Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3336-8 |
Ocean and atmosphere feedbacks affecting AMOC hysteresis in a GCM | |
Jackson, L. C.1; Smith, R. S.2; Wood, R. A.1 | |
2017-07-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Theories suggest that the Atlantic Meridional Overturning Circulation (AMOC) can exhibit a hysteresis where, for a given input of fresh water into the north Atlantic, there are two possible states: one with a strong overturning in the north Atlantic (on) and the other with a reverse Atlantic cell (off). A previous study showed hysteresis of the AMOC for the first time in a coupled general circulation model (Hawkins et al. in Geophys Res Lett. doi:10.1029/2011GL047208, 2011). In this study we show that the hysteresis found by Hawkins et al. (2011) is sensitive to the method with which the fresh water input is compensated. If this compensation is applied throughout the volume of the global ocean, rather than at the surface, the region of hysteresis is narrower and the off states are very different: when the compensation is applied at the surface, a strong Pacific overturning cell and a strong Atlantic reverse cell develops; when the compensation is applied throughout the volume there is little change in the Pacific and only a weak Atlantic reverse cell develops. We investigate the mechanisms behind the transitions between the on and off states in the two experiments, and find that the difference in hysteresis is due to the different off states. We find that the development of the Pacific overturning cell results in greater atmospheric moisture transport into the North Atlantic, and also is likely responsible for a stronger Atlantic reverse cell. These both act to stabilize the off state of the Atlantic overturning. |
英文关键词 | MOC THC Hysteresis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403716500011 |
WOS关键词 | MERIDIONAL OVERTURNING CIRCULATION ; ATLANTIC THERMOHALINE CIRCULATION ; NORTH PACIFIC ; GLOBAL CLIMATE ; STABILITY ; RECOVERY ; MODEL ; SHUTDOWN ; VERSION |
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/35790 |
专题 | 气候变化 |
作者单位 | 1.Met Off Hadley Ctr, Exeter, Devon, England; 2.Univ Reading, Dept Meteorol, NCAS Climate, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Jackson, L. C.,Smith, R. S.,Wood, R. A.. Ocean and atmosphere feedbacks affecting AMOC hysteresis in a GCM[J]. CLIMATE DYNAMICS,2017,49. |
APA | Jackson, L. C.,Smith, R. S.,&Wood, R. A..(2017).Ocean and atmosphere feedbacks affecting AMOC hysteresis in a GCM.CLIMATE DYNAMICS,49. |
MLA | Jackson, L. C.,et al."Ocean and atmosphere feedbacks affecting AMOC hysteresis in a GCM".CLIMATE DYNAMICS 49(2017). |
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