East Asian-Australian Monsoon Variations and their Impacts on Regional Climate during Boreal Summer

Abstract

The East Asian summer monsoon (EASM) and the Australian winter monsoon (AWM) are two important components of the Asian−Australian monsoon system during boreal summer. The simultaneous variations of these two monsoons would have remarkable impacts on climate in the Asian−Australian region. Using the reanalysis datasets, we investigated the mechanisms of variation and impacts of East Asian−Australian monsoons (EAAMs). The singular value decomposition (SVD) is performed of the June−July−August (JJA) mean anomalous zonal wind for AWM as the left field and JJA mean anomalous meridional wind for EASM as the right field after both El Niño−Southern Oscillation and India Ocean Dipole signals are filtered out. Our results demonstrate that Corresponding author: Zhaoyong Guan, Key Laboratory of Ministry of Education for Meteorological Disaster/International Joint Laboratory on Climate and Environment Change/ Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China E-mail: guanzy@nuist.edu.cn J-stage Advance Published Date: 8 December 2019 Journal of the Meteorological Society of Japan Vol. 98, No. 2 284