Effect of climate change on seasonal monsoon in Asia and its impact on the variability of monsoon rainfall in Southeast Asia

• Published in: Di xue qian yuan. Vol. 6; no. 6; pp. 817 - 823
• Main Authors: Loo, Yen Yi, Billa, Lawal, Singh, Ajit
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2015; School of Bioscience, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Malaysia%School of Geography, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Malaysia
• Subjects: Climate change; Precipitation anomalies; Rainfall variability; Seasonal monsoons; Southeast Asia; Temperature anomalies; 亚洲季风; 全球变暖; 关联效应; 季节性; 季风降水; 年代际变化; 气候变化; 自然现象; Precipitation anomalies; Climate change; Temperature anomalies; Seasonal monsoons; Southeast Asia; Rainfall variability; Rainfal variability
• ISSN: 1674-9871; 2588-9192
• DOI: 10.1016/j.gsf.2014.02.009

Global warming and climate change is one of the most extensively researched and discussed topical issues affecting the environment.Although there are enough historical evidence to support the theory that climate change is a natural phenomenon,many research scientists are widely in agreement that the increase in temperature in the 20 th century is anthropologically related.The associated effects are the variability of rainfall and cyclonic patterns that are being observed globally.In Southeast Asia the link between global warming and the seasonal atmospheric flow during the monsoon seasons shows varying degree of fuzziness.This study investigates the impact of climate change on the seasonality of monsoon Asia and its effect on the variability of monsoon rainfall in Southeast Asia.The comparison of decadal variation of precipitation and temperature anomalies before the 1970 s found general increases which were mostly varying.But beyond the 1970 s,global precipitation anomalous showed increases that almost corresponded with increases in global temperature anomalies for the same period.There are frequent changes and a shift westward of the Indian summer monsoon.Although precipitation is observed to be 70%below normal levels,in some areas the topography affects the intensity of rainfall.These shifting phenomenon of other monsoon season in the region are impacting on the variability of rainfall and the onset of monsoons in Southeast Asia and is predicted to delay for 15 days the onset of the monsoon in the future.The variability of monsoon rainfall in the SEA region is observed to be decadal and the frequency and intensity of intermittent flooding of some areas during the monsoon season have serious consequences on the human,financial,infrastructure and food security of the region.