The neutral dynamics during the 2009 sudden stratosphere warming simulated by different whole atmosphere models
The neutral dynamics during the 2009 sudden stratosphere warming simulated by different whole atmosphere models
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DOI：
10.1002/2013ja019421
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发表时间：
2014-02
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影响因子：
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通讯作者：
N. Pedatella;T. Fuller‐Rowell;H. Wang;H. Jin;Y. Miyoshi;H. Fujiwara;H. Shinagawa;H. Liu;F. Sassi;H. Schmidt;V. Matthias;L. Goncharenko
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文献类型：
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作者：
N. Pedatella;T. Fuller‐Rowell;H. Wang;H. Jin;Y. Miyoshi;H. Fujiwara;H. Shinagawa;H. Liu;F. Sassi;H. Schmidt;V. Matthias;L. Goncharenko
本研究比较了2009年平流层突然变暖（SSW）的模拟从四个不同的全大气模式。比较中包括的模式是高层大气和电离层的地面到地面模式，中性和电离大气的汉堡模式，全大气模式和全大气社区气候模式扩展版本（WACCM-X）。比较的重点是纬向平均，行星波，潮汐变率在中高层大气在2009年SSW。模式模拟局限于低层大气，因此模拟的纬向平均和行星波变率在101百帕（50公里）以下是相似的。除了WACCM-X被限制在0.002百帕（92公里）之外，这些模式在更高的高度上不受限制，导致中间层和热层的模式模拟之间存在相当大的差异。我们属性的差异，在较高的海拔高度，主要是由于不同的重力波阻力参数化。在中层和低热层，我们发现迁移潮和非迁移潮的模式模拟之间既有相似之处，也有不同之处。迁移的日潮（DW 1）是相似的，在所有的模型模拟。模型模拟揭示了类似的迁移半日潮（SW 2）的振幅和相位的时间演化，但是，绝对SW 2振幅显着不同。通过比较纬向平均，行星波，潮汐变率在2009年的SSW，本研究的结果提供了洞察方面的中层和高层大气变率被认为是强大的功能，以及方面，应考虑显着的不确定性。
The present study compares simulations of the 2009 sudden stratospheric warming (SSW) from four different whole atmosphere models. The models included in the comparison are the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy, Hamburg Model of the Neutral and Ionized Atmosphere, Whole Atmosphere Model, and Whole Atmosphere Community Climate Model Extended version (WACCM‐X). The comparison focuses on the zonal mean, planetary wave, and tidal variability in the middle and upper atmosphere during the 2009 SSW. The model simulations are constrained in the lower atmosphere, and the simulated zonal mean and planetary wave variability is thus similar up to ∼1 hPa (50 km). With the exception of WACCM‐X, which is constrained up to 0.002 hPa (92 km), the models are unconstrained at higher altitudes leading to considerable divergence among the model simulations in the mesosphere and thermosphere. We attribute the differences at higher altitudes to be primarily due to different gravity wave drag parameterizations. In the mesosphere and lower thermosphere, we find both similarities and differences among the model simulated migrating and nonmigrating tides. The migrating diurnal tide (DW1) is similar in all of the model simulations. The model simulations reveal similar temporal evolution of the amplitude and phase of the migrating semidiurnal tide (SW2); however, the absolute SW2 amplitudes are significantly different. Through comparison of the zonal mean, planetary wave, and tidal variability during the 2009 SSW, the results of the present study provide insight into aspects of the middle and upper atmosphere variability that are considered to be robust features, as well as aspects that should be considered with significant uncertainty.