Rising anthropogenic greenhouse gases, such as CO2, CH4, N2O and others, are known to absorb and emit terrestrial thermal radiation back to the Earth's surface, leading to radiative forcing and rising surface temperatures. Nonetheless, radiation measurements now show that the rapid increase in temperature over continents since the end of the last century, which is more than twice as large as the average global warming, is also related to a clearing of the sky over land surfaces, which leads to an increase in sunshine hours, and hence, increasing solar radiation absorbed at the Earth's surface. By contrasting rising temperatures with annual sunshine hours and solar and thermal radiation in Central Europe, the measurements show that thermal radiation steadily increases owing to the rising greenhouse effect. However, the rapidly increasing warming since the end of the last century has been reinforced by a strong increase in solar radiation at the surface, resulting from rising annual sunshine hours as a positive greenhouse warming feedback, which is larger than the increase in thermal greenhouse radiation, and hence, the strongest driver of the rapidly increasing warming over continents. The rapid temperature increase in Central Europe, of more than one degree over the last decade, is larger in lowlands than in the Alps.

中文翻译：

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不断增加的太阳和热温室辐射导致大陆迅速变暖

众所周知，不断增加的人为温室气体，如二氧化碳、甲烷、一氧化二氮等，会吸收地面热辐射并将其发射回地球表面，导致辐射强迫和表面温度上升。尽管如此，现在的辐射测量表明，自上世纪末以来各大洲温度的快速上升（其幅度是全球平均变暖的两倍多）也与陆地表面天空的晴朗有关，这导致日照时间增加，从而增加地球表面吸收的太阳辐射。通过将中欧不断上升的气温与年日照时数以及太阳和热辐射进行对比，测量结果表明，由于温室效应加剧，热辐射稳步增加。然而，自上世纪末以来，由于每年日照时数的增加，地表太阳辐射的强劲增加，加剧了气候变暖的迅速加剧，这是温室变暖的正反馈，其幅度大于温室热辐射的增加，并且因此，这是大陆迅速变暖的最强驱动力。中欧地区的气温在过去十年中迅速上升超过一度，低地地区的气温上升幅度比阿尔卑斯山地区的上升幅度更大。大陆迅速变暖的最有力推动因素。中欧地区的气温在过去十年中迅速上升超过一度，低地地区的气温上升幅度比阿尔卑斯山地区的上升幅度更大。大陆迅速变暖的最有力推动因素。中欧地区的气温在过去十年中迅速上升超过一度，低地地区的气温上升幅度比阿尔卑斯山地区的上升幅度更大。