潍坊市近56年日照时数变化特征分析  

Analysis of Characteristics of Sunshine Duration Change in Weifang City in Recent 56 Years

作　　者：张娜[1] 崔日鲜[1] 

机构地区：[1]青岛农业大学农学与植物保护学院,山东青岛266109

出　　处：《青岛农业大学学报（自然科学版）》2012年第4期273-277,共5页Journal of Qingdao Agricultural University(Natural Science)

摘　　要：本文利用Mann-Kendall、Pettitt检验、线性趋势和回归分析等方法对潍坊市1956—2010年间年日照时数的变化进行了分析。潍坊市年日照时数有明显减少趋势,减少速率为97.04h/10a。潍坊市年日照时数减少突变发生在1983年。潍坊市四季日照时数均呈明显减少趋势,其中夏季日照时数减少速率最大,春季减少速率最小。潍坊市春季、夏季、秋季和冬季日照时数减少速率分别为14.83h/10a、35.59h/10a、24.76h/10a和21.85h/10a。潍坊市年日照时数与相对湿度和实际水汽压呈显著负相关,与风速呈显著正相关,与降水量相关性不明显。In present study, the variability of the annual and seasonal sunshine duration in Weifang city during 1955-2010 is examined using the Mann-Kendall test, Pettitt test, linear trend and linear regression methods. The results show that the annual sunshine duration in Weifang city exhibited decreasing trend during 1955 -2010 and the decreasing rate is 97.04h/decade. A significant downward shift is detected around 1983 through the Pettitt test. On the seasonal scale, the significant decreasing trends are identified in all four seasons. Decline in sunshine dura- tion is highest in summer and lowest in spring. The decreasing rate in sunshine duration in spring, summer, autumn and winter are 14.83h/10a, 35.59h/10a, 24.76h/10a and 21.85h/10a, respectively. Annual sunshine duration has significantly negative correlations with relative humidity and surface vapor pressure; with wind speed have significantly positive correlation. However, annual sunshine duration have non-significant correlation with annual precipitation.

关 键 词：潍坊市 日照时数 变化趋势 突变 

分 类 号：P422.11[天文地球—大气科学及气象学]