Spatiotemporal changes in sunshine duration and cloud amount as well as their relationship in China during 1954-2005
Spatiotemporal changes in sunshine duration and cloud amount as well as their relationship in China during 1954-2005
复制标题
1954-2005年中国日照时数和云量时空变化及其关系
DOI：
10.1029/2009jd012879
复制
发表时间：
2010-04
期刊：
影响因子：
--
通讯作者：
Xia X.
中科院分区：
文献类型：
--
作者：
Xia X.
基于全国618个气象站的地面观测资料，研究了云量和日照时数的长期变化趋势。在年际尺度和年代际尺度上分析了两个测量的一致性，并对日照时数的变化趋势有了进一步的认识。日照时数（SSD）和总云量（TCC）有显著的减少趋势；然而，低层云量（LCC）呈增加趋势，尽管在95%水平上不显著。SSD的年际变化与TCC和LCC的年际变化呈强烈的负相关，表明SSD的短期变化主要由云量决定。SSD和TCC的年代际变化呈正相关，表明TCC的长期变化不能解释SSD的下降趋势。LCC的长期变化似乎是中国南方SSD趋势的重要贡献者之一，在那里，SSD的长期变化与LCC的长期变化呈负相关。SSD减少的原因是晴空（13%）、多云（51%）和阴天（36%）的平均SSD减少，其中30%的减少被晴空频率的增加所抵消。
Long‐term trends in cloud amount and sunshine duration have been studied based upon surface observations at 618 meteorological stations across China. The degree of agreement between the two measures at interannual and decadal scales is analyzed, and a further understanding of the trends in sunshine duration is presented. A significant decreasing trend has been derived for sunshine duration (SSD) and total cloud cover (TCC); however, low‐level cloud cover (LCC) shows an increasing trend, although it is not significant at the 95% level. Interannual variability of SSD is strongly inversely correlated to that of TCC and LCC, indicating short‐term variability of SSD is dominantly determined by cloudiness. A positive correlation between decadal changes in SSD and TCC suggests long‐term change in TCC cannot account for the decreasing trend in SSD. Long‐term change in LCC appears to be one of important contributors to the trend in SSD in southern China, where long‐term changes in SSD are inversely correlated to those of LCC. The decreasing trend in SSD is contributed by the declines in average SSDs under clear sky (13%), cloudy (51%), and overcast conditions (36%), 30% of which is offset by an increase in the frequency of clear sky.
登录
查看更多内容
影响因子：
5.2
作者：
Xiaobo Zheng;Wei-min Kang;T. Zhao;Y. Luo;C. Duan;Juan Chen
通讯作者：
Xiaobo Zheng;Wei-min Kang;T. Zhao;Y. Luo;C. Duan;Juan Chen
影响因子：
5.2
作者：
Che, Huizheng;Zhang, Xiaoye;Qu, John J.
通讯作者：
Qu, John J.
影响因子：
--
作者：
X. Xia;Pucai C. Wang;H. Chen;F. Liang
通讯作者：
X. Xia;Pucai C. Wang;H. Chen;F. Liang
影响因子：
--
作者：
A. Sanchez‐Lorenzo;M. Brunetti;J. Calbó;J. Martín-Vide
通讯作者：
A. Sanchez‐Lorenzo;M. Brunetti;J. Calbó;J. Martín-Vide
影响因子：
4.4
作者：
Makowski, Knut;Jaeger, Eric B.;Ohmura, Atsuniu
通讯作者：
Ohmura, Atsuniu