Open AccessModeling the evolution of the Arctic mixed layer during the fall 1997 Surface Heat Budget of the Arctic Ocean (SHEBA) Project using measurements of 7 Be
Author(s) -
Kadko David
Publication year - 2000
Publication title -
journal of geophysical research: oceans
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1999jc900311
Subject(s) - arctic , mixed layer , climatology , environmental science , arctic ice pack , lead (geology) , geology , the arctic , atmospheric sciences , oceanography , geomorphology
During the Surface Heat Budget of the Arctic Ocean (SHEBA) project in October 1997 the first measurements of 7 Be ever made within the Arctic Ocean were used to reconstruct the evolution of the mixed layer over the previous season and confirmed that the reservoir of heat beneath the fall mixed layer was emplaced in the summer, rather than input cumulatively over several seasons or advected in from distant sources. As suggested by McPhee et al. [1998], several times as much heat was emplaced at SHEBA than at Arctic Ice Dynamics Joint Experiment 20 years earlier. A likely mechanism for this would be substantially greater lead opening coupled with the positive feedback loop between increased open water, increased heat absorption, and further ice melting. In addition, a rate of net primary production ≥13 gC m −2 for the preceding spring‐summer period was derived using this mixed layer history with an oxygen profile from the fall.