Effective Vertical Diffusion by Atmospheric Gravity Waves
Effective Vertical Diffusion by Atmospheric Gravity Waves
复制标题
大气重力波的有效垂直扩散
DOI：
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复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Han L. Liu
中科院分区：
文献类型：
--
作者：
Han L. Liu
由于模式分辨率有限，全球模式中由重力波（GWs）产生的热量和成分输运的量化具有挑战性。目前的参数化方案过于简单化，往往低估了传输率。本文利用基于尺度不变性的高分辨率全大气群落气候模式（WACCM）模拟，探索了一种量化有效垂直涡旋扩散的新方法。WACCM模拟可以对水平波长250 km的中尺度GW谱进行部分解析，直接计算了这些波的热流密度和有效垂直涡扩散。然后根据h - L概述的方法，基于尺度不变性推导出较小尺度、未解析波的有效垂直扩散。Liu（2019）在量化GW动量通量和强迫方面的研究。得到的有效垂直扩散通常大于参数化得到的扩散，并与中间层和低层热层观测得到的扩散相当。
Quantification of heat and constituent transport by gravity waves (GWs) in global models is challenging due to limited model resolutions. Current parameterization schemes suffer from oversimplification and often underestimate the transport rate. In this study, a new approach is explored to quantify the effective vertical eddy diffusion by using a high‐resolution Whole Atmosphere Community Climate Model (WACCM) simulation based on scale invariance. The WACCM simulation can partially resolve the mesoscale GW spectrum down to 250 km horizontal wavelength, and the heat flux and the effective vertical eddy diffusion by these waves are calculated directly. The effective vertical diffusion by the smaller‐scale, unresolved waves, is then deduced based on scale invariance, following the method outlined by H.‐L. Liu (2019) in quantifying GW momentum flux and forcing. The effective vertical diffusion obtained is generally larger than that obtained from parameterizations, and is comparable with that derived from observations in the mesosphere and lower thermosphere region.
DOI：
10.1002/jgrd.50708
发表时间：
2013-08
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
W. Feng;D. Marsh;M. Chipperfield;D. Janches;J. Höffner;F. Yi;J. Plane
通讯作者：
W. Feng;D. Marsh;M. Chipperfield;D. Janches;J. Höffner;F. Yi;J. Plane
根据原子氧和二氧化碳气候学确定中层和低层热层的全球平均涡扩散传输
DOI：
10.1029/2019jd031329
发表时间：
2019
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
Swenson, G. R.;Salinas, C. C.;Vargas, F.;Zhu, Y.;Kaufmann, M.;Jones, M.;Drob, D. P.;Liu, A.;Yue, J.;Yee, J. H.
通讯作者：
Yee, J. H.
DOI：
10.1016/j.jastp.2018.05.014
发表时间：
2018-10
影响因子：
1.9
作者：
G. Swenson;Y. Yee;F. Vargas;A. Liu
通讯作者：
G. Swenson;Y. Yee;F. Vargas;A. Liu