In:
Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 105, No. C2 ( 2000-02-15), p. 3465-3481
Kurzfassung:
A main objective is to simulate the seasonal variations in a carbon cycle during the mixed layer development from a fall through winer over the northern North Pacific. A bulk mixed layer model is employed, which is initialized with the historical data and forced by the observed atmospheric data. The model retains the following mechanisms: cooling and freshwater flux through the sea surface, kinetic energy input due to wind stresses, and air‐sea CO 2 flux as well as turbulent vertical mixing of heat, salt, total CO 2 , and carbonate alkalinity at the bottom of the mixed layer. Total CO 2 , carbonate alkalinity, and p CO 2 are related to each other under the assumption of chemical equilibrium. Since biological processes are secondary for the p CO 2 evolution during winter, they are omitted. The evolution of p CO 2 in the model mixed layer shows a rapid increase of p CO 2 in the subpolar region due to mixing of deep water rich in CO 2 before exceeding the atmospheric p CO 2 , and then the CO 2 flux stays almost constant during the winter. In the subtropical region the CO 2 is transported always from the atmosphere to the ocean, as the p CO 2 decreases from cooling. The ocean is a CO 2 sink (−0.18 GtC half‐year −1 ) over the entire model domain north of 30°N. However, in the subpolar region the ocean is a CO 2 source (0.04 GtC half‐year −1 ). The CO 2 flux varies from year to year, while there is no qualitative difference in the flux distribution.
Materialart:
Online-Ressource
ISSN:
0148-0227
DOI:
10.1029/1999JC900302
Sprache:
Englisch
Verlag:
American Geophysical Union (AGU)
Publikationsdatum:
2000
ZDB Id:
2033040-6
ZDB Id:
3094104-0
ZDB Id:
2130824-X
ZDB Id:
2016813-5
ZDB Id:
2016810-X
ZDB Id:
2403298-0
ZDB Id:
2016800-7
ZDB Id:
161666-3
ZDB Id:
161667-5
ZDB Id:
2969341-X
ZDB Id:
161665-1
ZDB Id:
3094268-8
ZDB Id:
710256-2
ZDB Id:
2016804-4
ZDB Id:
3094181-7
ZDB Id:
3094219-6
ZDB Id:
3094167-2
ZDB Id:
2220777-6
ZDB Id:
3094197-0
SSG:
16,13
Permalink