scholarly journals Influence of the Madden-Julian Oscillation on Wintertime Extreme Snowfall and Precipitationin Japan

2022 ◽  
Author(s):  
Chiharu TAKAHASHI ◽  
Yukiko IMADA ◽  
Masahiro WATANABE
Keyword(s):  
Madden Julian Oscillation

The Madden–Julian oscillation strengthens its reach

2021 ◽  
Vol 11 (3) ◽  
pp. 183-183
Author(s):  
Baird Langenbrunner
Keyword(s):  
Madden Julian Oscillation

scholarly journals Kelvin/Rossby Wave Partition of Madden-Julian Oscillation Circulations

Climate ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 2
Author(s):  
Patrick Haertel
Keyword(s):  
Rossby Wave ◽  
Large Scale ◽  
Atmospheric Model ◽  
Circulation System ◽  
System Of Equations ◽  
Wave Component ◽  
Madden Julian Oscillation ◽  
Kelvin Wave ◽  
Realistic View ◽  
State Of Rest

The Madden Julian Oscillation (MJO) is a large-scale convective and circulation system that propagates slowly eastward over the equatorial Indian and Western Pacific Oceans. Multiple, conflicting theories describe its growth and propagation, most involving equatorial Kelvin and/or Rossby waves. This study partitions MJO circulations into Kelvin and Rossby wave components for three sets of data: (1) a modeled linear response to an MJO-like heating; (2) a composite MJO based on atmospheric sounding data; and (3) a composite MJO based on data from a Lagrangian atmospheric model. The first dataset has a simple dynamical interpretation, the second provides a realistic view of MJO circulations, and the third occurs in a laboratory supporting controlled experiments. In all three of the datasets, the propagation of Kelvin waves is similar, suggesting that the dynamics of Kelvin wave circulations in the MJO can be captured by a system of equations linearized about a basic state of rest. In contrast, the Rossby wave component of the observed MJO’s circulation differs substantially from that in our linear model, with Rossby gyres moving eastward along with the heating and migrating poleward relative to their linear counterparts. These results support the use of a system of equations linearized about a basic state of rest for the Kelvin wave component of MJO circulation, but they question its use for the Rossby wave component.

scholarly journals The Onset of Convection in the Madden–Julian Oscillation

2001 ◽  
Vol 14 (5) ◽  
pp. 780-793 ◽  
Author(s):  
Susan R. Kemball-Cook ◽  
Bryan C. Weare
Keyword(s):  
Madden Julian Oscillation ◽  
Onset Of Convection
Sign in / Sign up

Export Citation Format

Share Document