Sunshine Duration in China: Variation Characteristics and Its Influence

doi:10.11924/j.issn.1000-6850.casb19030090

Abstract

Abstract:

The paper aims to study the spatio-temporal variation characteristics of sunshine duration in China under the background of climate change. Based on the observation data from 2089 national meteorological stations during 1961-2017, we analyzed the spatio-temporal variation characteristics of sunshine duration in different regions of China and the influencing factors by using the methods of the linear trend, partial correlation, and Mann-Kendall mutation. The results showed that the spatial distribution of sunshine duration was high in northern China and low in southern China, and had a significantly decreasing trend with a rate of -45.8 h/10 a. The sunshine duration had a mutation in 1989 in southwestern China, in 1983 in northwestern China, and in 1985 in northeastern China, and no mutation occurred in other regions. Summer had the highest sunshine duration, followed by spring, autumn and winter; and the decline rate was also the highest in summer, followed by autumn, winter and spring. Sunshine duration had a highly negative correlation with total cloud amount, visibility, haze, precipitation, while had a positive correlation with wind speed, and no significant correlation with fog.

Key words: sunshine duration, spatio-temporal distribution, trend, agriculture, influence

CLC Number:

S162

Xiao Fengjin, Zhang Xuguang, Liao Yaoming, Liu Qiufeng. Sunshine Duration in China: Variation Characteristics and Its Influence[J]. Chinese Agricultural Science Bulletin, 2020, 36(20): 92-100.

Figures/Tables 8

References 39

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地区	1960s	1970s	1980s	1990s	2000s	2010s	1961—2017	变化趋势/(h/10 a)
西北地区	2818	2812	2738	2753	2755	2692	2765	-20.9
华北地区	2820	2766	2694	2625	2540	2494	2665	-68.4
东北地区	1985	1991	1918	1885	1897	1877	1928	-25.1
华东地区	2202	2107	2000	1921	1917	1834	2005	-73.1
华中地区	1926	1900	1769	1754	1690	1607	1783	-63.1
华南地区	1842	1779	1705	1637	1698	1603	1716	-43.5
西南地区	1692	1728	1656	1622	1641	1624	1662	-19.1
全国	2221	2203	2116	2080	2060	1992	2118	-45.8

地区	1960s	1970s	1980s	1990s	2000s	2010s	1961—2017	变化趋势/(h/10 a)
西北地区	2818	2812	2738	2753	2755	2692	2765	-20.9
华北地区	2820	2766	2694	2625	2540	2494	2665	-68.4
东北地区	1985	1991	1918	1885	1897	1877	1928	-25.1
华东地区	2202	2107	2000	1921	1917	1834	2005	-73.1
华中地区	1926	1900	1769	1754	1690	1607	1783	-63.1
华南地区	1842	1779	1705	1637	1698	1603	1716	-43.5
西南地区	1692	1728	1656	1622	1641	1624	1662	-19.1
全国	2221	2203	2116	2080	2060	1992	2118	-45.8

季节	日照时数/h							变化趋势/(h/10 a)
季节	1960s	1970s	1980s	1990s	2000s	2010s	1961—2017	变化趋势/(h/10 a)
春季	571.1	565.1	556.4	539.1	568.1	550.8	558.5	-3.2
夏季	669.6	655.6	621.1	600.2	587.4	582.5	619.8	-19.6
秋季	526.3	532.6	509.6	516.3	497.7	459.0	508.3	-11.7
冬季	463.4	444.1	432.0	428.7	411.0	404.3	431.0	-11.6

季节	日照时数/h							变化趋势/(h/10 a)
季节	1960s	1970s	1980s	1990s	2000s	2010s	1961—2017	变化趋势/(h/10 a)
春季	571.1	565.1	556.4	539.1	568.1	550.8	558.5	-3.2
夏季	669.6	655.6	621.1	600.2	587.4	582.5	619.8	-19.6
秋季	526.3	532.6	509.6	516.3	497.7	459.0	508.3	-11.7
冬季	463.4	444.1	432.0	428.7	411.0	404.3	431.0	-11.6

要素	日照时数	总云量	能见度	雾日数	霾日数	风速	降水量
日照时数	1	-0.553^**	-0.402^**	-0.088	-0.586^**	0.569^**	-0.355^**
总云量	-0.553^**	1	0.358^**	0.221	0.632^**	-0.197	0.200
能见度	-0.402^**	0.358^**	1	0.166	0.762^**	-0.341^**	0.073
雾日数	-0.088	0.221	0.166	1	0.284^*	0.164	0.150
霾日数	-0.586^**	0.632^**	0.762^**	0.284^*	1	-0.513^**	0.128
风速	0.569^**	-0.197	-0.341^*	0.164	-0.513^**	1	0.061
降水量	-0.355^**	0.200	0.073	0.150	0.128	0.061	1