Mass, Heat and Salt Balances in the Eastern Barents Sea Obtained by Inversion of Hydrographic Section Data |
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| Authors: | Gleb Panteleev Motoyoshi Ikeda Alex Grotov Dmitri Nechaev Max Yaremchuk |
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| Institution: | (1) International Arctic Research Center-Frontier Research System for Global Change, University of Alaska Fairbanks, Fairbanks, AK, 99775-7335, U.S.A.;(2) Shirshov Institute of Oceanology, Nakhimovsky Prospect 36, Moscow, 117218, Russia;(3) University of Southern Mississippi, Stennis Space Center, MS, 39529, U.S.A;(4) International Pacific Research Center, University of Hawaii, Honolulu, HI, 96822, U.S.A |
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| Abstract: | Standard hydrological section data, collected in the eastern Barents Sea in September 1997, have been analyzed using a variational
data assimilation technique. This method allows us to obtain temperature, salinity and velocity fields that are consistent
with observations and dynamically balanced within the framework of a steady-state model describing large-scale nearly geostrophic
circulation. Error bars of the optimized fields are computed by explicit inversion of the Hessian matrix. The optimized velocity
field is in agreement with independent velocity observations derived from surface drifter trajectories in the southwestern
part of the Barents Sea. Optimized fields provide the following estimates of integral characteristics of the circulation in
the region: i) the North Cape current transport is 2.12 ± 0.25 Sv; ii) the Karskie Vorota Strait throughflow is 0.7 ± 0.06
Sv; iii) heat flux with Atlantic water is 4.7 ± 0.16⋅1011 W; iv) salt import from the Atlantic Ocean is 7.41 ± 0.46⋅103 kg/s. The imbalance of the heat budget in the eastern part of the Barents Sea indicates the presence of statistically insignificant
surface heat fluxes which are less than 1 W/m2.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Barents Sea circulation data assimilation Arctic Ocean |
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