厦门市日照气候变化特征及成因分析

利用厦门市两个气象观测台站的日照现测资料，对厦门市目照时数的年、季、月变化特征进行全面分析。结果表明，近55年来厦门市年、季、月日照时数均呈减少的变化趋势，主城区比郊区明显；春夏季比秋冬减少明显，其中夏季为四季中日照时数减少最明显的季节，冬季日照时数减少最慢；从各月来看，主城区8月、郊区7月日照时数减少最快；日照时数在20世纪80年代初发生明显的突变现象。另外，对影响日照时数的云量、雾日、轻雾日、霾日等气象因子的变化特征进行分析，找出与厦门市日照时数变化相关的主要影响因子。结果表明，低云云量的增加以及雾、轻雾、霾等影响日照时数的天气现象日数的增多，是造成厦门市主城区日照时数减少的主要原因。而郊区日照时数减少的主要原因是轻雾和霾天气日数的增多。

Analysis on Climate Change Characteristics of Sunshine Duration and Its Cause in Xiamen City

Based on the sunshine duration data of two meteorological stations,the annual,seasonal and monthly change characteristics of sunshine duration were comprehensively analyzed in Xiamen City.It demonstrated that the annual,seasonal and monthly sunshine times showed a decreased tendency in recent 55 years,and that in the urban area was more obvious than suburbs.That in the spring and summer decreased more obvious than autumn and winter.That in the summer decreased most obvious and winter inversely.That in the a...