TREND analysis of changing temperature in Bangladesh due to global warming
Paper Details
TREND analysis of changing temperature in Bangladesh due to global warming
Abstract
Long term changes in near-surface air temperature over Bangladesh was studied using the available historical data of maximum and minimum daily temperature for the last 60 years (1949-2008) collected by the Bangladesh Meteorological Department (BMD). Analysis was done by using MAKESENS trend model. It has been observed that the temperature increased significantly at the rate of 0.00569 oC Yr-1 for AMXT, 0.014498 oC Yr-1 for AMNT and 0.010262 oC Yr-1 for AMT. It is evident that AMXT and AMT raised to maximum levels during November by 0.023 oC Yr-1 and 0.02597 oC Yr-1 respectively. However, AMNT increased to its maximum during February at 0.0308 oC Yr-1. It was also found that maximum increase in AMXT occurred at Shitakundu (0.058102oC Yr-1), in AMNT at Madaripur (0.042 oC Yr-1) and in AMT at Kutubdia (0.031113 oC Yr-1). Southern parts of the country showed higher increasing trends of daily AMXT than other parts. Northern and north-western parts had higher rate of increase in daily AMNT, whereas the daily AMT has increased more in the southern and south-western parts. During Rabi season AMNT increased by 0.023 oC Yr-1 and AMT by 0.013 oC Yr-1. In Kharif-1 AMNT increased by 0.012 oC Yr-1 and AMT by 0.006 oC Yr-1, whereas in Kharif-2 AMXT increased at 0.011oC Yr-1, AMNT at 0.005 oC Yr -1 and AMT at 0.008 oC Yr-1. Besides, the temperature of winter season (December to February) has been raised at much higher rate than summer season (June to August). This study also showed that temperature has been increased to much higher levels over the last 30 years (1979-2008) than the last 60 years (1949-2008).
Chowdhury MHK, Debsharma SK. 1992. Climate change in Bangladesh – A statistical review, Report on IOC-UNEP Workshop on Impacts of Sea Level Rise due to Global Warming, NOAMI, held during 16-19 November 1992, Bangladesh.
Divya, Mehrotra R. 1995. Climate Change and hydrology with emphasis on the Indian subcontinent, Hydrologic Sciences Journal; 40, 231-241.
Gilbert RO. 1987. Statistical methods for environmental pollution monitoring. Van Nostrand Reinhold , New York.
IPCC. 2007. Climate Change 2007: Impacts, adaptation and vulnerability”. Fourth Assessment Report, Working Group II. Cambridge University Press, UK.
Karmakar S, Shrestha ML. 2000. Recent climate change in Bangladesh”, SMRC No.4, SMRC, Dhaka.
Mia NM. 2003. Variations of temperature of Bangladesh”, In Proceedings of SAARC Seminars on Climate Variability In the South Asian Region and its Impacts, SMRC, Dhaka.
Mondal MS, Mollah M, Hossain A. 2008. Characterizing Long-term Changes of Bangladesh Climate in Context of Agriculture and Irrigation” Climate Change Cell, DoE, MoEF; Component 4b, CDMP, MoFDM. Month 2009, Dhaka.
Parthasarathy B, Sontake NA, Monot AA, Kothawale DR. 1987. Drought-flood in the summer monsoon season over different meteorological subdivisions of India for the period 1871-1984”, Journal of Climatology 7, 57-70.
Salmi T, Maatta A, Anttila P, Ruoho-Airola T, Amnell T. 2002. Detecting trends of annual values of atmospheric pollutants by the Mann-Kendall test and Sen’s slope estimates – the Excel template application MAKESENS’’, Published by Finnish Meteorological Institute, Publications on Air Quality No. 31, Report code FMI-AQ-31 (August 2002), ISBN 951-697-563-1, ISSN 1456-789X, Painopaikka: Edita Oyj, Helsinki 2002.
R. Zaman, P. K. Malaker, K. F. I. Murad, M. A. Sadat, 2013. TREND analysis of changing temperature in Bangladesh due to global warming. J. Biodiv. Environ. Sci., 3(2), 32-38.
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