Tropospheric transport differences between models using the same large‐scale meteorological fields
Tropospheric transport differences between models using the same large‐scale meteorological fields
复制标题
使用相同大尺度气象场的模型之间的对流层输送差异
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Kinnison
中科院分区：
文献类型：
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作者：
C. Orbe;D. Waugh;Huang Yang;J. Lamarque;S. Tilmes;D. Kinnison
化学物质的输送是对流层组成模拟中的一个主要不确定因素。一种常见的方法是利用气象分析中的风来运输气体，或者直接在化学运输模型中使用它们，或者在一般环流模型中限制气流。在这里，我们比较了几种不同模型中理想化示踪剂的传输，这些模型使用了来自现代回顾性研究与应用分析（MERRA）的相同气象场。研究表明，尽管模式使用相同的气象场，但由于模拟之间参数化对流的巨大差异，它们的全球尺度对流层输送存在实质性差异。此外，我们发现受相同大尺度流约束的模拟之间的输运差异大于自由运行模拟之间的差异，后者具有不同的大尺度流，但对流质量通量更相似。我们的研究结果表明，为了理解模式中的大尺度对流层运输，特别是在受分析风约束的模拟中，需要更多地关注对流参数化。
The transport of chemicals is a major uncertainty in the modeling of tropospheric composition. A common approach is to transport gases using the winds from meteorological analyses, either using them directly in a chemical transport model or by constraining the flow in a general circulation model. Here we compare the transport of idealized tracers in several different models that use the same meteorological fields taken from Modern‐Era Retrospective analysis for Research and Applications (MERRA). We show that, even though the models use the same meteorological fields, there are substantial differences in their global‐scale tropospheric transport related to large differences in parameterized convection between the simulations. Furthermore, we find that the transport differences between simulations constrained with the same‐large scale flow are larger than differences between free‐running simulations, which have differing large‐scale flow but much more similar convective mass fluxes. Our results indicate that more attention needs to be paid to convective parameterizations in order to understand large‐scale tropospheric transport in models, particularly in simulations constrained with analyzed winds.