Abstract. During the Water Vapor Lidar Network Assimilation (WaLiNeAs) campaign, 8 lidars specifically designed to measure water vapor mixing ratio (WVMR) profiles were deployed on the western Mediterranean coast. The main objectives were to investigate the water vapor content during case studies of heavy precipitation events in the coastal Western Mediterranean and assess the impact of high spatio-temporal WVMR data on numerical weather prediction forecasts by means of state–of–the–art assimilation techniques. Given the increasing occurrence of extreme events due to climate change, WaLiNeAs is the first program in Europe to provide network–like, simultaneous and continuous water vapor profile measurements. This paper focuses on the WVMR profiling datasets obtained from three of the lidars managed by the French component of the WaLiNeAs team. These lidars were deployed in the towns of Coursan, Grau du Roi and Cannes. This measurement setup enabled monitoring of the water vapor content within the low troposphere along a period of three months over autumn – winter 2022 and four months in summer 2023. The lidars measured the WVMR profiles from the surface up to approximately 6–10 km at night, and 1–2 km during daytime; with a vertical resolution of 100 m and a time sampling between 15 – 30 min, selected to meet the needs of weather forecasting with an uncertainty lower than 0.4 g kg^-1. The paper presents details about the instruments, the experimental strategy, as well as the datasets given in NETcdf format. The final dataset is divided in two datasets, the first with a time resolution of 15 min, which contains a total of 26 423 WVMR vertical profiles and the second with a time resolution of 30 min to improve the signal to noise ratio and signal altitude range.

中文翻译：

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WaLiNeAs 框架内多个地点的水蒸气拉曼激光雷达观测

摘要。在水蒸气激光雷达网络同化 (WaLiNeAs) 活动期间，在地中海西海岸部署了 8 台专门设计用于测量水蒸气混合比 (WVMR) 剖面的激光雷达。主要目标是调查西地中海沿岸强降水事件案例研究中的水汽含量，并通过最先进的同化技术评估高时空 WVMR 数据对数值天气预报的影响。鉴于气候变化导致的极端事件日益增多，WaLiNeAs 是欧洲第一个提供网络式、同步和连续水汽剖面测量的项目。本文重点介绍从 WaLiNeAs 团队法国部分管理的三个激光雷达获得的 WVMR 分析数据集。这些激光雷达部署在 Coursan、Grau du Roi 和戛纳等城镇。这种测量装置能够在 2022 年秋冬季的三个月和 2023 年夏季的四个月内监测对流层低层的水蒸气含量。激光雷达在夜间测量从地表到约 6-10 公里的 WVMR 剖面，白天1-2公里；垂直分辨率为100 m，采样时间为15~30 min，满足不确定度低于0.4 g kg ^-1的天气预报需求。本文介绍了有关仪器、实验策略以及以 NETcdf 格式给出的数据集的详细信息。最终数据集分为两个数据集，第一个数据集的时间分辨率为15分钟，总共包含26 423个WVMR垂直剖面，第二个数据集的时间分辨率为30分钟，以提高信噪比和信号高度范围。