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Ab Latif Ibrahim
Geoscience and Digital Earth Center, Research Institute for Sustainable Environment; Universiti Teknologi Malaysia; Johor Bahru Malaysia

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Journal article
Published: 01 June 2017 in Atmospheric Research
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ACS Style

Mou Leong Tan; Ab Latif Ibrahim; Zulkifli Yusop; Vivien P. Chua; Ngai Weng Chan. Climate change impacts under CMIP5 RCP scenarios on water resources of the Kelantan River Basin, Malaysia. Atmospheric Research 2017, 189, 1 -10.

AMA Style

Mou Leong Tan, Ab Latif Ibrahim, Zulkifli Yusop, Vivien P. Chua, Ngai Weng Chan. Climate change impacts under CMIP5 RCP scenarios on water resources of the Kelantan River Basin, Malaysia. Atmospheric Research. 2017; 189 ():1-10.

Chicago/Turabian Style

Mou Leong Tan; Ab Latif Ibrahim; Zulkifli Yusop; Vivien P. Chua; Ngai Weng Chan. 2017. "Climate change impacts under CMIP5 RCP scenarios on water resources of the Kelantan River Basin, Malaysia." Atmospheric Research 189, no. : 1-10.

Article
Published: 15 December 2016 in International Journal of Climatology
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Regional spatio-temporal assessment of extreme precipitation is essential to develop better climate adaptation and mitigation strategies. This study evaluated trends in precipitation extremes from 1985 to 2014 in the Kelantan River Basin (KRB), Malaysia. Forty-one climate stations that had <10% missing data, and which passed the data quality control and homogeneity tests were selected. Trends of 14 precipitation extreme indices recommended by the Expert Team on Climate Change Detection and Indices that related to duration, threshold, absolute, relative and percentile indices were analysed using the Mann–Kendall and Sen's tests. Generally, most of the regional precipitation extremes' indices had increased trends, except the consecutive dry days and consecutive wet days, which are quite consistent with global scale trends studies. On a monthly scale, the maximum 5-day precipitation amount (Rx5d) had increasing trends in January (34.91 mm decade−1) and December (13.96 mm decade−1), by field significance at 95% confidence level. For spatial context, most of the stations with significant trends were distributed in the south-western (mountainous) and northern (near-coastal) regions. In the Tropics, the KRB's extremes indices trends had a similar pattern to the West Pacific, Indian Ocean and Caribbean regions, but were different from Western Thailand, the South China Sea and the North Inter-tropical Convergence Zone, showing that trends of precipitation extreme events are different regionally. Overall, the Pacific Decadal Oscillation, Multivariate El-Niño Southern Oscillation Index, Indian Ocean Dipole and Madden-Julian Oscillation had a significant relationship with all precipitation extremes' indices, and they are contributors to climate changes in this basin.

ACS Style

Mou Leong Tan; Ab Latif Ibrahim; Arthur P. Cracknell; Zulkifli Yusop. Changes in precipitation extremes over the Kelantan River Basin, Malaysia. International Journal of Climatology 2016, 37, 3780 -3797.

AMA Style

Mou Leong Tan, Ab Latif Ibrahim, Arthur P. Cracknell, Zulkifli Yusop. Changes in precipitation extremes over the Kelantan River Basin, Malaysia. International Journal of Climatology. 2016; 37 (10):3780-3797.

Chicago/Turabian Style

Mou Leong Tan; Ab Latif Ibrahim; Arthur P. Cracknell; Zulkifli Yusop. 2016. "Changes in precipitation extremes over the Kelantan River Basin, Malaysia." International Journal of Climatology 37, no. 10: 3780-3797.

Journal article
Published: 01 September 2015 in Applied Geography
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Mou Leong Tan; Darren Ficklin; Barnali Dixon; Ab Latif Ibrahim; Zulkifli Yusop; Vincent Chaplot. Impacts of DEM resolution, source, and resampling technique on SWAT-simulated streamflow. Applied Geography 2015, 63, 357 -368.

