott, C., Kerns, B., Benedict, J.J. dan Martini, M.N. “The impact of the diurnal cycle on the propagation of Madden-Julian oscillation convection across the Maritime Continent”. Journal of Advances in Modeling Earth Systems, 8, 1552–1564, 2016.

Majda, A.J. dan Yang, Q. “A multiscale model for the intraseasonal impact of the diurnal cycle over the Maritime Continent on the Madden-Julian oscillation”. Journal of the Atmospheric Sciences, 73, 579–604, 2016.

Kim, D., Kug, J.S. dan Sobel, A.H. “Propagating versus nonpropagating Madden-Julian oscillation events”. Journal of Climate, 27, 111–125, 2014.

Zhang, C. dan Ling, J. “Barrier effect of the Indo-Pacific Maritime Continent on the MJO: perspectives from tracking MJO precipitation”. Journal of Climate, 30, 3439–3459, 2017.

Feng, J., Li, T. dan Zhu, W. “Propagating and nonpropagating MJO events over Maritime Continent”. Journal of Climate, 28, 8430–8449, 2015.

Wu, Z. “A shallow CISK, deep equilibrium mechanism for the interaction between large-scale convection and large-scale circulation in the Tropics”. Journal of the Atmospheric Sciences, 60, 377–392, 2003.

Hsu, P.-C., dan T. Li. “Role of the boundary layer moisture asymmetry in causing the eastward propagation of the Madden Julian Oscillation”. Journal of Climate, 25 (14), 4914-4931, 2012.

Huffman, G., R. Adler., D. Bolvin., G. Gu., E. Nelkin., K. Bowman, Y. Hong., E. Stocker., dan D. Wolff. “The TRMM multisatellite precipitation analysis (TMPA): Quasi-global, multiyear, combined-sensor precipitation estimates at fine scales”. Journal of Hydrometeorology, 8, 38–55, 2007.

Tropical Rainfall Measuring Mission (TRMM) (2011), “TRMM (TMPA/3B43) Rainfall Estimate L3 1 month 0.25 degree x 0.25 degree V7”, Greenbelt, MD, Goddard Earth Sciences Data and Information Services Center (GES DISC), Internet : http://disc.sci.gsfc.nasa.gov/giovanni diakses pada tanggal 10 Juli 2020, 10.5067/TRMM/TMPA/MONTH/7.

European Centre for Medium-range Weather Forecast (ECMWF) (2011): The ERA-Interim reanalysis dataset 0.75 degree x 0.75 degree daily product pressure level, Copernicus Climate Change Service (C3S) , Internet: https://apps.ecmwf.int/datasets/data/interim-full-daily/levtype=pl/, (diakses pada tanggal 5 Agustus 2020).

Kerns, B. W., dan S. S. Chen. “Large-scale precipitation tracking and the MJO over the Maritime Continent and Indo-Pacific warm pool”. J. Geophys. Res. Atmos., 121, 8755–8776, 2016.

Fasullo, J., dan P. J. Webster. “A hydrological definition of the Indian summer monsoon onset and withdrawal. J. Climate, 16, 3200–3211, 2003.

Banacos, P.C. dan Schultz, D.M. “The Use of Moisture Flux Convergence in Forecasting Convective Initiation: Historical and Operational Perspectives”. Forecaster’s Forum. Weather and Forecasting, 20, 351-366, 2005.

DeMott, C. A., B. O. Wolding, E. D. Maloney, dan D. A. Randall. “Atmospheric mechanisms for mjo decay over the maritime continent”. J. of Geophys Res. Atmos., 123 (10), 5188–5204, 2018.

Adames, A. F., dan D. Kim. “The MJO as a dispersive, convectively coupled moisture wave: Theory and observations”. Journal of the Atmospheric Sciences, 73 (3), 913–941, 2016.

Wang, B., G. Chen, dan F. Liu. “Diversity of the Madden-Julian Sscillation”. Science Advances, 5 (7), 2019.

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Published

2024-03-17

How to Cite

Fahim, A., & Trilaksono, N. J. (2024). Precursors of MJO-Crossing (MJO-C) and MJO-Blocking (MJO-B) over The Maritime Continent Based on Moisture Transport. Jurnal Meteorologi Dan Geofisika, 24(2), 87–94. https://doi.org/10.31172/jmg.v24i2.906

Issue

Vol. 24 No. 2 (2023)

Section

Article

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Copyright (c) 2024 Akhmad Fahim, Nurjanna Joko Trilaksono

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