On the stability of the Atlantic meridional overturning circulation during the last deglaciation
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| 024 | 7 | 0 | |a 10.1007/s00382-014-2153-1 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00382-014-2153-1 | ||
| 245 | 0 | 0 | |a On the stability of the Atlantic meridional overturning circulation during the last deglaciation |h [Elektronische Daten] |c [Wei Liu, Zhengyu Liu, Jun Cheng, Haibo Hu] |
| 520 | 3 | |a Using a generalized stability indicator L, we explore the stability of the Atlantic meridional overturning circulation (AMOC) during the last deglaciation based on a paleoclimate simulation. From the last glacial maximum, as forced by various external climate forcings, notably the meltwater forcing, the AMOC experiences a collapse and a subsequent rapid recovery in the early stage of deglaciation. This change of the AMOC induces an anomalous freshwater divergence and later convergence across the Atlantic and therefore leads to a positive L, suggesting a negative basin-scale salinity advection feedback and, in turn, a mono-stable deglacial AMOC. Further analyses show that most anomalous freshwater is induced by the AMOC via the southern boundary of the Atlantic at 34°S where the freshwater transport (M ovS ) is about equally controlled by the upper branch of the AMOC and the upper ocean salinity along 34°S. From 19 to 17ka, as a result of multiple climate feedbacks associated with the AMOC change, the upper ocean at 34°S is largely salinified, which helps to induce a switch in M ovS , from import to export. Our study has important implications to the deglacial simulations by climate models. A decomposition of L shows that the AMOC stability is mostly determined by two terms, the salinity stratification at 34°S and the change of stratification with the AMOC. Both terms appear positive in model. However, the former is likely to be distorted towards positive, as associated with a common bias existing over the South Atlantic in climate models. Therefore, the AMOC is potentially biased towards mono-stability in most paleoclimate simulations. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2014 | ||
| 690 | 7 | |a AMOC |2 nationallicence | |
| 690 | 7 | |a Stability indicator |2 nationallicence | |
| 690 | 7 | |a Freshwater transport |2 nationallicence | |
| 690 | 7 | |a Feedback |2 nationallicence | |
| 690 | 7 | |a The last deglaciation |2 nationallicence | |
| 700 | 1 | |a Liu |D Wei |u Cooperative Institute for Climate and Satellites, North Carolina State University, Raleigh, NC, USA |4 aut | |
| 700 | 1 | |a Liu |D Zhengyu |u Lab. Climate, Ocean and Atmosphere Studies, Peking University, Beijing, China |4 aut | |
| 700 | 1 | |a Cheng |D Jun |u Key Laboratory of Meteorological Disaster of Ministry of Education, School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China |4 aut | |
| 700 | 1 | |a Hu |D Haibo |u School of Atmospheric Sciences, Nanjing University, Nanjing, China |4 aut | |
| 773 | 0 | |t Climate Dynamics |d Springer Berlin Heidelberg |g 44/5-6(2015-03-01), 1257-1275 |x 0930-7575 |q 44:5-6<1257 |1 2015 |2 44 |o 382 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00382-014-2153-1 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00382-014-2153-1 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Liu |D Wei |u Cooperative Institute for Climate and Satellites, North Carolina State University, Raleigh, NC, USA |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Liu |D Zhengyu |u Lab. Climate, Ocean and Atmosphere Studies, Peking University, Beijing, China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Cheng |D Jun |u Key Laboratory of Meteorological Disaster of Ministry of Education, School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Hu |D Haibo |u School of Atmospheric Sciences, Nanjing University, Nanjing, China |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Climate Dynamics |d Springer Berlin Heidelberg |g 44/5-6(2015-03-01), 1257-1275 |x 0930-7575 |q 44:5-6<1257 |1 2015 |2 44 |o 382 | ||