Coordination of the SPP 1167: Study of the process chain and predictability of precipitation by combining the D-PHASE ensemble and the COPS data sets in the COPS domain

与天气预报模式在其他领域取得的进展相比，过去16年天气预报模式在改进定量降水预报方面并没有取得成功。这种停滞的一个原因是缺乏可用于模型验证和数据同化的全面、高质量的数据集，从而导致数值模型中的初始场得到改进。理论分析已经确定了测量数据必须满足的需求，以缩小过程理解中的差距。实地活动表明，最新一代遥感系统有可能产生所需质量的数据集。因此，是时候将最强大的遥感仪器与经过验证的地面和机载测量技术在密集观测期内结合起来了。它的目标是通过产生未实现精度和分辨率的所需数据集，作为spp1167的骨干。这需要周密的科学准备和有关机构努力之间的认真协调。首次在一个足够大的区域内同时观测到对流前的环境、云的形成、降水的发生、发展及其强度。这将通过IOP与国际项目的结合，以及欧洲、美国和其他国家顶尖科学家的合作来实现。因此，IOP是一个独特的机会，使德国成为以最新一代测量系统（如扫描雷达和激光雷达）为特色的国际实地活动的设置，并导致大气科学的杰出进步。

In contrast to their advances in other areas, weather forecast models have not been successful in improving the Quantitative Precipitation Forecast during the last 16 years. One reason for this stagnation is the lack of comprehensive, high-quality data sets usable for model validation as well as for data assimilation, thus leading to improved initial fields in numerical models. Theoretical analyses have identified the requirements measured data have to meet in order to close the gaps in process understanding. In field campaigns, it has been shown that the newest generation of remote sensing systems has the potential to yield data sets of the required quality. It is therefore time to combine the most powerful remote sensing instruments with proven ground-based and airborne measurement techniques in an Intensive Observations Period (IOP). Its goal is to serve as a backbone for the SPP 1167 by producing the demanded data sets of unachieved accuracy and resolution. This requires a sophisticated scientific preparation and a careful coordination between the efforts of the institutions involved. For the first time, the pre-convective environment, the formation of clouds and the onset and development of precipitation as well as its intensity will be observed in four dimensions simultaneously in a region of sufficient size. This shall be achieved by combining the IOP with international programs and by collaboration between leading scientists in Europe, US and other countries. Thus, the IOP is a unique opportunity to make Germany the setting of an international field campaign featuring the newest generation of measurement systems such as scanning radar and lidar and leading to outstanding advances in atmospheric sciences.