Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood

In December 2021, Super Typhoon Rai caused significant devastation to the South Philippines and East Malaysia. In the meantime, an unprecedented flood event occurred in Peninsular Malaysia at 2,000 km west of the typhoon's path, causing comparable socioeconomic impacts as Rai. Record-breaking 3...

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Main Authors: Dong, Luojie, Wang, Jingyu, Zhi, Xiefei, Park, Edward, Wang, Xianfeng, Yim, Steve Hung Lam, Zhang, Hugh, Lee, Joshua, Tran, Dung Duc
Other Authors: Asian School of the Environment
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/173696
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1736962024-02-26T15:30:42Z Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood Dong, Luojie Wang, Jingyu Zhi, Xiefei Park, Edward Wang, Xianfeng Yim, Steve Hung Lam Zhang, Hugh Lee, Joshua Tran, Dung Duc Asian School of the Environment School of Computer Science and Engineering Lee Kong Chian School of Medicine (LKCMedicine) Earth Observatory of Singapore Earth and Environmental Sciences Atmospheric river Extreme precipitation In December 2021, Super Typhoon Rai caused significant devastation to the South Philippines and East Malaysia. In the meantime, an unprecedented flood event occurred in Peninsular Malaysia at 2,000 km west of the typhoon's path, causing comparable socioeconomic impacts as Rai. Record-breaking 3-day precipitation was received by Peninsular Malaysia during 16–18 December. Based on the storm tracking results, this study identified two mesoscale convective systems (MCSs) that were directly responsible for the flooding. The two MCSs were directly initiated by a tropical depression and sustained by an elongated easterly water vapor corridor originating from the Super Typhoon Rai. The return period and joint frequency analysis of key drivers indicate that the 3-day downpour was more severe than a “once-in-a-century” event. Historical records suggest such anomalous moisture channel has become more frequent in Southeast Asia, which alarms heightened attention in forecasting winter flood. Ministry of Education (MOE) Published version This research is supported by the National Institute of Education, Singapore, under its Academic Research Fund (RI 5/22 WJY), Academic Research Fund Tier 2 (MOE-T2EP402A20-0001 to E. P.) and (MOE-MOET2EP10121-0008 to X. W.). 2024-02-23T01:05:21Z 2024-02-23T01:05:21Z 2023 Journal Article Dong, L., Wang, J., Zhi, X., Park, E., Wang, X., Yim, S. H. L., Zhang, H., Lee, J. & Tran, D. D. (2023). Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood. Geophysical Research Letters, 50(23), e2023GL106112-. https://dx.doi.org/10.1029/2023GL106112 0094-8276 https://hdl.handle.net/10356/173696 10.1029/2023GL106112 2-s2.0-85178435141 23 50 e2023GL106112 en RI 5/22 WJY MOE-T2EP402A20-0001 MOE-MOET2EP10121-0008 Geophysical Research Letters © 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Earth and Environmental Sciences
Atmospheric river
Extreme precipitation
spellingShingle Earth and Environmental Sciences
Atmospheric river
Extreme precipitation
Dong, Luojie
Wang, Jingyu
Zhi, Xiefei
Park, Edward
Wang, Xianfeng
Yim, Steve Hung Lam
Zhang, Hugh
Lee, Joshua
Tran, Dung Duc
Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
description In December 2021, Super Typhoon Rai caused significant devastation to the South Philippines and East Malaysia. In the meantime, an unprecedented flood event occurred in Peninsular Malaysia at 2,000 km west of the typhoon's path, causing comparable socioeconomic impacts as Rai. Record-breaking 3-day precipitation was received by Peninsular Malaysia during 16–18 December. Based on the storm tracking results, this study identified two mesoscale convective systems (MCSs) that were directly responsible for the flooding. The two MCSs were directly initiated by a tropical depression and sustained by an elongated easterly water vapor corridor originating from the Super Typhoon Rai. The return period and joint frequency analysis of key drivers indicate that the 3-day downpour was more severe than a “once-in-a-century” event. Historical records suggest such anomalous moisture channel has become more frequent in Southeast Asia, which alarms heightened attention in forecasting winter flood.
author2 Asian School of the Environment
author_facet Asian School of the Environment
Dong, Luojie
Wang, Jingyu
Zhi, Xiefei
Park, Edward
Wang, Xianfeng
Yim, Steve Hung Lam
Zhang, Hugh
Lee, Joshua
Tran, Dung Duc
format Article
author Dong, Luojie
Wang, Jingyu
Zhi, Xiefei
Park, Edward
Wang, Xianfeng
Yim, Steve Hung Lam
Zhang, Hugh
Lee, Joshua
Tran, Dung Duc
author_sort Dong, Luojie
title Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
title_short Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
title_full Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
title_fullStr Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
title_full_unstemmed Revealing the key drivers conducive to the “once-in-a-century” 2021 Peninsular Malaysia flood
title_sort revealing the key drivers conducive to the “once-in-a-century” 2021 peninsular malaysia flood
publishDate 2024
url https://hdl.handle.net/10356/173696
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