Global Radiation, Transmissivity and Bright Sunshine Hour Trend over Nagpur in Pre-Monsoon and Monsoon Seasons

• 作者: Bimal K. Bhattacharya Jyotsna Singh Manoj Kumar
• 来源期刊: 大气和气候科学(英文)
• 学科: 地球科学
• 关键词: GLOBAL Radiation BRIGHT SUNSHINE HOUR TRANSMISSIVITY GLOBAL Dimming Mann Kendall Test
• 年，卷（期）: 2012,（2）
• 页码范围: 206-209
• 页数: 4页
• 分类号: P4

摘要

Global dimming term was introduced in 1990s which means the decline in global radiation. This decline was reported in several studies across the world. In the present study time series analysis of global radiation (1960-2003), transmissivity (1960-2003) and bright sunshine hours (1973-2003) has been done over Nagpur during pre-monsoon (March to May) and monsoon seasons (June-September). A significant decrease in global radiation and transmissivity has been reported for both the seasons and it was higher during pre-monsoon compared to monsoon. Bright sunshine hour has also shown good agreement with the previous trend with a significant trend on pre-monsoon months only. Mann Kendall test was performed to confirm the significance of reported trend.