NDLI: The performance of different cumulus parameterization schemes in simulating the 2006/2007 southern peninsular Malaysia heavy rainfall episodes

Content Provider	Springer Nature Link
Author	ARDIE, WAN AHMAD SOW, KHAI SHEN TANGANG, FREDOLIN T HUSSIN, ABDUL GHAPOR MAHMUD, MASTURA JUNENG, LIEW
Copyright Year	2012
Abstract	The performance of four different cumulus parameterization schemes (CPS) in the Weather Research and Forecasting (WRF) model for simulating three heavy rainfall episodes over the southern peninsular Malaysia during the winter monsoon of 2006/2007 were examined. The modelled rainfall was compared with the 3-hourly satellite observation and objectively scored using a verification technique called the acuity–fidelity. The technique is based on minimization of a cost function that is calculated from four parameters taking into account errors in distance, time, intensity, and missed events. All simulations were made for 72 hours for the three episodes starting at 1200 UTC 17 December 2006, 1200 UTC 24 December 2006 and 1200 UTC 11 January 2007, respectively. The four different CPSs used are the new Kain–Fritsch scheme (KF2), the Betts–Miller–Janjic scheme (BMJ), the Grell–Devenyi ensemble scheme (GD) and the older Kain–Fritsch scheme (KF1). While the BMJ scheme shows some success in the second and third episodes, it shows high location errors in the first episode, leading to high acuity errors. The GD, KF2 and KF1 schemes performed poorly, although both the BMJ and GD schemes simulated the observed drastic increase of rainfall at 2100 UTC 18 December 2006 during the first episode. Overall, the KF1 and KF2 schemes produced positive biases in terms of coverage, while the GD scheme showed persistent location bias, producing a scattered line of precipitation over the eastern coastline of peninsular Malaysia. Although the BMJ scheme has better results, its poor performance for the first episode suggests that suitability of CPS may be case dependent.
Starting Page	317
Ending Page	327
Page Count	11
File Format	PDF
ISSN	02534126
Journal	Journal of Earth System Science
Volume Number	121
Issue Number	2
e-ISSN	0973774X
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-05-09
Publisher Institution	Indian Academy of Sciences
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Modelling acuity–fidelity cumulus parameterization scheme southern peninsular Malaysia rainfall Extraterrestrial Physics, Space Sciences Earth Sciences
Content Type	Text
Resource Type	Article
Subject	1900/1901

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