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contributor authorPark, Hye-Jin
contributor authorKryjov, Vladimir N.
contributor authorAhn, Joong-Bae
date accessioned2019-09-19T10:10:33Z
date available2019-09-19T10:10:33Z
date copyright9/7/2018 12:00:00 AM
date issued2018
identifier otherjcli-d-17-0816.1.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4262381
description abstractAbstractThe seasonal predictability of Asian summer monsoon indices characterizing horizontal and vertical zonal wind shear is investigated using 1-month-lead hindcast datasets from seven coupled global circulation models (CGCMs) participating in the operational multimodel ensemble (MME) seasonal prediction system of the Asia?Pacific Economic Cooperation Climate Center (APCC) for the 1983?2010 period. The summer monsoon indices analyzed in this study represent the South Asian summer monsoon (SASM), western North Pacific summer monsoon (WNPSM), and the newly defined northeastern Asian summer monsoon (NEASM). For the WNPSM and NEASM indices, we also analyze the prediction skill of the index components separately. The study demonstrates that the operational APCC MME system reliably predicts most of the summer monsoon indices and their components, with correlation coefficients exceeding the 99% confidence level. Analysis of the ocean sources of the prediction skill of the indices reveals that the strong relationships of most of the monsoon indices and their components with sea surface temperature (SST) are not confined to the equatorial Pacific but rather are dispersed throughout the World Ocean, with the leading role played by the north Indian Ocean SST anomalies. This conclusion is supported by the analysis of correlations between the monsoon indices and the tropical SST indices. The correlations between the SST anomalies and all the summer monsoon indices in the MME predictions are stronger than those in the observations. However, overestimation of the role of the ENSO-related SST anomalies in the seasonal model hindcasts results in some predictability deterioration of the SASM and NEASM indices.
publisherAmerican Meteorological Society
titleOne-Month-Lead Predictability of Asian Summer Monsoon Indices Based on the Zonal Winds by the APCC Multimodel Ensemble
typeJournal Paper
journal volume31
journal issue21
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-17-0816.1
journal fristpage8945
journal lastpage8960
treeJournal of Climate:;2018:;volume 031:;issue 021
contenttypeFulltext


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