AMA Style

Mou Leong Tan, Darren Ficklin, Barnali Dixon, Ab Latif Ibrahim, Zulkifli Yusop, Vincent Chaplot. Impacts of DEM resolution, source, and resampling technique on SWAT-simulated streamflow. Applied Geography. 2015; 63 ():357-368.

Chicago/Turabian Style

Mou Leong Tan; Darren Ficklin; Barnali Dixon; Ab Latif Ibrahim; Zulkifli Yusop; Vincent Chaplot. 2015. "Impacts of DEM resolution, source, and resampling technique on SWAT-simulated streamflow." Applied Geography 63, no. : 357-368.

Journal article
Published: 08 April 2015 in Hydrological Sciences Journal
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This study aims to investigate separate and combined impacts of land-use and climate changes on hydrological components in the Johor River Basin (JRB), Malaysia. The Mann-Kendall and Sen’s slope test were applied to detect the trends in precipitation, temperature and streamflow of JRB. The Soil and Water Assessment Tool (SWAT) was calibrated and validated using measured monthly streamflow data. Validation results supported that SWAT was reliable in the tropical JRB. The trend analysis showed that there was an insignificant increasing trend for streamflow, whereas significant increasing trends for precipitation and temperature were found. The combined (land-use + climate change) impact caused the annual streamflow and evaporation to increase by 4.4% and 1.2%, respectively. Climate (land-use) raised annual streamflow by 4.4% (0.06%) and evaporation by 2.2% (−0.2%). Climate change imposed a stronger impact than land-use change on the streamflow and evaporation. These findings are useful for decision makers to develop better water and land-use policies.

ACS Style

Mou Leong Tan; Ab Latif Ibrahim; Zulkifli Yusop; Zheng Duan; Lloyd Ling. Impacts of land-use and climate variability on hydrological components in the Johor River basin, Malaysia. Hydrological Sciences Journal 2015, 1 -17.

AMA Style

Mou Leong Tan, Ab Latif Ibrahim, Zulkifli Yusop, Zheng Duan, Lloyd Ling. Impacts of land-use and climate variability on hydrological components in the Johor River basin, Malaysia. Hydrological Sciences Journal. 2015; ():1-17.

Chicago/Turabian Style

Mou Leong Tan; Ab Latif Ibrahim; Zulkifli Yusop; Zheng Duan; Lloyd Ling. 2015. "Impacts of land-use and climate variability on hydrological components in the Johor River basin, Malaysia." Hydrological Sciences Journal , no. : 1-17.

Journal article
Published: 29 January 2015 in Remote Sensing
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Satellite precipitation products (SPPs) potentially constitute an alternative to sparse rain gauge networks for assessing the spatial distribution of precipitation. However, applications of these products are still limited due to the lack of robust quality assessment. This study compares daily, monthly, seasonal, and annual rainfall amount at 342 rain gauges over Malaysia to estimations using five SPPs (3B42RT, 3B42V7, GPCP-1DD, PERSIANN-CDR, and CMORPH) and a ground-based precipitation product (APHRODITE). The performance of the precipitation products was evaluated from 2003 to 2007 using continuous (RMSE, R2, ME, MAE, and RB) and categorical (ACC, POD, FAR, CSI, and HSS) statistical approaches. Overall, 3B42V7 and APHRODITE performed the best, while the worst performance was shown by GPCP-1DD. 3B42RT, 3B42V7, and PERSIANN-CDR slightly overestimated observed precipitation by 2%, 4.7%, and 2.1%, respectively. By contrast, APHRODITE and CMORPH significantly underestimated precipitations by 19.7% and 13.2%, respectively, whereas GPCP-1DD only slightly underestimated by 2.8%. All six precipitation products performed better in the northeast monsoon than in the southwest monsoon. The better performances occurred in eastern and southern Peninsular Malaysia and in the north of East Malaysia, which receives higher rainfall during the northeast monsoon, whereas poor performances occurred in the western and dryer Peninsular Malaysia. All precipitation products underestimated the no/tiny (<1 mm/day) and extreme (≥20 mm/day) rainfall events, while they overestimated low (1–20 mm/day) rainfall events. 3B42RT and 3B42V7 showed the best ability to detect precipitation amounts with the highest HSS value (0.36). Precipitations during flood events such as those which occurred in late 2006 and early 2007 were estimated the best by 3B42RT and 3B42V7, as shown by an R2 value ranging from 0.49 to 0.88 and 0.52 to 0.86, respectively. These results on SPPs’ uncertainties and their potential controls might allow sensor and algorithm developers to deliver better products for improved rainfall estimation and thus improved water management.

