The Tibetan Plateau Uplift is Crucial for Eastward Propagation of Madden-Julian Oscillation.

ABSTRACT: The Tibetan Plateau (TP) and Himalayas have been treated as an essential external factor in shaping Asian monsoon and mid-latitude atmospheric circulation. In this study we perform numerical experiments with different uplift altitudes using the Nanjing University of Information Science and Technology Earth System Model to examine potential impacts of uplift of the TP and Himalayas on eastward propagation of the MJO and the associated mechanisms. Analysis of experimental results with dynamics-based MJO diagnostics indicates two potential mechanisms. First, the uplift considerably enhances low-level mean westerlies in the Indian Ocean and convection in the Maritime Continent, which in turn strengthens boundary layer moisture convergence (BLMC) to the east of the MJO convective center. The in

SUBMITTER: Yang YM 

PROVIDER: S-EPMC6820537 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature