1980-2014年沈阳地区日照时数变化特征及影响因素

doi:10.11927/j.issn.1673-503X.2016.02.012

Abstract

Abstract: Based on monthly sunshine duration, annual low cloud amount, annual total cloud amount, annual precipitation and number of annual precipitation days at 7 weather stations in Shenyang from 1980 to 2014, climate characteristics of annual and seasonal sunshine duration were analyzed by a climatic trend method.The correlation relationships were discussed between sunshine duration and its influencing elements.The results indicate that the annual and seasonal sunshine duration in Shenyang are in decreasing trends from 1980 to 2014.Annual mean sunshine duration in Shenyang reduces at the rate of 74.5 h per decade, and it is less than average in the recent 35 years after 2002.There is a significantly decreasing tendency in seasonal sunshine duration at the rates of 11.8-27.1 h per decade, and the order of decreasing amplitudes ranks from high to low as summer, autumn, spring and winter.Spatial distribution of annual sunshine duration in Shenyang decreases from the north to south.Sunshine duration in each weather station is in a decreasing trend.Annual sunshine duration is in a significant negative correlation with precipitation, total cloud amount, low cloud amount and number of precipitation days, especially with the latter three elements.

Key words: Sunshine duration, Climate trend rate, Correlation analysis

CLC Number:

P422.1⁺1

MU Chen-ying, XU Quan-hui, ZHANG Jing, LI Shi, SONG Xiao-wei, ZHAO Feng, ZHANG Yu, QIU Mei-juan. Characteristics of sunshine duration and its influencing factors in Shenyang from 1980 to 2014[J]. Journal of Meteorology and Environment, 2016, 32(2): 89-94.

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http://www.jme1984.net.cn/EN/Y2016/V32/I2/89

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Characteristics of sunshine duration and its influencing factors in Shenyang from 1980 to 2014

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