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DOI | 10.1175/JAS-D-19-0123.1 |
Variability of the Stratospheric Quasi-Biennial Oscillation and Its Wave Forcing Simulated in the Beijing Climate Center Atmospheric General Circulation Model | |
Lu, Yixiong1; Wu, Tongwen1; Jie, Weihua1; Scaife, Adam A.2,3; Andrews, Martin B.2; Richter, Jadwiga H.4 | |
2020 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:1页码:149-165 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; England; USA |
英文摘要 | It is well known that the stratospheric quasi-biennial oscillation (QBO) is forced by equatorial waves with different horizontal/vertical scales, including Kelvin waves, mixed Rossby-gravity (MRG) waves, inertial gravity waves (GWs), and mesoscale GWs, but the relative contribution of each wave is currently not very clear. Proper representation of these waves is critical to the simulation of the QBO in general circulation models (GCMs). In this study, the vertical resolution in the Beijing Climate Center Atmospheric General Circulation Model (BCC-AGCM) is increased to better represent large-scale waves, and a mesoscale GW parameterization scheme, which is coupled to the convective sources, is implemented to provide unresolved wave forcing of the QBO. Results show that BCC-AGCM can spontaneously generate the QBO with realistic periods, amplitudes, and asymmetric features between westerly and easterly phases. There are significant spatiotemporal variations of parameterized convective GWs, largely contributing to a great degree of variability in the simulated QBO. In the eastward wind shear of the QBO at 20 hPa, forcing provided by resolved waves is 0.1-0.2 m s(-1) day(-1) and forcing provided by parameterized GWs is similar to 0.15 m s(-1) day(-1). On the other hand, westward forcings by resolved waves and parameterized GWs are similar to 0.1 and 0.4-0.5 m s(-1) day(-1), respectively. It is inferred that the eastward forcing of the QBO is provided by both Kelvin waves and mesoscale convective GWs, whereas the westward forcing is largely provided by mesoscale GWs. MRG waves barely contribute to the formation of the QBO in the model. |
英文关键词 | Gravity waves Quasibiennial oscillation Waves atmospheric General circulation models Tropical variability |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000502379000001 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; GRAVITY-WAVE ; EQUATORIAL WAVES ; MOMENTUM FLUX ; PARAMETERIZATION ; QBO ; IMPROVEMENTS ; SPECTRUM ; IMPACTS ; DRAG |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280252 |
专题 | 地球科学 |
作者单位 | 1.China Meteorol Adm, Beijing Climate Ctr, Beijing, Peoples R China; 2.Met Off Hadley Ctr, Exeter, Devon, England; 3.Univ Exeter, Exeter, Devon, England; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Lu, Yixiong,Wu, Tongwen,Jie, Weihua,et al. Variability of the Stratospheric Quasi-Biennial Oscillation and Its Wave Forcing Simulated in the Beijing Climate Center Atmospheric General Circulation Model[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(1):149-165. |
APA | Lu, Yixiong,Wu, Tongwen,Jie, Weihua,Scaife, Adam A.,Andrews, Martin B.,&Richter, Jadwiga H..(2020).Variability of the Stratospheric Quasi-Biennial Oscillation and Its Wave Forcing Simulated in the Beijing Climate Center Atmospheric General Circulation Model.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(1),149-165. |
MLA | Lu, Yixiong,et al."Variability of the Stratospheric Quasi-Biennial Oscillation and Its Wave Forcing Simulated in the Beijing Climate Center Atmospheric General Circulation Model".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.1(2020):149-165. |
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