ACS Style

Mou Leong Tan; Ab Latif Ibrahim; Zheng Duan; Arthur P Cracknell; Vincent Chaplot. Evaluation of Six High-Resolution Satellite and Ground-Based Precipitation Products over Malaysia. Remote Sensing 2015, 7, 1504 -1528.

AMA Style

Mou Leong Tan, Ab Latif Ibrahim, Zheng Duan, Arthur P Cracknell, Vincent Chaplot. Evaluation of Six High-Resolution Satellite and Ground-Based Precipitation Products over Malaysia. Remote Sensing. 2015; 7 (2):1504-1528.

Chicago/Turabian Style

Mou Leong Tan; Ab Latif Ibrahim; Zheng Duan; Arthur P Cracknell; Vincent Chaplot. 2015. "Evaluation of Six High-Resolution Satellite and Ground-Based Precipitation Products over Malaysia." Remote Sensing 7, no. 2: 1504-1528.

Journal article
Published: 16 July 2014 in Journal of Water and Climate Change
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The impact of climate change and uncertainty of climate projections from general circulation models (GCMs) from phase 5 of the Coupled Model Intercomparison Project (CMIP5) on streamflow in the Johor River Basin, Malaysia was assessed. Eighteen GCMs were evaluated, and the six that adequately simulated historical climate were selected for an ensemble of GCMs under three Representative Concentration Pathways (RCPs; 2.6 (low emissions), 4.5 (moderate emissions) and 8.5 (high emissions)) for three future time periods (2020s, 2050s and 2080s) as inputs into the Soil and Water Assessment Tool (SWAT) hydrological model. We also quantified the uncertainties associated with GCM structure, greenhouse gas concentration pathways (RCP 2.6, 4.5 and 8.5), and prescribed increases of global temperature (1–6 °C) through streamflow changes. The SWAT model simulated historical monthly streamflow well, with a Nash–Sutcliffe efficiency coefficient of 0.66 for calibration and 0.62 for validation. Under RCPs 2.6, 4.5, and 8.5, the results indicate that annual precipitation changes of 1.01 to 8.88% and annual temperature of 0.60–3.21 °C will lead to a projected annual streamflow ranging from 0.91 to 12.95% compared to the historical period. The study indicates multiple climate change scenarios are important for a robust hydrological impact assessment.

ACS Style

Mou Leong Tan; Darren Ficklin; Ab Latif Ibrahim; Zulkifli Yusop. Impacts and uncertainties of climate change on streamflow of the Johor River Basin, Malaysia using a CMIP5 General Circulation Model ensemble. Journal of Water and Climate Change 2014, 5, 676 -695.

AMA Style

Mou Leong Tan, Darren Ficklin, Ab Latif Ibrahim, Zulkifli Yusop. Impacts and uncertainties of climate change on streamflow of the Johor River Basin, Malaysia using a CMIP5 General Circulation Model ensemble. Journal of Water and Climate Change. 2014; 5 (4):676-695.

Chicago/Turabian Style

Mou Leong Tan; Darren Ficklin; Ab Latif Ibrahim; Zulkifli Yusop. 2014. "Impacts and uncertainties of climate change on streamflow of the Johor River Basin, Malaysia using a CMIP5 General Circulation Model ensemble." Journal of Water and Climate Change 5, no. 4: 676-695.