Decadal variation of the North Atlantic meridional heat transport and its relation to atmospheric processes

Details Decadal variation of the North Atlantic meridional heat transport and its relation to atmospheric processes Decadal variation of the North Atlantic meridional heat transport and its relation to atmospheric processes

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3404703m&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 4, CiteID L04703

Physics

2

Atmospheric Composition And Structure: Middle Atmosphere: Energy Deposition (3334), Atmospheric Processes: General Circulation (1223), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504)

Scientific paper

The effects of the meridional heat transport in the North Atlantic Ocean (HTR) on the north hemispheric climate are studied using the results of the coupled model ECHAM5/MPI-OM. Significant correlations exist between HTR and atmospheric processes over the Nordic Seas and the Eurasian continent only for low (periods longer than 40 years) and intermediate frequency variations (periods between 25 and 40 years). A positive HTR anomaly at 30°N is highly correlated with turbulent heat fluxes around 50°N. The transport through 70°N is directly related to the fluxes over the Nordic seas. From the correlation pattern with the atmospheric surface temperature and pressure one can conclude that the heat anomalies propagate along the cyclone tracks towards northeast over the Eurasian continent. The HRT anomalies are negatively correlated with the pressure over the Nordic seas and with the winter time anticyclone intensity over Siberia.

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