Argo-Based Study of Water, Heat, and Salt Exchange Between Atlantic, Nordic Seas, and Arctic Ocean

The interannual variability of the mass transports through the Denmark and Fram Straits, and through the sections separating the Nordic Seas from the Atlantic Ocean and Barents Sea is studied on the base of numerical simulations performed with the use of the Argobased Model for Investigation of the Global Ocean (AMIGO). The model consists of a block for variational interpolation to a regular grid of Argo floats data and a block for model hydrodynamic adjustment of variationally interpolated fields. Additional numerical experiments were carried out in order to study the contribution of the wind forcing to the interannual variability of the transports: the real thermohaline fields corresponding to the particular time period were replaced by climatic ones (1) and by replacing the real wind forcing data with the climatic ones (2). Analysis of the numerical experiments results has shown that the variable wind stress forcing is the key factor determining the interannual variability of the water exchange between Atlantic, Nordic Seas, and Arctic Ocean.

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The Model Study of the Water Exchange Interannual Variability Between Atlantic, Nordic Seas, and Arctic Ocean

Lebedev

Filyushkin

Shchepetkin

2020

JOR

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The role of Regional Atmospheric Circulation in Interannual Variability of the Ocean Heat Advection in the Nordic Seas

Iakovleva,

Bashmachnikov

2023

Izvestiâ Akademii nauk SSSR. Fizika atmosfery i okeana

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More than 90% of oceanic heat enters the Arctic Ocean with the Norwegian Current. In this paper we examine the mechanisms of variability of the oceanic heat flux in the Norwegian Current (across the Svinoy section in the southern Norwegian Sea) in 1993–2019. GLORYS oceanic reanalysis with a spatial resolution of 1/12° is used. It is found that the variability of oceanic heat flux is associated with that of water transport, which, in turn, is associated with variability of the sea level gradient across the Norwegian Current. It is shown that an increase in water transport of the Norwegian Current is a result of a decrease of the atmospheric pressure over the central part of the Norwegian Sea. The latter intensifies the southwesterly winds along the Scandinavian Peninsula. The sea level gradients across the Norwegian Current, formed by the winds, are primarily associated with Ekman pumping towards the coast, as well as with the wind stress curl. Both have a significant impact on the variability of water transport through the section. Another factor is variability of the steric sea level gradient, which significantly affects the water transport during the period of a rapid temperature rise of in the Norwegian Current (1995–2005).

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Argo-Based Study of Water, Heat, and Salt Exchange Between Atlantic, Nordic Seas, and Arctic Ocean

Cited by 2 publications

References 28 publications

The Model Study of the Water Exchange Interannual Variability Between Atlantic, Nordic Seas, and Arctic Ocean

The Model Study of the Water Exchange Interannual Variability Between Atlantic, Nordic Seas, and Arctic Ocean

The role of Regional Atmospheric Circulation in Interannual Variability of the Ocean Heat Advection in the Nordic Seas

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