The Structure and Long-Term Variability of the Bottom Layer in the Irminger Sea

This paper shows the important role that circulation can play in the long-term variability of thermohaline properties of the bottom layer in the Irminger Sea, and the increase in salinity in the 21st century in spite of intense ice melting in the Arctic and freshening of the upper and intermediate layers that started over the last 5–7 years in the North Atlantic.     

Structure and Variability of the Meridional Overturning Circulation in the North Atlantic Subpolar Gyre, 2007–2017

Doklady Earth Sciences - The vertical structure and interannual and long-term variability of the meridional overturning circulation in the North Atlantic Subpolar Gyre is analyzed. A close...     

The Role of Salinity in the Global Distribution of Surface Density Fluxes in the World Ocean Based on the Example of 2014

Oceanology - We have analyzed the dependence of the calculated magnitudes of buoyancy fluxes at the ocean surface on the various sources of information used about salinity based on the example of...     

Comparison of Field and Satellite Data on the Total Cloudiness for the Atlantic Ocean in the Period 2004–2014

Oceanology - The aim of this study is to compare satellite measurements of the total cloudiness with visual observations of clouds. This makes it possible to compare “different...     

Evaluation of the impact of oceanic heat transport in the North Atlantic and Barents sea on the Northern Hemispheric climate

In this work, we evaluate the impact of terminated oceanic heat flux in the North Atlantic and Barents Sea on the Northern Hemisphere climate in January by numerical experiments with a coupled model of atmospheric general circulation and a thermodynamic model of the upper mixed layer of the ocean. We analyze the variations in the atmospheric circulation and near-surface temperature. We found that the termi-nation of the oceanic heat flux leads to a depression in atmospheric centers of action in the Northern Hemi-sphere (by 3?C5 hPa) and a significant cooling over the continents with the strongest temperature decrease down to ?10°C in northwestern Eurasia.     

Characteristics of the variability of the surface temperature in the Atlantic Ocean on various spatial-temporal scales

The behaviour of various characteristics of the temperature variability such as gradients and dispersions versus the scales of spatial and temporal averaging is studied on the basis of data contained in the facsimile charts of the sea surface temperature (SST). The approximating relationships which permit us to establish the connection between these characteristics on various spatial-temporal scales are developed for the characteristics of the SST variability. A correspondence between the scales of spatial-temporal averaging which results in identical variations of the gradients and the spatial-temporal dispersions of the SST field is revealed.Translated by Mikhail M. Trufanov.     

The North Atlantic High-Resolution Regional Climate Model Experiment for Oceanic and Atmospheric Applications

We present a high-resolution historical analysis of the atmosphere over the North Atlantic for the period from January 1979 to December 2018. The dataset was obtained using the nonhydrostatic atmospheric model WRF-ARW version 3.8.1 and contains two experiments that differ in spatial resolution: 14 km (HiRes) and 77 km (LoRes). Except for the spatial resolution, the configuration remained identical in both experiments: 50 vertical sigma-levels (starting from ~12 m up to 50 hPa); ERA-Interim reanalysis was used as forcing and spectral nudging. The dataset for HiRes and LoRes experiments was named NAAD (North Atlantic Atmospheric Downscaling). Preliminary results of both HiRes and LoRes reveal good agreement with observations and the ERA-Interim, ERA5, and ASRv2 reanalyses. The NAAD dataset is available online at http://www.naad.ocean.ru and provides a variety of surface and upper-troposphere atmospheric variables with a time step of 3 h.

     

On the sensitivity of balance computations of the meridional heat transport to estimations of separate parameters

The response of balance estimates for the meridional heat fluxes in the North Atlantic to methods of calculating the boundary condition in the north as well as the effects of spatial-temporal averaging of hydrometeorological information is analysed. It is shown that spatial-temporal averaging of parameters during calculation of the surface heat fluxes can not only affect the characteristics of the meridional heat flux variability, but also significantly alter the average values.Translated by Mikhail M. Trufanov.