Analysis of Raman lidar and radiosonde measurements from the AWEX-G field campaign and its relation to Aqua validation
Analysis of Raman lidar and radiosonde measurements from the AWEX-G field campaign and its relation to Aqua validation
复制标题
对 AWEX-G 现场活动的拉曼激光雷达和无线电探空仪测量结果进行分析及其与 Aqua 验证的关系
DOI：
10.1029/2005jd006429
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发表时间：
2006
影响因子：
--
通讯作者：
C. Barnet
中科院分区：
文献类型：
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作者：
D. Whiteman;F. Russo;B. Demoz;L. Miloshevich;I. Veselovskii;S. Hannon;Zhien Wang;H. Vömel;F. Schmidlin;B. Lesht;P. J. Moore;A. Beebe;A. Gambacorta;C. Barnet
[1]Aqua验证活动中的早期工作显示，用于提供验证数据的各种技术之间的水蒸气测量精度存在很大差异。验证测量是在全球分布的地点进行的，因此很难隔离各种传感器（包括拉曼激光雷达和无线电探空仪）之间明显测量差异的来源。因此，AIRS水汽实验场（AWEX-G）于2003年11月举行，目的是将验证技术带到一个共同的地点进行相互比较，并解决测量差异。使用科罗拉多大学的低温霜点湿度计（CFH）作为水汽参考，AWEX-G实地活动允许对拉曼激光雷达、维萨拉RS 80-H和RS 90/92进行校正技术验证，这些技术显著提高了这些系统水汽测量的绝对精度，特别是在对流层上部。无线电探空仪和激光雷达的平均值进行比较，证明校正后的传感器和CFH之间的协议，一般在5%以内，从而提供足够的精度为Aqua验证目的的数据。辐射和检索比较中使用的校正技术的例子提供和讨论。
[1] Early work within the Aqua validation activity revealed there to be large differences in water vapor measurement accuracy among the various technologies in use for providing validation data. The validation measurements were made at globally distributed sites making it difficult to isolate the sources of the apparent measurement differences among the various sensors, which included both Raman lidar and radiosonde. Because of this, the AIRS Water Vapor Experiment–Ground (AWEX-G) was held in October-November 2003 with the goal of bringing validation technologies to a common site for intercomparison and resolving the measurement discrepancies. Using the University of Colorado Cryogenic Frostpoint Hygrometer (CFH) as the water vapor reference, the AWEX-G field campaign permitted correction techniques to be validated for Raman lidar, Vaisala RS80-H and RS90/92 that significantly improve the absolute accuracy of water vapor measurements from these systems particularly in the upper troposphere. Mean comparisons of radiosondes and lidar are performed demonstrating agreement between corrected sensors and the CFH to generally within 5% thereby providing data of sufficient accuracy for Aqua validation purposes. Examples of the use of the correction techniques in radiance and retrieval comparisons are provided and discussed.