Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate ChangeObserving deep convection in the Labrador Sea during winter 1994/95Dynamics of interdecadal climate variability: A historical perspectiveMeasuring the Atlantic meridional overturning circulation at 26°NCollapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changesStable AMOC off state in an eddy‐permitting coupled climate modelSimulating decadal variability in the North Atlantic OceanA multimodel comparison of centennial Atlantic meridional overturning circulation variabilityExploring the impact of CMIP5 model biases on the simulation of North Atlantic decadal variabilityA mechanism of internal decadal Atlantic ocean variability in a high‐resolution coupled climate modelCorrecting North Atlantic sea surface salinity biases in the Kiel Climate Model: Influences on ocean circulation and Atlantic multidecadal variabilityFifteen years of ocean observations with the global Argo arrayA multimodel study of sea surface temperature and subsurface density fingerprints of the Atlantic meridional overturning circulationInitialized decadal predictions of the rapid warming of the North Atlantic Ocean in the mid 1990sAn objective ocean temperature and salinity analysis using covariances from a global climate modelImproved surface temperature prediction for the coming decade from a global climate modelA comparison of full‐field and anomaly initialization for seasonal to decadal climate predictionChanges in Arctic melt season and implications for sea ice lossAtlantic Ocean forcing of North American and European summer climatePropagation pathways of classical Labrador Sea water from its source region to 26nDecadal evolution of ocean thermal anomalies in the North Atlantic: The effects of Ekman, overturning, and horizontal transportRecurrent replenishment of Labrador Sea water and associated decadal‐scale variabilityA decadal prediction case study: Late twentieth‐century North Atlantic Ocean heat contentLocally and Remotely Forced Subtropical AMOC Variability: A Matter of Time Scales, A hidden semi‐Markov model for characterizing regime shifts in ocean density variability, Journal of the Royal Statistical Society: Series C (Applied Statistics), The Mean State and Variability of the North Atlantic Circulation: A Perspective From Ocean Reanalyses, Limits on determining the skill of North Atlantic Ocean decadal predictions, Recent Progress in Understanding and Predicting Atlantic Decadal Climate Variability, A role of the Atlantic Ocean in predicting summer surface air temperature over North East Asia?,
By continuing to browse this site, you agree to its use of cookies as described in our Journal of Advances This is achieved by, for example, using the time‐averaged salinity in the seawater equation of state to give the density changes due to interannual temperature variability (for the given salinity mean state), Both GC2 and a longer simulation using a similar precursor model have been shown to have temperature‐dominated interannual density variability in the near‐surface Labrador Sea [To investigate whether the hindcasts maintain the correct dominant component of interannual density variability, we show the correlation in the hindcasts between In order to investigate the changing nature of density variability in the Labrador Sea in the DePreSys3 hindcasts, we compute the difference in magnitude of typical salinity‐induced and temperature‐induced density anomalies (Figure The inferred dominant component of density variability for a given region can change due to some combination of (1) changes in the mean state (i.e., moving into a regime in temperature/salinity space where a given temperature/salinity change has a weaker/stronger effect on the density [cf.
Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate ChangeThe alpha/beta ocean distinction: A perspective on freshwater fluxes, convection, nutrients and productivity in high‐latitude seasLong‐term climate change: Projections, commitments and irreversibilityClimate Change 2013: The Physical Science Basis. We investigate whether temperature or salinity dominate top 500 m interannual Labrador Sea density variability in gridded observations, an assimilation of the observations, and a set of multiannual hindcasts. We find that salinity dominates in the observations and assimilation. It becomes shallower, to less than 700 m (383 fathoms; 2,297 ft) towards Baffin Bay (see depth map) and passes into the 300 km (190 mi; 160 nmi) wide Davis Strait. Similarly, it is unclear whether the preference for one mode or another in a particular model represents a fundamental feature of the climate model, or whether the introduction of real‐world variability could shift the model to a more observationally consistent mode—as has been shown for situations in which salinity flux correction is applied [To explore these issues, we investigate the dominant components of Labrador Sea near‐surface (top 500 m) interannual density variability in observation and model‐based estimates of the real world. If you do not receive an email within 10 minutes, your email address may not be registered,
Considering first the middle column it is apparent that the change in temperature/salinity mean state in the hindcasts is not responsible for the shift from salinity‐dominated to temperature‐dominated density variability. We use optimally interpolated ocean observations of temperature and salinity from the “EN4” data set [The Met Office Decadal Prediction System 3 (DePreSys3) [Subsequently, hindcast simulations are performed, using the assimilation as the initial conditions and allowing the coupled system to evolve freely. In the hindcasts salinity remains dominant for the first year but from year three these revert to the same temperature dominance seen in the underlying climate model.