Anomalously weak Labrador Sea convection and Atlantic overturning during the past 150 years

@article{Thornalley2018AnomalouslyWL,
  title={Anomalously weak Labrador Sea convection and Atlantic overturning during the past 150 years},
  author={David J. R. Thornalley and Delia W. Oppo and Pablo Ortega and Jon I. Robson and Chris M. Brierley and Renee Davis and Ian R. Hall and Paola Moffa-S{\'a}nchez and Neil L. Rose and Peter T. Spooner and Igor Yashayaev and Lloyd D. Keigwin},
  journal={Nature},
  year={2018},
  volume={556},
  pages={227-230}
}
The Atlantic meridional overturning circulation (AMOC) is a system of ocean currents that has an essential role in Earth’s climate, redistributing heat and influencing the carbon cycle1, 2. The AMOC has been shown to be weakening in recent years1; this decline may reflect decadal-scale variability in convection in the Labrador Sea, but short observational datasets preclude a longer-term perspective on the modern state and variability of Labrador Sea convection and the AMOC1, 3–5. Here we… Expand
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References

SHOWING 1-10 OF 79 REFERENCES
Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
Possible changes in Atlantic meridional overturning circulation (AMOC) provide a key source of uncertainty regarding future climate change. Maps of temperature trends over the twentieth century showExpand
Observing the Atlantic Meridional Overturning Circulation yields a decade of inevitable surprises
TLDR
A decade of observations of the Atlantic Meridional Overturning Circulation reveal an unexpected amount of variability over time scales from seasonal to decadal, as well as a general weakening over this time. Expand
Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age
Despite the relative climate stability of the present interglacial, it has been punctuated by several centennial time scale climatic oscillations, the latest of which are often colloquially referredExpand
Holocene oscillations in temperature and salinity of the surface subpolar North Atlantic
TLDR
The temperature and salinity changes of a substantial surface inflow to a region of deep-water formation throughout the Holocene are investigated and suggest that such a negative feedback mechanism may have operated during past intervals of climate change. Expand
Recent increases in Arctic freshwater flux affects Labrador Sea convection and Atlantic overturning circulation
TLDR
It is suggested that changes in LSW can be directly linked to recent freshening, and a possible link to AMOC weakening is suggested. Expand
An abrupt weakening of the subpolar gyre as trigger of Little Ice Age-type episodes
We investigate the mechanism of a decadal-scale weakening shift in the strength of the subpolar gyre (SPG) that is found in one among three last millennium simulations with a state-of-the-art EarthExpand
Mechanisms of decadal variability in the Labrador Sea and the wider North Atlantic in a high-resolution climate model
A necessary step before assessing the performance of decadal predictions is the evaluation of the processes that bring memory to the climate system, both in climate models and observations. TheseExpand
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years
The subpolar North Atlantic Ocean (SPNA) is of key importance for modulating the climate of NW Europe because of heat loss to the atmosphere from the North Atlantic Current. Although hydrographicExpand
Solar forcing of North Atlantic surface temperature and salinity over the past millennium
There were several centennial-scale fluctuations in the climate and oceanography of the North Atlantic region over the past 1,000 years, including a period of relative cooling from about AD 1450 toExpand
Observations, inferences, and mechanisms of the Atlantic Meridional Overturning Circulation: A review
This is a review about the Atlantic Meridional Overturning Circulation (AMOC), its mean structure, temporal variability, controlling mechanisms, and role in the coupled climate system. The AMOC playsExpand
...
1
2
3
4
5
...