Enhanced production of Labrador Sea Water in 2008

Yashayaev, Igor; Loder, John W.

doi:10.1029/2008gl036162

Cited by 154 publications

(214 citation statements)

References 9 publications

Supporting

Mentioning

189

Contrasting

Unclassified

Order By: Relevance

“…In 2000 an LSW class, LSW 2000 , was formed in a single winter. In the winter of 2008 a similar formation of a singlewinter LSW class could be observed (Våge et al, 2009;Yashayaev and Loder, 2009). The LSW classes differed in density and other hydrographic characteristics, depending on their formation history.…”

Section: Introductionmentioning

confidence: 68%

“…Therefore these data are not fit for the study of local formation process of LSW in the Irminger Sea as proposed by Pickart et al (2003), Bacon et al, (2003), and Falina et al (2007), nor for the study of the upper LSW, formed in the Labrador Sea by shallow convection near the boundary currents (Kieke et al 2006;Rhein et al, 2007). Våge et al (2009) and Yashayaev and Loder (2009) have shown that profiling floats make a view of the deep convection process possible that cannot be achieved by the use of our or similar data sets. However, sufficient amounts of profiling float data in our research area are only available for the last 13 years (Centurion and Gould, 2004;Yashayaev and Loder, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Våge et al (2009) and Yashayaev and Loder (2009) have shown that profiling floats make a view of the deep convection process possible that cannot be achieved by the use of our or similar data sets. However, sufficient amounts of profiling float data in our research area are only available for the last 13 years (Centurion and Gould, 2004;Yashayaev and Loder, 2009). …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Decadal and multi-decadal variability of Labrador Sea Water in the north-western North Atlantic Ocean derived from tracer distributions: Heat budget, ventilation, and advection

Aken

Jong

Yashayaev

2011

Deep Sea Research Part I: Oceanographic Research Papers

Self Cite

View full text Add to dashboard Cite

a b s t r a c tTime series of profiles of potential temperature, salinity, dissolved oxygen, and planetary potential vorticity at intermediate depths in the Labrador Sea, the Irminger Sea, and the Iceland Basin have been constructed by combining the hydrographic sections crossing the sub-arctic gyre of the North Atlantic Ocean from the coast of Labrador to Europe, occupied nearly annually since 1990, and historic hydrographic data from the preceding years since 1950. The temperature data of the last 60 years mainly reflect a multi-decadal variability, with a characteristic time scale of about 50 years. With the use of a highly simplified heat budget model it was shown that this long-term temperature variability in the Labrador Sea mainly reflects the long-term variation of the net heat flux to the atmosphere. However, the analysis of the data on dissolved oxygen and planetary potential vorticity show that convective ventilation events, during which successive classes of Labrador Sea Water (LSW) are formed, occurring on decadal or shorter time scales. These convective ventilation events have performed the role of vertical mixing in the heat budget model, homogenising the properties of the intermediate layers (e.g. temperature) for significant periods of time. Both the long-term and the near-decadal temperature signals at a pressure of 1500 dbar are connected with successive deep LSW classes, emphasising the leading role of Labrador Sea convection in running the variability of the intermediate depth layers of the North Atlantic. These signals are advected to the neighbouring Irminger Sea and Iceland Basin. Advection time scales, estimated from the 60 year time series, are slightly shorter or of the same order as most earlier estimates, which were mainly based on the feature tracking of the spreading of the LSW 94 class formed in the period 1989

show abstract

Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Decadal and multi-decadal variability of Labrador Sea Water in the north-western North Atlantic Ocean derived from tracer distributions: Heat budget, ventilation, and advection

Aken

Jong

Yashayaev

2011

Deep Sea Research Part I: Oceanographic Research Papers

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nevertheless, a series of cold winters could replace these water masses with the newly ventilated LSW containing high concentrations of anthropogenic CO 2 . Consequently, the saturation horizon in the Labrador Sea will not shallow gradually, but it will be controlled by intermittent deeper convections, such as those observed in early 1990s, 2000, and 2008 [Våge et al, 2009, Yashayaev andLoder, 2009].…”

Section: The Labrador Seamentioning

confidence: 99%

Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

Azetsu-Scott¹,

Clarke²,

Falkner³

et al. 2010

J. Geophys. Res.

121

View full text Add to dashboard Cite

Ocean acidification is predicted to occur first in polar oceans. We investigated the saturation state of waters with respect to calcite (Ωcal) and aragonite (Ωarg) in six sections along an Arctic outflow pathway through the Canadian Arctic Archipelago (CAA) and into the northwestern Atlantic using dissolved inorganic carbon and total alkalinity measurements from 2003 to 2005. The study area, a key region connecting the Arctic and the North Atlantic, includes Smith Sound, Barrow Strait, Baffin Bay, Davis Strait, Hudson Strait, and the Labrador Sea. The average Ωarg in the Arctic outflow was 1.18 ± 0.17 in Barrow Strait and 1.31 ± 0.14 in Smith Sound, with areas where Ωarg < 1. The Arctic outflow through the CAA has a high content of Pacific waters, which have a low saturation state. These waters can be traced along the western Baffin Bay to Davis Strait. South of Davis Strait, this outflow is modified by mixing with slope and offshore waters of Atlantic origin and with the outflow from Hudson Strait. Despite the mixing, low saturation state water can still be identified on the southern Labrador Shelf. The aragonite saturation horizon is found at ∼150 m in Barrow Strait; at 200 m in Baffin Bay, Davis Strait, and Hudson Strait; and at 2300 m in the Labrador Sea. This study provides baseline data of the saturation states for the waters of the CAA and the northwest Atlantic. It also illustrates the downstream evolution of low saturation state Arctic outflow in the northwest Atlantic.

show abstract

“…Subsequently, in the North Atlantic, the absence of deep convection in the sub-polar gyre for over a decade from the mid-1990s to mid-2000s raised concerns that ocean circulation was already being affected by climate warming. However, there was an abrupt resumption of deep convection in the Labrador and Irminger Seas in winter (Vage et al 2009Yashayaev and Loder 2009).…”

Section: Ocean Circulationmentioning

confidence: 99%

Arctic Climate Tipping Points

Lenton

2012

AMBIO

150

View full text Add to dashboard Cite

There is widespread concern that anthropogenic global warming will trigger Arctic climate tipping points. The Arctic has a long history of natural, abrupt climate changes, which together with current observations and model projections, can help us to identify which parts of the Arctic climate system might pass future tipping points. Here the climate tipping points are defined, noting that not all of them involve bifurcations leading to irreversible change. Past abrupt climate changes in the Arctic are briefly reviewed. Then, the current behaviour of a range of Arctic systems is summarised. Looking ahead, a range of potential tipping phenomena are described. This leads to a revised and expanded list of potential Arctic climate tipping elements, whose likelihood is assessed, in terms of how much warming will be required to tip them. Finally, the available responses are considered, especially the prospects for avoiding Arctic climate tipping points.

show abstract

Enhanced production of Labrador Sea Water in 2008

Cited by 154 publications

References 9 publications

Decadal and multi-decadal variability of Labrador Sea Water in the north-western North Atlantic Ocean derived from tracer distributions: Heat budget, ventilation, and advection

Decadal and multi-decadal variability of Labrador Sea Water in the north-western North Atlantic Ocean derived from tracer distributions: Heat budget, ventilation, and advection

Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

Arctic Climate Tipping Points

Contact Info

Product

Resources

About