PAR006 Optical disdrometer data at Slufter

<strong>Description:</strong> In-situ measurements of raindrop size distributions, fall velocities, drop number concentrations and surface rain rates recorded by an OTT Parsivel2 disdrometer named "PAR006" in Slufter, The Netherlands. Located in the Maasvlakte Rotterdam, The Slufter is a large-scale storage site for contaminated sludge in the southwestern part of the Rotterdam Maasvlakte, approximately 31 km West of the city center of Rotterdam. Along the ring dike of the Slufter, several wind turbines belong to the Windpark Slufterdam are providing electricity for the region. The same site also features a micro-rain radar "MRR005_Slufter" (since March 2022). All sensors are placed on top of an air quality monitoring container belonging to TNO, at a height of approx. 4 meters. The rough climate conditions near the coast of the North Sea, with high winds, salt, and sand creates a very challenging environment for long-term weather observations. Consequently, data availability tends to be lower than at other sites, due to frequent maintenance and technical issues.<br><strong>Format:</strong> Each NetCDF file covers a full month of observations. The temporal resolution is 1 minute. Data are provided "as is", without any post-processing. The NetCDF files contain all relevant information about all the variables, attributes and units. The global attributes of the NetCDF files contain important information about the type of sensor, logging software, project contributors and history of the dataset. If a monthly file is missing, no data are available for this month.<br><strong>Relevance:</strong> Optical disdrometer data are useful for studying the type, dynamics and microphysics of precipitation from the perspective of a fixed observer on the ground. The data can be used to help calibrate weather radars, improve quantitative precipitation estimates, calculate the absorption/attenuation/propagation of electromagnetic signals through the atmosphere, and quantify important physical quantities such as liquid water content, rain amount, intensity and kinetic energy.<br><strong>Note: T</strong>he integrated temperature sensor of PAR006 was defective between November 2022 and April 2023. During this period, unrealistic temperatures above 60 degrees were measured . Also, the temperature time series contain some large spikes, suggesting the existence of other (unknown) problems. The temperature sensor was replaced on April 3, 2023. However, some large temperature spikes persisted beyond that period until the whole circuit board failed in November 2023 due to corrosion. The sensor was then sent back to the manufacturer and repaired. Data collection resumed in August 2024.<strong>描述：</strong> 本数据集包含由位于荷兰斯卢夫特（Slufter）的编号为“PAR006”的OTT Parsivel2雨滴谱仪（disdrometer）采集的雨滴尺寸分布、下落末速度、雨滴数浓度以及地表降雨率的原位实测数据。斯卢夫特地处荷兰鹿特丹马斯弗拉克特（Maasvlakte Rotterdam），是鹿特丹马斯弗拉克特西南区域的大型污染污泥储放场，距鹿特丹市中心以西约31公里。沿斯卢夫特环堤分布有隶属于斯卢夫特达姆风电场（Windpark Slufterdam）的多台风力发电机组，为该区域提供电力。该站点同时部署了一台编号为“MRR005_Slufter”的微型降雨雷达（micro-rain radar），自2022年3月起投入运行。所有传感器均安装在荷兰应用科学研究组织（TNO）所属的空气质量监测集装箱顶部，安装高度约为4米。北海沿岸的恶劣气候条件——强风、高盐度与沙尘——为长期气象观测带来了极大挑战，因此受频繁维护需求与技术故障影响，本数据集的数据可用性低于其他站点。 <strong>数据格式：</strong> 每份网络通用数据格式（NetCDF）文件涵盖一整月的观测数据，时间分辨率为1分钟。数据按“现状”提供，未经过任何后处理。NetCDF文件包含所有相关变量、属性与单位信息。NetCDF文件的全局属性中包含了传感器类型、记录软件、项目贡献者以及数据集历史等重要信息。若某一月份的文件缺失，则代表该月无可用数据。 <strong>应用价值：</strong> 光学雨滴谱仪数据可用于从地面固定观测者的视角研究降水的类型、动力学特征与微物理特性。该数据可用于辅助气象雷达校准、改进定量降水估测算法、计算电磁信号在大气中的吸收/衰减/传播特性，以及量化液态水含量、降雨量、降雨强度与动能等关键物理量。 <strong>备注：</strong> PAR006的集成温度传感器在2022年11月至2023年4月期间出现故障，此期间测得的温度数值高于60摄氏度，不符合实际情况。此外，温度时间序列中存在多处大幅尖峰，表明存在其他未知问题。该温度传感器已于2023年4月3日更换，但后续仍出现温度尖峰，直至2023年11月因腐蚀导致整个电路板失效。随后传感器被送回原厂维修，并于2024年8月恢复数据采集。