Trend analysis of January temperature in Pakistan over the period of 1961-2006: Geographical perspective. | [Pakistan Journal of Meterology • 2010]

Author(s):

1. Iftikhar Ahmed: Key laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, China

2. Sun Zhaobo: Key laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, China

3. Deng Weitao: Key laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, China

4. Romana Ambreen: Key laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, China

Abstract:

Based on monthly data from 54 ground stations over the period of 1961 to 2006, the trend of January temperature has been analyzed in Pakistan and its different regions by statistical method. Tools of FORTRAN and GrADS have been used for computation and mapping. Like other subtropical regions of Asia, also January represents core month of the winter season in Pakistan. Based on analysis, the January temperature has been increased by about 0.6oC at national level in the study period. However, this change in temperature varies from region to region and decade to decade in Pakistan. In order to know the regional detail of temperature tendency, schematically Pakistan is divided into five regions. The northern parts, southwestern parts comprised of Balochistan Plateau, the upper and lower Indus plains have the warming trend but surprisingly northwestern hilly areas of the study domain have cooling trend in January. Furthermore, the northern and western rugged territories of the country show larger interannual temperature variability in January than plains of the country. A cool phase in 1970s, warm phases in 1980s, 1990s and onward is obvious. The study put emphasis on the decadal and regional spatial distribution of temperature anomalies in the month of January.

Page(s): 11-22

DOI: DOI not available

Published: Journal: Pakistan Journal of Meterology, Volume: 7, Issue: 13, Year: 2010

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