孟加拉国分区总部日照时数趋势及变率分析

M. Farukh, M. Islam, L. Akter, R. Khatun
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引用次数: 1

摘要

本研究利用孟加拉国8个气象站分区总部(Dhaka、Rangpur、Rajshahi、Mymensingh、Sylhet、Barishal、Khulna和Chattagram)的日照时数资料进行分析,以评估其长期变化和趋势。使用的数据是1980年至2010年的BMD数据。从1980年到2010年,年日照时数减少了一个月(6月- 9月)。日照时数在雨季(6 - 9月)、冬季(12 - 2月)、季风后(10 - 11月)减少最多,季风前(3 - 5月)减少最少。对2000年前后观测资料的分析表明,除Chattagram站外,孟加拉国各分区总部1 - 12月的日照时数均呈减少趋势。环流模式(GCM)确定孟加拉国所有分区总部在(6 - 9月)的最大日照时数为东北和西南减少,东部在(3 - 5月)的最小日照时数为减少。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Trend and Variability Analysis of Sunshine Duration in Divisional Headquarters of Bangladesh
In this study, Sunshine duration data of eight divisional headquarters of Bangladesh Meteorological Stations (Dhaka, Rangpur, Rajshahi, Mymensingh, Sylhet, Barishal, Khulna and Chattagram) were analyzed to evaluate the long-term changes and trends. The data used are the BMD data spanning from 1980 to 2010. The annual sunshine duration has decreased by the month of (June –September) from 1980 to 2010. Seasonal changes in sunshine duration were also analyzed where the maximum decline was found in rainy-monsoon season (June – September), the winter season (December – February), then the post-monsoon season (October – November) and the minimum in the pre-monsoon season (March – May). Analysis of observed data before and after 2000 represents the sunshine durations have decreasing trends in all divisional headquarters of Bangladesh except Chattagram station during the month of (January – December). General Circulation Model (GCM) defined that the maximum sunshine hour was decline north-east and south-west in all divisional headquarters of Bangladesh during the month of (June – September) and the minimum sunshine hour was decline in eastern part of the country during the month of (March – May).
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