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| Titel |
Inorganic carbon time series at Ocean Weather Station M in the Norwegian Sea |
| VerfasserIn |
I. Skjelvan, E. Falck, F. Rey, S. B. Kringstad |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 5, no. 2 ; Nr. 5, no. 2 (2008-04-10), S.549-560 |
| Datensatznummer |
250002385
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| Publikation (Nr.) |
 copernicus.org/bg-5-549-2008.pdf |
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| Zusammenfassung |
| Dissolved inorganic carbon (CT) has been collected at Ocean Weather
Station M (OWSM) in the Norwegian Sea since 2001. Seasonal variations in
(CT) are confined to the upper 50 m, where the biology is active, and
below this layer no clear seasonal signal is seen. From winter to summer the
surface (CT) concentration typical drop from 2140 to about 2040 μmol
kg−1, while a deep water (CT) concentration of about 2163 μmol
kg−1 is measured throughout the year. Observations show an annual
increase in salinity normalized carbon concentration
(nCT) of 1.3±0.7 μmol kg−1 yr−1 in the surface layer, which is equivalent
to a pCO2 increase of 2.6±1.2 μatm yr−1, i.e. larger than
the atmospheric increase in this area (2.1±0.2 μatm yr-1).
Observations also show an annual increase in the deep water nCT
of 0.57±0.24 μmol kg−1 yr−1, of which about 15% is due to
inflow of old Arctic water with larger amounts of remineralised matter. The
remaining part has an anthropogenic origin and sources for this might be
Greenland Sea surface water, Iceland Sea surface water, and/or recirculated
Atlantic Water. By using an extended multi linear regression method (eMLR)
it is verified that anthropogenic carbon has entered the whole water column
at OWSM. |
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