A study on summer monsoon season and rainfall characteristics in summer monsoon season over Southern Vietnam in 1981-2014 period

Huong Ngo-Thi-Thanh; Hang Vu-Thanh

doi:10.15625/1859-3097/17/4B/12963

Author affiliations

Authors

Huong Ngo-Thi-Thanh Faculty of Hydro-Meteorology and Oceanography, Hanoi University of Science, VNU
Hang Vu-Thanh Faculty of Hydro-Meteorology and Oceanography, Hanoi University of Science, VNU

DOI:

https://doi.org/10.15625/1859-3097/17/4B/12963

Keywords:

Summer monsoon, rainfall indices, Southern Vietnam.

Abstract

This study determines the summer monsoon season over Southern Vietnam in 1981-2014 period by using observed daily rain-gauge data and reanalyzed daily 850 hPa wind data. The results show that the mean onset and retreat dates of summer monsoon over Southern Vietnam occur on May 15 and October 13, with standard deviations of 14.12 and 13.55 days, respectively. The results also show that the onset and retreat dates tend to precede in the recent years. In summer monsoon period, the values of RX1day and RX5day are high in Rach Gia and Ca Mau but low in Can Tho, CDD of all stations are low. In all stations, the values of extreme rainfall indices in 1998-2014 period are higher compared to those in 1981-1997 period.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Zhang, Y., Li, T., Wang, B., and Wu, G., 2002. Onset of the summer monsoon over the Indochina Peninsula: Climatology and interannual variations. Journal of Climate, 15(22), 3206-3221.

Wang, B., 2002. Rainy season of the Asian-Pacific summer monsoon. Journal of Climate, 15(4), 386-398.

Cook, B. I., and Buckley, B. M., 2009. Objective determination of monsoon season onset, withdrawal, and length. Journal of Geophysical Research: Atmospheres, 114(D23).

Kajikawa, Y., and Wang, B., 2012. Interdecadal change of the South China Sea summer monsoon onset. Journal of Climate, 25(9), 3207-3218.

Wang, B., Zhang, Y., and Lu, M. M., 2004. Definition of South China Sea monsoon onset and commencement of the East Asia summer monsoon. Journal of Climate, 17(4), 699-710.

Wei-Dong, Y. U., Kui-Ping, L. I., Jian-Wei, S. H. I., Lin, L. I. U., Hui-Wu, W. A. N. G., and Yan-Liang, L. I. U., 2012. The onset of the monsoon over the Bay of Bengal: The year-to-year variations. Atmospheric and Oceanic Science Letters, 5(4), 342-347.

Thanh, P. X., Fontaine, B., and Philippon, N., 2010. Onset of the summer monsoon over the southern Vietnam and its predictability. Theoretical and Applied Climatology, 99(1-2), 105-113.

Tuan, B. M., Truong, N. M., 2010: The characteristics of large-scale circulation during the monsoon onset period over Southern Vietnam in 1998. Journal of Natural Sciences and Technology, Vietnam National University, Hanoi, 26(3S), 470-478.

Truong, N. M., Tuan, B. M, Thanh, C., Hai, B. H., Van, H. T., 2011. Thermal and moist large-scale processes during the monsoon onset period over Southern Vietnam in 2004. Journal of Natural Sciences and Technology, Vietnam National University, Hanoi, 27(3S), 254-265.

Thuan, N. T. H., Quynh, C. K., 2007. Validating the main feature variations of summer rainfall over the Southern Vietnam in ENSO-years. Proceedings of the 10th Scientific Conference, Institute of Hydro-Meteorology and Environment, pp. 314-322.

Ngo-Thanh, H., Ngo-Duc, T., Nguyen-Hong, H., Baker, P., and Phan-Van, T., 2017. A distinction between summer rainy season and summer monsoon season over the Central Highlands of Vietnam. Theoretical and Applied Climatology, 1-10.

Peterson, T., Folland, C., Gruza, G., Hogg, W., Mokssit, A., and Plummer, N., 2001. Report on the activities of the working group on climate change detection and related rapporteurs. Geneva: World Meteorological Organization, 143 pp.

Sen, P. K., 1968. Estimates of the regression coefficient based on Kendall's tau. Journal of the American Statistical Association, 63(324), 1379-1389.

Kendall, M. G., 1955. Rank correlation methods. Charles Griffin, London, 272 p.