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Extreme Precipitation Trends Over the Middle of Indochina Peninsula During the Period from 1978-2007
The present study focuses on extreme precipitation trends over the middle of Indochina Peninsula for 30 years from 1978-2007. We use daily gridded precipitation data obtained at 0.5° horizontal grid resolution from APHRODITE (Asian Precipitation-Highly Resolved Observational Data Integration Towards Evaluation of Water Resources) to detect the trends with the use of the Man-Kendall and Theil-Sen approach. Extreme precipitation indices were selected from the WMO–CCL/CLIVAR list with a set of twelve indices of precipitation extremes by focusing on precipitation intensity and frequency. It was found that eight out of twelve indices were shown to be statistically increasing trends. The rate of change in the significant trend is greater than 20% for both the increasing and decreasing trends. In addition, spatial distributions of the significant extreme indices over the basins are also discussed in terms of extremely increasing and decreasing trends. The Wang and Northern Mekong, Mae Klong and Phetchaburi indicate increasing the trend of indices while the decreasing trends of indices were found over the Chi and Mun basins.
Keywords
Precipitation Trend, Extreme Precipitation, Indochina Peninsula, River Basins.
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