CHALLENGES AND OPPORTUNITIES IN MJO STUDIES

The MJO influences phenomena in remote areas, such as extreme precipitation in China and the western Himalayas, and the North Atlantic Oscillation (NAO) through its modulation on the western Pacific subtropical high, monsoon circulations, Rossby wave trains, subtropical jets, upper-level troughs, po...

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Bibliographic Details
Published in:Bulletin of the American Meteorological Society 2017-02, Vol.98 (2), p.ES53-ES56
Main Authors: Ling, Jian, Li, Chongyin, Li, Tim, Jia, Xiaolong, Khouider, Boualem, Maloney, Eric, Vitart, Frederic, Xiao, Ziniu, Zhang, Chidong
Format: Article
Language:English
Subjects:
Convection
Cyclones
El Nino
Extreme weather
General circulation models
Global weather
Information science
Laboratories
Mathematical models
MEETING SUMMARIES
Monsoon circulation
North Atlantic Oscillation
Numerical models
Physics
Propagation
Rain
Remote sensing
Weather
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Summary:The MJO influences phenomena in remote areas, such as extreme precipitation in China and the western Himalayas, and the North Atlantic Oscillation (NAO) through its modulation on the western Pacific subtropical high, monsoon circulations, Rossby wave trains, subtropical jets, upper-level troughs, potential vorticity anomalies, and moisture and temperature advection. Research recommendations * The statistical significance of MJO effects on global weather-climate phenomena, especially for the extreme events, needs to be rigorously tested. * Physical mechanisms for the MJO effects on NAO need to be identified. * The degree to which the MJO impacts on the Euro-Atlantic sector are reproduced by numerical models needs to be explored. * The potential impacts of El Niño on the predictability of the MJO should be further investigated. * The possible physical connection between QBO and the barrier effect of the MC on MJO propagation should be explored. Research recommendations * The barrier effect of the MC on MJO propagation should be more extensively documented in the observations and in model simulations. * Physical mechanisms for the MC barrier effect and its exaggeration in numerical models and the dynamics that determine MJO behavior over the MC need to be further explored. * The capability of general circulation models with stochastic parameterization of convection to simulate MJO convection may provide an important research opportunity. * Special attention should be paid to initiation of the primary MJO events where stochasticity may play a central role. A large volume of in situ observations (atmospheric and oceanic profiles) have...
ISSN:0003-0007
1520-0477
DOI:10.1175/BAMS-D-16-0283.1