Correlations of long-lived chemical species in a middle atmosphere general circulation model
Correlations of long-lived chemical species in a middle atmosphere general circulation model
复制标题
中层大气环流模型中长寿命化学物质的相关性
DOI：
10.1029/2002jd002799
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发表时间：
2003
影响因子：
--
通讯作者：
T. Shepherd
中科院分区：
文献类型：
--
作者：
D. Sankey;T. Shepherd
[1]考虑了加拿大中层大气模式模拟的各种化学物质之间的相关性，这是一个具有完全相互作用化学的一般环流模式，目的是研究可以预期形成紧密相关性的一般条件。同时，通过分析对模型进行了验证。研究结果与先前的理论研究以及从太空和飞机上进行的大气测量结果进行了比较。这些结果强调了在处理相关性时具有良好空间覆盖的数据集的重要性，并提供了一个背景，根据该背景可以确认从大气测量中获得的相关性的紧密性。结果表明，对于寿命较长的物种，在热带、温带和南极冬季涡旋的模式中发现了明显的相关性。在这些条件下，即使是在一天的测量中，如掩星仪器产生的稀疏采样也适用于定义每个区域内的化学相关性，只要采样的混合比值范围足够大。在实践中，这意味着很大的垂直范围，尽管在更靠极地的纬度要求不那么严格。
[1] Correlations between various chemical species simulated by the Canadian Middle Atmosphere Model, a general circulation model with fully interactive chemistry, are considered in order to investigate the general conditions under which compact correlations can be expected to form. At the same time, the analysis serves to validate the model. The results are compared to previous work on this subject, both from theoretical studies and from atmospheric measurements made from space and from aircraft. The results highlight the importance of having a data set with good spatial coverage when working with correlations and provide a background against which the compactness of correlations obtained from atmospheric measurements can be confirmed. It is shown that for long-lived species, distinct correlations are found in the model in the tropics, the extratropics, and the Antarctic winter vortex. Under these conditions, sparse sampling such as arises from occultation instruments is nevertheless suitable to define a chemical correlation within each region even from a single day of measurements, provided a sufficient range of mixing ratio values is sampled. In practice, this means a large vertical extent, though the requirements are less stringent at more poleward latitudes.