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A permanent Raman lidar station in the Amazon: description, characterization, and first results

机译：亚马逊的永久拉曼Lidar站：描述，表征和第一个结果

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A permanent UV Raman lidar station, designed to perform continuous measurements of aerosols and water vapor and aiming to study and monitor the atmosphere from weather to climatic time scales, became operational in the central Amazon in July 2011. The automated data acquisition and internet monitoring enabled extended hours of daily measurements when compared to a manually operated instrument. This paper gives a technical description of the system, presents its experimental characterization and the algorithms used for obtaining the aerosol optical properties and identifying the cloud layers. Data from one week of measurements during the dry season of 2011 were analyzed as a mean to assess the overall system capability and performance. Both Klett and Raman inversions were successfully applied. A comparison of the aerosol optical depth from the lidar and from a co-located Aerosol Robotic Network (AERONET) sun photometer showed a correlation coefficient of 0.86. By combining nighttime measurements of the aerosol lidar ratio (50–65 sr), back-trajectory calculations and fire spots observed from satellites, we showed that observed particles originated from biomass burning. Cirrus clouds were observed in 60% of our measurements. Most of the time they were distributed into three layers between 11.5 and 13.4 km a.g.l. The systematic and long-term measurements being made by this new scientific facility have the potential to significantly improve our understanding of the climatic implications of the anthropogenic changes in aerosol concentrations over the pristine Amazonia.
机译：永久紫外拉曼利坎岛站，旨在进行气溶胶和水蒸气的连续测量，旨在从天气到气候时间尺度进行研究和监控气氛，于2011年7月在亚马逊中部开展。启用自动数据采集和互联网监控与手动操作仪器相比，日常测量的延长时间。本文给出了系统的技术描述，呈现了其实验表征和用于获得气溶胶光学性质并识别云层的算法。分析了2011年干旱季节期间测量一周的数据作为评估整体系统能力和性能的平均值。成功应用了Klett和Raman enversions。来自延雷达的气溶胶光学深度和共同定位的气溶胶机器人网络（AEROONET）太阳光度计的比较显示了0.86的相关系数。通过组合气溶胶激光雷达比率（50-65 SR）的夜间测量，从卫星观察到的后轨道计算和火点，我们显示观察到的颗粒源自生物质燃烧。在60％的测量中观察到卷云云。他们的大部分时间都分成11.5和13.4 km a.g.l.这种新的科学设施制定的系统和长期测量有可能显着提高我们对气溶胶浓度在原始亚马逊上的人为浓度的气候影响的理解。

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