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

与其他领域的进展相反，在过去的16年里，天气预报模型在改进定量降水预报方面并不成功。这种停滞的原因之一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初始场的改进。理论分析已经确定了测量数据必须满足的要求，以缩小过程理解方面的差距。实地活动表明，最新一代的遥感系统有可能产生所需质量的数据集。因此，现在是将最强大的遥感仪器与经过验证的地面和空中测量技术结合起来的时候了。它的目标是作为SPP 1167的骨干，通过产生所需的数据集的未实现的精度和分辨率。这需要进行复杂的科学准备以及相关机构之间的仔细协调。这是第一次，对流前的环境，云的形成和降水的开始和发展以及其强度将在一个足够大的区域同时在四个维度上观察。这将通过将IOP与国际计划相结合以及通过欧洲、美国和其他国家的领先科学家之间的合作来实现。因此，IOP是一个独特的机会，使德国成为国际实地活动的背景，其特点是最新一代的测量系统，如扫描雷达和激光雷达，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.