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DOI | 10.1175/JCLI-D-16-0741.1 |
Global Atmospheric Teleconnections and Multidecadal Climate Oscillations Driven by Southern Ocean Convection | |
Cabre, Anna1,2; Marinov, Irina2; Gnanadesikan, Anand3 | |
2017-10-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:20 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; USA |
英文摘要 | A 1000-yr control simulation in a low-resolution coupled atmosphere-ocean model from the Geophysical Fluid Dynamics Laboratory (GFDL) family of climate models shows a natural, highly regular multidecadal oscillation between periods of Southern Ocean (SO) open-ocean convection and nonconvective periods. It is shown here that convective periods are associated with warming of the SO sea surface temperatures (SSTs), and more broadly of the Southern Hemisphere (SH) SSTs and atmospheric temperatures. This SO warming results in a decrease in the meridional gradient of SSTs in the SH, changing the large-scale pressure patterns, reducing the midlatitude baroclinicity and thus the magnitude of the southern Ferrel and Hadley cells, and weakening the SO westerly winds and the SH tropical trade winds. The rearrangement of the atmospheric circulation is consistent with the global energy balance. During convective decades, the increase in incoming top-of-the-atmosphere radiation in the SH is balanced by an increase in the Northern Hemisphere (NH) outgoing radiation. The energy supplying this increase is carried by enhanced atmospheric transport across the equator, as the intertropical convergence zone and associated wind patterns shift southward, toward the anomalously warmer SH. While the critical role of the SO for climate on long, paleoclimate time scales is now beyond debate, the strength and global scale of the teleconnections observed here also suggest an important role for the SO in global climate dynamics on the shorter interannual and multidecadal time scales. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411438000005 |
WOS关键词 | INTERTROPICAL CONVERGENCE ZONE ; MERIDIONAL OVERTURNING CIRCULATION ; SEA-ICE EXTENT ; DEEP CONVECTION ; HEAT-TRANSPORT ; SIMULATION CHARACTERISTICS ; CLOUD FEEDBACK ; PART I ; MODEL ; VARIABILITY |
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/19679 |
专题 | 气候变化 |
作者单位 | 1.Inst Marine Sci, Dept Phys & Technol Oceanog, Barcelona, Spain; 2.Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA 19104 USA; 3.Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA |
推荐引用方式 GB/T 7714 | Cabre, Anna,Marinov, Irina,Gnanadesikan, Anand. Global Atmospheric Teleconnections and Multidecadal Climate Oscillations Driven by Southern Ocean Convection[J]. JOURNAL OF CLIMATE,2017,30(20). |
APA | Cabre, Anna,Marinov, Irina,&Gnanadesikan, Anand.(2017).Global Atmospheric Teleconnections and Multidecadal Climate Oscillations Driven by Southern Ocean Convection.JOURNAL OF CLIMATE,30(20). |
MLA | Cabre, Anna,et al."Global Atmospheric Teleconnections and Multidecadal Climate Oscillations Driven by Southern Ocean Convection".JOURNAL OF CLIMATE 30.20(2017). |
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