 |
| Titel |
Long-term trend of CO2 and ocean acidification in the surface water of the Ulleung Basin, the East/Japan Sea inferred from the underway observational data |
| VerfasserIn |
J.-Y. Kim, D.-J. Kang, T. Lee, K.-R. Kim |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 9 ; Nr. 11, no. 9 (2014-05-05), S.2443-2454 |
| Datensatznummer |
250117392
|
| Publikation (Nr.) |
 copernicus.org/bg-11-2443-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Anthropogenic carbon is responsible for both global warming and ocean
acidification. Efforts are underway to understand the role of ocean in a high
CO2 world on a global context. However, marginal seas received little
attention despite their significant contribution to biogeochemical cycles.
Here we report the CO2 increase and ocean acidification in the surface
waters of the Ulleung Basin (UB) of the East/Japan Sea, and possible causes
are discussed. Fourteen observations of surface fCO2 were made in the
period from 1995 to 2009. The contribution of temperature variation to the
seasonality of fCO2 was almost equivalent to the non-thermal effect in
the UB. However, the difference of relative contribution with the season
makes two seasonal peaks of fCO2 in the surface water of the UB.
Non-thermal effect contributed to the surface fCO2 drawdown in summer,
whereas the surface fCO2 elevation in winter. The decadal trend of
fCO2 increment was estimated by harmonic analysis. The estimated rates
of increase of fCO2 were 1.8 ± 0.4 μatm yr−1 for
the atmosphere and 2.7 ± 1.1 μatm yr−1 for the surface
water. The ocean acidification trend, calculated from total alkalinity and
fCO2, was estimated to be −0.03 ± 0.02 pH units decade−1.
These rates seem to be higher than observations at most other ocean
time-series sites during the same period of time. Sustained observations are
required to understand more accurate trend in this area. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|