The Response of the Southern Hemisphere Middle Atmosphere to the Madden–Julian Oscillation during Austral Winter Using the Specified-Dynamics Whole Atmosphere Community Climate Model
The Response of the Southern Hemisphere Middle Atmosphere to the Madden–Julian Oscillation during Austral Winter Using the Specified-Dynamics Whole Atmosphere Community Climate Model
复制标题
利用指定动力学全大气群落气候模型研究南半球中层大气对南半球冬季马登朱利安涛动的响应
DOI：
10.1175/jcli-d-17-0063.1
复制
发表时间：
2017-09
影响因子：
4.9
通讯作者：
Xiankang Dou
中科院分区：
文献类型：
--
作者：
Chengyun Yang;Tao Li;Anne K. Smith;Xiankang Dou
本文利用特定动力学（SD）的全大气群落气候模式（SD-WACCM），研究了马登-朱利安振荡（MJO）对南半球隆冬平流层和中间层的影响。temperature.toERA-Interim数据和SD-WACCM模拟中，发现SH极冠对MJO的最显著响应出现在MJO第1阶段（P1）后约30天和MJO第5阶段（P5）后约10天。200和500百帕高度anomalies.in资料表明，当印度洋东部和西太平洋MJO对流增强时，波列从印度洋和太平洋发出。其结果是，SH平流层中高纬度行星波的向上传播和耗散显著增强，SH平流层Brewer-Dobson（BD）环流加强，SH极地平流层温度升高。平流层中的波数1是MJO对流引起的PW扰动的主要分量。在中间层，MJO导致由于风过滤作用而在中间层外传播的重力波（GWs）的耗散和破碎增强，并导致中间层中高纬度地区的异常下降流。因此，环流发生了显著变化，导致中间层对MJO.P1和P5的异常冷却分别滞后10天和30天。
Using the specified-dynamics (SD) Whole Atmosphere Community Climate Model (SD-WACCM), the.effects of the Madden–Julian oscillation (MJO) on the midwinter stratosphere and mesosphere in the.Southern Hemisphere (SH) are investigated. The most significant responses of the SH polar cap temperature.to the MJO are found about 30 days after MJO phase 1 (P1) and about 10 days after MJO phase 5 (P5) in both.the ERA-Interim data and the SD-WACCMsimulation. The 200- and 500-hPa geopotential height anomalies.in the SH reveal that wave trains emanate from the Indian and Pacific Oceans when the MJO convection is.enhanced in the eastern Indian Ocean and the western Pacific. As a result, the upward propagation and.dissipation of planetary waves (PWs) in the middle and high latitudes of the SH stratosphere is significantly.enhanced, the Brewer–Dobson (BD) circulation in the SH stratosphere strengthens, and temperatures in the.SH polar stratosphere increase. Wavenumber 1 in the stratosphere is the dominant component of the PW.perturbation induced by the MJO convection. In the SH mesosphere, the MJO leads to enhancement of the.dissipation and breaking of gravity waves (GWs) propagating as a result of wind-filtering change in the SH.extratropics and causes anomalous downwelling in the middle and high latitudes of the mesosphere. The.circulation thus changes significantly, resulting in anomalous cooling in the mesosphere in response to MJO.P1 and P5 at lags of 10 and 30 days, respectively.
登录
查看更多内容
影响因子：
4.9
作者：
Tao Li;N. Calvo;J. Yue;J. Russell;Anne K. Smith;M. Mlynczak;A. Chandran;X. Dou;A. Liu
通讯作者：
Tao Li;N. Calvo;J. Yue;J. Russell;Anne K. Smith;M. Mlynczak;A. Chandran;X. Dou;A. Liu
影响因子：
4.9
作者：
Carvalho, LMV;Jones, C;Ambrizzi, T
通讯作者：
Ambrizzi, T
影响因子：
3.1
作者：
K. Seo;S. Son
通讯作者：
K. Seo;S. Son
影响因子：
5.2
作者：
A. Matthews;M. Meredith
通讯作者：
A. Matthews;M. Meredith
影响因子：
4.9
作者：
C. Yoo;Sukyoung Lee;S. Feldstein
通讯作者：
C. Yoo;Sukyoung Lee;S. Feldstein