CAJ | 학술논문

根据国家气象信息中心给出的逐日日照时数资料,利用经验正交函数分解(EOF)和Mann-Kendall方法分析了1956~2005年中国地区日照时数的变化趋势、突变情况、时空分布和季节变化特征.研究表明:中国绝大部分地区近50年来日照时数总量呈减少的趋势,在1980年前后大部分观测站显示有突变,20世纪90年代之后减少趋势有所缓解,保持在稳定偏低的状态;此类变化趋势在东南地区较西北地区更为显著.且日照时数的上述变化主要由于夏季日照的变化造成的.
근거국가기상신식중심급출적축일일조시수자료,이용경험정교함수분해(EOF)화Mann-Kendall방법분석료1956~2005년중국지구일조시수적변화추세、돌변정황、시공분포화계절변화특정.연구표명:중국절대부분지구근50년래일조시수총량정감소적추세,재1980년전후대부분관측참현시유돌변,20세기90년대지후감소추세유소완해,보지재은정편저적상태;차류변화추세재동남지구교서북지구경위현저.차일조시수적상술변화주요유우하계일조적변화조성적.
@@@@The sunshine duration daily data for 1956–2005, which was made available by the National Meteorological Information Center, is used to calculate sunshine duration trends, abrupt changes, temporal and spatial distribution, and seasonal variation through empirical orthogonal function (EOF) and Mann-Kendall analyses. The results show that:(1) Significant decreases in sunshine duration occurred over much of China during the latter half of the 20th century. The decreasing trend halted until the 1990s, after which time it was maintained at a low state. (2) Most of the meteorological stations happened abrupt climate change in 1980. (3) This change was significant, particularly in the eastern half of the country. (4) The change in summer sunshine duration is a major contributor to this decrease.