Open AccessThe effect of the quasi‐biennial oscillation on the Madden–Julian oscillation in the Met Office Unified Model Global Ocean Mixed Layer configuration
Author(s) -
Lee Joshua C. K.,
Klingaman Nicholas P.
Publication year - 2018
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.816
Subject(s) - madden–julian oscillation , quasi biennial oscillation , equator , climatology , oscillation (cell signaling) , environmental science , tropopause , atmospheric sciences , boreal , geology , stratosphere , meteorology , latitude , physics , convection , geodesy , biology , genetics , paleontology
Using multi‐decadal simulations, we investigate the relationship between the quasi‐biennial oscillation (QBO) and the Madden–Julian oscillation (MJO) in the Global Ocean Mixed Layer configuration of the Met Office Unified Model (MetUM‐GOML1) at two horizontal resolutions (approximately 200 and 90 km at the equator). MetUM‐GOML1 produces a weak and insignificant correlation between QBO winds and mean MJO amplitude in boreal winter, in contrast to the significant anti‐correlation in reanalysis. While reanalysis shows the easterly QBO favors stronger Maritime Continent MJO activity, MetUM‐GOML1 displays stronger West Pacific MJO activity. The biased QBO–MJO relationship in MetUM‐GOML1 may be due to weak QBO‐induced temperature anomalies in the tropical tropopause layer, or to errors in MJO vertical structure.