International Journal of Environmental Monitoring and Analysis
Volume 1, Issue 5, October 2013, Pages: 175-181
Received: Jul. 22, 2013;
Published: Sep. 10, 2013
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Mst. Noorunnahar, Research Student, I.S.R.T., University of Dhaka, Dhaka -1000, Bangladesh
Md. Arafat Rahman, Research Student, I.S.R.T., University of Dhaka, Dhaka -1000, Bangladesh
This study aims to determine trends in the long-term monthly total data series using non-parametric methods like Mann-Kendall and Sen's T test. The change per unit time in a time series having a linear trend is estimated by applying a simple non-parametric procedure, namely Sen's estimator of slope. Serial correlation structure in the data is accounted for determining the significance level of the results of the Mann-Kendall test. The data used in this study, consists of seven divisional meteorological stations across Bangladesh. Station basis trend analysis has been performed for temperature data. For temperature data most of the stations show significant trend. There are rising rates of temperature in some months and decreasing trend in some other months obtained by these statistical tests suggesting overall significant changes in the area.
Md. Arafat Rahman,
Estimating Regional Trends of Temperature in Bangladesh, International Journal of Environmental Monitoring and Analysis.
Vol. 1, No. 5,
2013, pp. 175-181.
Ashoke Basistha, DS Arya, and NK Goel, 2009. Analysis of historical changes in rainfall in the indian himalayas. International Journal of Climatology, 29(4), 555-572.
B Bonaccorso, A Cancelliere, G Rossi, 2005. Detecting trends of extreme rainfall series in sicily, 2, 7-11.
Bihrat Onoz and Mehmetcik Bayazit, 2003. The power of statistical tests for trend detection. Turkish Journal of Engineering and Environmental Sciences, 27(4), 247-251.
Donald H Burn, Omar I Abdul Aziz, and Alain Pietroniro, 2004. A comparison of trends in hydrological variables for two watersheds in the mackenzie river basin, Canadian Water Resources Journal, 29(4), 283-298.
Donald H Burn and Mohamed A Hag Elnur, 2002. Detection of hydrologic trends and variability. Journal of hydrology, 255(1), 107-122.
Ercan Kahya and Serdar Kalayc, 2004. Trend analysis of stream ow in turkey. Journal of Hydrology, 289(1), 128-144.
Harry F Lins and James R Slack, 1999. Streamow trends in the united states, Geophysical research letters, 26(2), 227-230.
Mikdat Kadioglu, 1997. Trends in surface air temperature data over turkey. International Journal of Climatology, 17(5),511-520.
M Bani-Domi, 2005. Trend analysis of temperatures and precipitation in jordan. Dept. of Geography Yarmouk University, Irbid-Jordan
Pranab Kumar Sen, 1968. Estimates of the regression coe_cient based on kendall's tau. Journal of the American Statistical Association, 63(324), 1379-1389.
Pranab Kumar Sen, 1968. On a class of aligned rank order tests in two-way layouts, The Annals of Mathematical Statistics, pages 1115-1124.
Qiang Zhang, Chunling Liu, Chong-yu Xu, Youpeng Xu, and Tong Jiang, 2006. Observed trends of annual maximum water level and stream ow during past 130 years in the yangtze river basin, china. Journal of hydrology, 324(1), 255-265.
Robert M Hirsch, James R Slack, and Richard A Smith, 1982. Techniques of trend analysis for monthly water quality data. Water resources research, 18(1),107-121.
Shamsuddin Shahid, 2010. Rainfall variability and the trends of wet and dry periods in Bangladesh. International Journal of Climatology, 30(15), 2299-2313.
Shabtai Cohen and Gerald Stanhill, 1996. Contemporary climate change in the jordan valley. Journal of applied Meteorology, 35(7), 1051-1058.
Sheng Yue, Paul Pilon, Bob Phinney, and George Cavadias, 2002. The inuence of autocorrelation on the ability to detect trend in hydrological series. Hydrological Processes , 16(9),1807-1829.
Turgay Partal and Ercan Kahya, 2006. Trend analysis in turkish precipitation data. Hydrological Processes, 20(9), 2011-2026.
Vijay Kumar, Sharad K Jain, and Yatveer Singh, 2010. Analysis of long-term rainfall trends in india. Hydrological Sciences Journal-Journal des Sciences Hydrologiques, 55(4), 484-496
Von Storch, H., 1995. Misuses of statistical analysis in climate research, in Analysis of Climate Variability: Applications of Statistical Techniques, edited by H. V. Storch and A. Navarra, pp. 11-26, Springer-Verlag, New York.
Yun-Sheng Yu, Shimin Zou, and Donald Whittemore (1993). Non-parametric trend analysis of water quality data of rivers in kansas. Journal of Hydrology, 150(1), 61-80.
Zelalem K Tesemma, Yasir A Mohamed, and Tammo S Steenhuis, 2010. Trends in rainfall and runo_ in the blue nile basin, Hydrological Processes, 24(25), 3747-3758.
Intergovernmental Panel on Climate Change (IPCC), http://www.ipcc.ch/
United States Environmental Protection Agency, http://www.epa.gov/