Abstract. The amount of energy reaching the Earth’s surface from the sun is a quantity of high importance for the climate system and for renewable energy applications. SARAH-3 is a new edition of a satellite-based climate data record of surface solar radiation parameters. It is generated and distributed by the European Organisation of Meteorological Satellites (EUMETSAT) Satellite Application Facility on Climate Monitoring (CM SAF). SARAH-3 covers more than 4 decades of data and provides a high spatial resolution of 0.05° x 0.05° and a temporal resolution of 30-minutes, daily means and monthly means. SARAH-3 consists of seven parameters including surface irradiance, direct irradiance and sunshine duration. SARAH-3 is the successor of SARAH-2.1 and is accompanied by an operational near-real time processing of all parameters – the so-called Interim Climate Data Record, enabling climate monitoring applications. The validation of SARAH-3 shows a good accuracy and stability of the data record and further improves over its predecessor. One reason for this improvement is the new treatment of snow-covered surfaces in the algorithm, reducing the misclassification of snow as clouds. The SARAH-3 climate analysis reveals an increase of the surface irradiance during the last decades in Europe.

中文翻译：

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SARAH-3 – 基于卫星的表面太阳辐射气候数据记录

摘要。从太阳到达地球表面的能量对于气候系统和可再生能源应用来说非常重要。 SARAH-3 是地面太阳辐射参数卫星气候数据记录的新版本。它由欧洲气象卫星组织 (EUMETSAT) 气候监测卫星应用设施 (CM SAF) 生成和分发。 SARAH-3 涵盖超过 4 个十年的数据，提供 0.05° x 0.05° 的高空间分辨率和 30 分钟的时间分辨率、日平均值和月平均值。 SARAH-3由表面辐照度、直接辐照度和日照时长等七个参数组成。 SARAH-3 是 SARAH-2.1 的后继版本，并伴随着对所有参数的近实时操作处理，即所谓的临时气候数据记录，从而支持气候监测应用。 SARAH-3的验证表明数据记录具有良好的准确性和稳定性，并且比其前身进一步改进。这一改进的原因之一是算法中对积雪覆盖表面的新处理，减少了将雪误分类为云的情况。 SARAH-3 气候分析揭示了过去几十年欧洲表面辐照度的增加。