文章基本信息

标题：A high-top version of IAP-AGCM: Preliminary assessment and sensitivity IAP-AGCM
本地全文：下载
作者：Zhaoyang Chai ; Minghua Zhang ; Qingcun Zeng 等
期刊名称：Atmospheric and Oceanic Science Letters
印刷版ISSN：1674-2834
电子版ISSN：2376-6123
出版年度：2021
卷号：14
期号：2
页码：100025-100031
DOI：10.1016/j.aosl.2020.100025
出版社：Taylor and Francis Ltd
摘要：Extending the atmospheric model top to high altitude is important for simulation of upper atmospheric phenomena, such as the stratospheric quasi-biennial oscillation. The high-top version of the Institute of Atmospheric Physics Atmospheric General Circulation Model with 91 vertical layers (IAP-AGCML91) extends to the mesopause at about 0.01 hPa (~80 km). The high-top model with a fully resolved stratosphere is found to simulate a warmer stratosphere than the low-top version, except near the South Pole, thus reducing its overall cold bias in the stratosphere, and significantly in the upper stratosphere. This sensitivity is shown to be consistent with two separate mechanisms: larger shortwave heating and larger poleward stratospheric meridional eddy heat flux in the hightop model than in the low-top model. Results indicate a significant influence of vertical resolution and model top on climate simulations in IAP-AGCM.
关键词：IAP-AGCM Middle atmosphere Stratosphere Radiative heating Transient heat flux