M. Visbeck - Academia.edu (original) (raw)

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Silke Beck

Helmholtz Centre for Environment Research UFZ

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Papers by M. Visbeck

The pattern and temporal evolution of decadal variability in North Atlantic SST are examined usin... more The pattern and temporal evolution of decadal variability in North Atlantic SST are examined using observations from 1870 to the present. Particular attention is given to the correlation between SST variability in the subpolar gyre (hereafter SP) and in the subtropical gyre region (hereafter ST) and their relationship to the NAO. We find that on decadal time scales there is

Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society, 2010

The aim of this community white paper is to make recommendations for a glider component of a glob... more The aim of this community white paper is to make recommendations for a glider component of a global ocean observing system. We first recommend the adoption of an Argo-like data system for gliders. Then, we argue that combining glider deployments with the other components (ships, moorings, floats and satellites) will considerably enhance our capacity for observing the ocean by filling gaps left by the other observing systems. Gliders could be deployed to sample most of the western and eastern boundary circulations and the regional seas (around 20 basins in the world) which are not well covered by the present global ocean observing system and in the vicinity of fixed point time series stations. These plans already involve people scattered around the world in Australia, and the USA, and will certainly expand to many other countries. A rough estimate of resources required is about 13M$/Euro for ~20+ gliders permanently at sea during five years in the world ocean, based on present scientific infrastructures.

Journal of Geophysical Research, 2011

In this study a coupled ocean-atmosphere model containing interactive marine biogeochemistry is u... more In this study a coupled ocean-atmosphere model containing interactive marine biogeochemistry is used to analyze interannual, lagged, and decadal marine biogeochemical responses to the North Atlantic Oscillation (NAO), the dominant mode of ...

Geophysical Research Letters, 1998

The response of the Atlantic Ocean to North Atlantic Oscillation (NAO)-like wind forcing has been... more The response of the Atlantic Ocean to North Atlantic Oscillation (NAO)-like wind forcing has been investigated using an ocean-only general circulation model coupled to an atmospheric boundary layer model. A series of idealized experiments was performed to investigate the interannual to multi-decadal frequency response of the ocean to a winter wind anomaly pattern. South of 30 N, the sea surface temperature (SST) response of the model was almost exactly in phase with the forcing and largely independent of the forcing frequency suggesting that the subtropical ocean response to the overlying atmosphere is fast and direct. Poleward of 30 N and in particular in the Gulf stream extension region strong SST anomalies lagged the forcing by several years. They were sustained by deep reaching temperature anomalies which were then re-exposed to the atmosphere during the winter season. Overall the strength of the SST response increased slightly with longer forcing periods. In the subpolar gyre, however, the model showed a broad response maximum in the decadal band (12-16 years). The implications for the existence of a decadal coupled mode are discussed.

The pattern and temporal evolution of decadal variability in North Atlantic SST are examined usin... more The pattern and temporal evolution of decadal variability in North Atlantic SST are examined using observations from 1870 to the present. Particular attention is given to the correlation between SST variability in the subpolar gyre (hereafter SP) and in the subtropical gyre region (hereafter ST) and their relationship to the NAO. We find that on decadal time scales there is

Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society, 2010

The aim of this community white paper is to make recommendations for a glider component of a glob... more The aim of this community white paper is to make recommendations for a glider component of a global ocean observing system. We first recommend the adoption of an Argo-like data system for gliders. Then, we argue that combining glider deployments with the other components (ships, moorings, floats and satellites) will considerably enhance our capacity for observing the ocean by filling gaps left by the other observing systems. Gliders could be deployed to sample most of the western and eastern boundary circulations and the regional seas (around 20 basins in the world) which are not well covered by the present global ocean observing system and in the vicinity of fixed point time series stations. These plans already involve people scattered around the world in Australia, and the USA, and will certainly expand to many other countries. A rough estimate of resources required is about 13M$/Euro for ~20+ gliders permanently at sea during five years in the world ocean, based on present scientific infrastructures.

Journal of Geophysical Research, 2011

In this study a coupled ocean-atmosphere model containing interactive marine biogeochemistry is u... more In this study a coupled ocean-atmosphere model containing interactive marine biogeochemistry is used to analyze interannual, lagged, and decadal marine biogeochemical responses to the North Atlantic Oscillation (NAO), the dominant mode of ...

Geophysical Research Letters, 1998

The response of the Atlantic Ocean to North Atlantic Oscillation (NAO)-like wind forcing has been... more The response of the Atlantic Ocean to North Atlantic Oscillation (NAO)-like wind forcing has been investigated using an ocean-only general circulation model coupled to an atmospheric boundary layer model. A series of idealized experiments was performed to investigate the interannual to multi-decadal frequency response of the ocean to a winter wind anomaly pattern. South of 30 N, the sea surface temperature (SST) response of the model was almost exactly in phase with the forcing and largely independent of the forcing frequency suggesting that the subtropical ocean response to the overlying atmosphere is fast and direct. Poleward of 30 N and in particular in the Gulf stream extension region strong SST anomalies lagged the forcing by several years. They were sustained by deep reaching temperature anomalies which were then re-exposed to the atmosphere during the winter season. Overall the strength of the SST response increased slightly with longer forcing periods. In the subpolar gyre, however, the model showed a broad response maximum in the decadal band (12-16 years). The implications for the existence of a decadal coupled mode are discussed.

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