Heat in the Barents Sea: transport, storage, and surface fluxes 1Bjerknes Centre for Climate Research, Bergen, Norway
2Institute of Marine Research, Bergen, Norway
3Nansen Environmental and Remote Sensing Centre, Bergen, Norway
Received: 25 Jun 2009 – Published in Ocean Sci. Discuss.: 07 Jul 2009 Abstract. A column model is set up for the Barents Sea to explore sensitivity of surface
fluxes and heat storage from varying ocean heat transport. Mean monthly ocean
transport and atmospheric forcing are synthesised and force the
simulations. Results show that by using updated ocean transports of heat and
freshwater the vertical mean hydrographic seasonal cycle can be reproduced fairly well.
Revised: 25 Jan 2010 – Accepted: 02 Feb 2010 – Published: 11 Feb 2010
Our results indicate that the ~70 TW of heat transported to the
Barents Sea by ocean currents is lost in the southern Barents Sea as
latent, sensible, and long wave radiation, each contributing 23–39 TW to
the total heat loss. Solar radiation adds 26 TW in the south, as there
is no significant ice production.
The northern Barents Sea receives little ocean heat transport.
This leads to a mixed layer at the freezing point during winter and significant
ice production. There is little net surface heat loss annually in the north.
The balance is achieved by a heat loss through long wave radiation all year,
removing most of the summer solar heating.
During the last decade the Barents Sea has experienced an atmospheric
warming and an increased ocean heat transport. The Barents Sea responds
to such large changes by adjusting temperature and heat loss.
Decreasing the ocean heat transport below 50 TW
starts a transition towards Arctic conditions. The heat loss in the
Barents Sea depend on the effective area for cooling, and an increased
heat transport leads to a spreading of warm water further north.
Citation: Smedsrud, L. H., Ingvaldsen, R., Nilsen, J. E. Ø., and Skagseth, Ø.: Heat in the Barents Sea: transport, storage, and surface fluxes, Ocean Sci., 6, 219-234, doi:10.5194/os-6-219-2010, 2010.