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DOI | 10.1175/JCLI-D-18-0240.1 |
Phase Locking of the Boreal Summer Atmospheric Response to Dry Land Surface Anomalies in the Northern Hemisphere | |
Wang, Hailan1; Schubert, Siegfried D.1,2; Koster, Randal D.2; Chang, Yehui2,3 | |
2019-02-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:4页码:1081-1099 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Past modeling simulations, supported by observational composites, indicate that during boreal summer, dry soil moisture anomalies in very different locations within the U.S. continental interior tend to induce the same upper-tropospheric circulation pattern: a high anomaly forms over west-central North America and a low anomaly forms to the east. The present study investigates the causes of this apparent phase locking of the upper-level circulation response and extends the investigation to other land regions in the Northern Hemisphere. The phase locking over North America is found to be induced by zonal asymmetries in the local basic state originating from North American orography. Specifically, orography-induced zonal variations of air temperature, those in the lower troposphere in particular, and surface pressure play a dominant role in placing the soil moisture-forced negative Rossby wave source (dominated by upper-level divergence anomalies) over the eastern leeside of the Western Cordillera, which subsequently produces an upper-level high anomaly over west-central North America, with the downstream anomalous circulation responses phase locked by continuity. The zonal variations of the local climatological atmospheric circulation, manifested as a climatological high over central North America, help shape the spatial pattern of the upper-level circulation responses. Considering the rest of the Northern Hemisphere, the northern Middle East exhibits similar phase locking, also induced by local orography. The Middle Eastern phase locking, however, is not as pronounced as that over North America; North America is where soil moisture anomalies have the greatest impact on the upper-tropospheric circulation. |
英文关键词 | Atmosphere-land interaction Rossby waves Stationary waves Topographic effects Drought Summer/warm season |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000457325500001 |
WOS关键词 | LARGE-SCALE OROGRAPHY ; ARAKAWA-SCHUBERT ; PART I ; CIRCULATION ; MAINTENANCE ; CLIMATE ; CONVECTION ; IMPACTS ; WAVES |
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/20944 |
专题 | 气候变化 |
作者单位 | 1.Sci Syst & Applicat Inc, Lanham, MD 20706 USA; 2.NASA, Global Modeling & Assimilat Off, GSFC, Greenbelt, MD USA; 3.Morgan State Univ, Baltimore, MD 21239 USA |
推荐引用方式 GB/T 7714 | Wang, Hailan,Schubert, Siegfried D.,Koster, Randal D.,et al. Phase Locking of the Boreal Summer Atmospheric Response to Dry Land Surface Anomalies in the Northern Hemisphere[J]. JOURNAL OF CLIMATE,2019,32(4):1081-1099. |
APA | Wang, Hailan,Schubert, Siegfried D.,Koster, Randal D.,&Chang, Yehui.(2019).Phase Locking of the Boreal Summer Atmospheric Response to Dry Land Surface Anomalies in the Northern Hemisphere.JOURNAL OF CLIMATE,32(4),1081-1099. |
MLA | Wang, Hailan,et al."Phase Locking of the Boreal Summer Atmospheric Response to Dry Land Surface Anomalies in the Northern Hemisphere".JOURNAL OF CLIMATE 32.4(2019):1081-1099. |
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