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Titel |
An estimate of anthropogenic carbon into the north east Atlantic between Scotland and Iceland |
VerfasserIn |
V. M. C. Rérolle, M. Esposito, S. E. Hartman, D. J. Hydes, E. P. Achterberg |
Konferenz |
EGU General Assembly 2012
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 14 (2012) |
Datensatznummer |
250063588
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Zusammenfassung |
The uptake of anthropogenic CO2 by the oceans since the industrial revolution is
considered to have considerably buffered atmospheric CO2 increases and thereby slow
global climate change. However, the CO2 uptake is reducing the ocean’s capacity
to absorb future atmospheric CO2 which may lead to more pronounced climate
forcings.
We investigated the accumulation of anthropogenic carbon in the Atlantic Ocean on a
section between Scotland and Iceland, as part of the UK climate monitoring strategy. This
part of the North Atlantic represents an important carbon sink and hence plays a key role in
moderating the climate. Repeat sampling on this section known as the “Extended Ellet Line
-EEL” has be carried out on three recent cruises in 2009, 2010 and 2011 for work on the
carbonate system.
The most detailed dissolved inorganic carbon and alkalinity measurements from RRS
Discovery cruise D365 in 2011 are used to determine the distribution of anthropogenic
carbon along the EEL section. Two different approaches are used to estimate the
anthropogenic carbon concentration: a back calculation technique (ΔC*) and the extended
multiple linear regression method with data from the CARINA dataset. The aim is to
describe the anthropogenic carbon distribution for the region by comparing the two
methods of calculation approaches and relate it to the water masses. The impacts of
large-scale atmospheric forcings such as the North Atlantic Oscillation and the
Atlantic Multidecadal Variability on the carbon uptake rate are also considered. |
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