Sensitivity of Kelvin waves and Madden-Julian oscillation to convective downdrafts in the NCAR-CAM3
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چکیده
منابع مشابه
Tropical Cyclogenesis Associated with Kelvin Waves and the Madden–Julian Oscillation
The Madden–Julian oscillation (MJO) influences tropical cyclone formation around the globe. Convectively coupled Kelvin waves are often embedded within the MJO, but their role in tropical cyclogenesis remains uncertain. This case study identifies the influences of the MJO and a series of Kelvin waves on the formation of two tropical cyclones. Typhoons Rammasun and Chataan developed in the weste...
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[1] The Madden-Julian Oscillation (MJO) is the dominant component of the intraseasonal (30–90 days) variability in the tropical atmosphere. It consists of large-scale coupled patterns in atmospheric circulation and deep convection, with coherent signals in many other variables, all propagating eastward slowly ( 5 m s ) through the portion of the Indian and Pacific oceans where the sea surface i...
متن کاملMoisture Modes and the Madden-Julian Oscillation
Moisture mode instability is thought to occur in the tropical oceanic atmosphere when precipitation is a strongly increasing function of saturation fraction (precipitable water divided by saturated precipitable water) and when convection acts to increase the saturation fraction. A highly simpli ed model of the interaction between convection and large-scale ows in the tropics suggests that there...
متن کاملModulation of radiative heating by the Madden‐Julian Oscillation and convectively coupled Kelvin waves as observed by CloudSat
[1] The vertical distribution of radiative heating affects the moist static energy budget and potentially the maintenance and propagation of the Madden‐Julian Oscillation (MJO). This paper usesCloudSat data to examine the radiative heating climatology in the tropics and the vertical structure of its modulation by the MJO and convectively coupled Kelvin Waves (KWs). Composites of active regions ...
متن کاملPotential Predictability of the Madden–julian Oscillation
JANUARY 2003 AMERICAN METEOROLOGICAL SOCIETY | S ince its discovery by Madden and Julian (1971, 1972) over two decades ago, the Madden–Julian oscillation (MJO) has continued to be a topic of significant interest due to its complex nature (Madden and Julian 1994) and the wide range of phenomena with which it interacts. The onset and break activity of the Asian–Australian monsoon system is strong...
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ژورنال
عنوان ژورنال: Atmospheric Science Letters
سال: 2011
ISSN: 1530-261X
DOI: 10.1002/asl.334