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Atmosphere 2016, 7(2), 28;

Sub-Seasonal Prediction of the Maritime Continent Rainfall of Wet-Dry Transitional Seasons in the NCEP Climate Forecast Version 2

Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China
Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou 510275, China
Institute of Plateau Meteorology, China Meteorological Administration, and Key Laboratory of Heavy Rain and Drought-Flood Disasters in Plateau and Basin of Sichuan Province, Chengdu 610071, China
Author to whom correspondence should be addressed.
Academic Editor: John Boland
Received: 30 November 2015 / Revised: 3 February 2016 / Accepted: 3 February 2016 / Published: 15 February 2016
(This article belongs to the Special Issue Climate Variable Forecasting)
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This study investigates the characteristics and prediction of the Maritime Continent (MC) rainfall for the transitional periods between wet and dry seasons. Several observational data sets and the output from the 45-day hindcast by the U.S. National Centers for Environmental Prediction (NCEP) Climate Forecast System version 2 (CFSv2) are used. Results show that the MC experiences a sudden transition from wet season to dry season (WTD) around the 27th pentad, and a gradual transition from dry season to wet season (DTW) around the 59th pentad. Correspondingly, the westerlies over the equatorial Indian Ocean, the easterlies over the equatorial Pacific Ocean, and the Australia High become weaker, contributing to weakening of the convergence over the MC. The subtropical western Pacific high intensifies and extends northeastward during the WTD. The Mascarene High becomes weaker, an anomalous anticyclonic circulation forms over the northeast of the Philippines, and an anomalous low-level convergence occurs over the western MC during the DTW. The NCEP CFSv2 captures the major features of rainfall and related atmospheric circulation when forecast lead time is less than three weeks for WTD and two weeks for DTW. The model predicts a weaker amplitude of the changes in rainfall and related atmospheric circulation for both WTD and DTW as lead time increases. View Full-Text
Keywords: the maritime continent; transitional periods; rainfall prediction the maritime continent; transitional periods; rainfall prediction

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Zhang, T.; Yang, S.; Jiang, X.; Dong, S. Sub-Seasonal Prediction of the Maritime Continent Rainfall of Wet-Dry Transitional Seasons in the NCEP Climate Forecast Version 2. Atmosphere 2016, 7, 28.

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