Impacts of Merging Profiler and Rawinsonde Winds on TOGA COARE Analyses
Impacts of Merging Profiler and Rawinsonde Winds on TOGA COARE Analyses
复制标题
合并 Profiler 和 Rawinsonde 风对 TOGA COARE 分析的影响
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Richard H. Johnson
中科院分区：
文献类型：
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作者：
P. Ciesielski;L. Hartten;Richard H. Johnson
在热带海洋全球大气耦合海洋大气响应实验的密集观测期间，在六个综合探测系统（ISS）站点和印度尼西亚比亚克进行了大量并置的罗文探空仪和剖面仪风观测。为了减轻由于风观测缺失和不良而导致的原始探空仪数据集的局限性，开发了一种程序，将剖面仪和探空仪风结合起来，生成一个集成的、高质量的高空探测数据集。除了提高风的整体质量之外，该过程还消除了探空仪数据集中的几个数据间隙。例如，在 800 hPa 以下，陆基国际空间站站点的不良和缺失风数据量从约 45% 减少到 20%。本文描述了将探空仪和剖面仪风组合成单个连贯合并数据集的过程。通过检查这次合并对各种大气分析的影响，作者发现剖面风的纳入会导致分析发生一些重大变化，特别是在每日到每周的时间尺度上。为了评估这些变化是否有所改善，将使用和不使用风廓线仪分析得出的预算降雨量估算值与基于特殊传感器微波/成像仪卫星的估算值进行比较。总体而言，这一比较表明，将剖面仪风纳入探空仪数据集对分析具有有益的影响。描述了通过互联网访问本文考虑的七个站点的合并数据集的信息。
During the intensive observing period of the Tropical Ocean Global Atmosphere Coupled Ocean‐Atmosphere Response Experiment, a large number of collocated rawinsonde and profiler wind observations were taken at six Integrated Sounding System (ISS) sites and Biak, Indonesia. To mitigate limitations in the rawinsonde dataset due to missing and bad wind observations, a procedure was developed to combine profiler and sonde winds to produce an integrated, high-quality, upper-air sounding dataset. In addition to improving the overall quality of the winds, this procedure eliminates several data gaps in the sonde dataset. For example, below 800 hPa the amount of bad and missing wind data is reduced from about 45% to 20% at the land-based ISS sites. This paper describes the procedure for combining sonde and profiler winds into a single, coherent merged dataset. Examining the impact of this merger upon various atmospheric analyses, the authors find that inclusion of profiler winds results in some substantial changes in the analyses, particularly on daily to weekly timescales. To assess whether these changes are an improvement, budget-derived rainfall estimates from analyses with and without profiler winds are compared to Special Sensor Microwave/Imager satellite-based estimates. Overall, this comparison shows that inclusion of profiler winds into the sonde dataset has a beneficial impact upon the analyses. Information for accessing the merged datasets for the seven sites considered in this paper via the Internet is described.