The Variability of the Tropical Diurnal Cycle Associated with the Madden-Julian Oscillation
Naoko Sakaeda
PSL Atmosphere-Ocean Processes Team
Tuesday, May 17, 2016, 2:00 pm
DSRC Room 2A-305
Abstract
Tropical precipitation varies strongly with the diurnal cycle. The underlying mechanisms are still poorly understood, especially over the tropical oceans. The diurnal cycle of precipitation can also vary in association with the Madden Julian Oscillation (MJO). Again, the associated coupling mechanisms are poorly understood. Some studies have suggested that the diurnal cycle is important for preconditioning the convective onset of the MJO, and that a better representation of the diurnal cycle in general circulation models may improve the simulation skills of intraseasonal and seasonal states. The objectives of this study are to understand how and why the diurnal cycle of precipitation and cloudiness varies with the MJO, and its potential role in driving the onset or evolution of the MJO. As a first step to understanding the associated interactions, the observed variation of the diurnal cycle of tropical cloudiness and precipitation, as inferred from TRMM precipitation and ISCCP cloud fraction measurements, with the MJO will be presented.
You must provide an accepted form of identification at the Visitor Center to obtain a vistor badge. Security personnel also inspect vehicles prior to entrance of the site. Please allow extra time for these procedures.
After receiving a badge, you must arrive at the DSRC Lobby at least 5 minutes before the seminar starts to meet your security escort. If you arrive after that time, you will not be allowed entry.
Foreign Nationals: Please email the seminar contact at least 48 hours prior to the seminar to provide additional information required for security purposes.
Seminar Contact: Richard.Lataitis@noaa.gov