On the relationship between diurnal temperature range and surface solar radiation in Europe
On the relationship between diurnal temperature range and surface solar radiation in Europe
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DOI：
10.1029/2008jd011104
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发表时间：
2009-04-08
影响因子：
4.4
通讯作者：
Ohmura, Atsuniu
中科院分区：
文献类型：
--
作者：
Makowski, Knut;Jaeger, Eric B.;Ohmura, Atsuniu
地表太阳辐射是影响局地和全球能量收支的重要因素。然而，SSR的时空变化的信息是有限的。一个更常用的可以提供这种信息的测量方法是昼夜温差。在这项研究中，我们分析了1970年至2005年在欧洲的季节和十年尺度上的DTR和SSR之间的关系。当比较的平均异常的时间序列组成的31对站点与长期SSR和DTR测量，我们发现一个相关系数为0.87的年平均值和0.61和0.92之间的季节平均异常。当单独调查的SSR和DTR的个人对，我们发现，当地的相关性大多低于欧洲的平均水平，他们迅速下降，在低入射角和高海拔地区的季节和纬度。地方和季节尺度上的最高相关性似乎与欧洲大尺度环流的变化有关。对欧洲区域气候模式的11个模拟结果证实了SSR和DTR之间的密切关系。该关系的季节依赖性很好地再现，但DTR和SSR的绝对值大多太低。SSR和DTR的减少（变暗）和增加（变亮）模式在建模的时间序列中没有重现。仍然有强有力的证据，从模型和观察，DTR是一个可靠的代表SSR。
The surface solar radiation (SSR) is an important factor influencing the local and global energy budget. However, information on the spatial and temporal variation of SSR is limited. A more commonly available measure, which may provide such information, is the diurnal temperature range (DTR). In this study we analyze the relationship between DTR and SSR in Europe between 1970 and 2005 on seasonal and decadal scale. When comparing the mean anomalies time series composed of 31 pairs of sites with long-term SSR and DTR measurements, we found a correlation coefficient of 0.87 in the annual mean and between 0.61 and 0.92 in the seasonal mean anomalies. When investigating the individual pairs of SSR and DTR individually, we found that local correlations are mostly lower than the European mean and that they decrease rapidly in seasons and latitudes with low incident angles and at high alpine altitude. The highest correlation on local and seasonal scales seems to be connected with the variability of the large-scale circulation in Europe. The output of 11 simulations of current generation regional climate models over Europe confirms the strong relationship between SSR and DTR. The seasonal dependence of the relationship is well reproduced, but the absolute values of DTR and SSR are mostly too low. The pattern of decrease (dimming) and increase (brightening) in SSR and DTR was not reproduced in the modeled time series. There is still strong evidence from both models and observations that DTR is a reliable representative of SSR.