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| Titel |
Satellite Observations Reveal High Variability and a Decadal Trend in CO2 fluxes on the Scotian Shelf |
| VerfasserIn |
Elizabeth H. Shadwick, Helmuth Thomas, Adam Comeau, Susanne E. Craig, John J. Cullen, Christopher W. Hunt, Joseph E. Salisbury |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250031770
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| Zusammenfassung |
| The rise in atmospheric CO2, due to anthropogenic emissions, is partially offset by the
ocean’s CO2 uptake. Direct measurements of surface-ocean CO2 partial pressure
(pCO2) are required to accurately assess the seasonal and interannual variability of
air-sea CO2 fluxes. The coastal oceans have relatively large fluxes of CO2, but the
temporal variability of these systems is high. Compared to open ocean systems, the
variability of pCO2 in coastal regions remains poorly understood. We develop
an algorithm to compute pCO2 in the Scotian Shelf region (NW Atlantic) from
satellite-based estimates of chlorophyll-a concentration, sea-surface temperature,
and wind speed. This algorithm is based on a high-resolution time-series of pCO2
observations from an autonomous mooring. A hindcast of air-sea CO2 fluxes from 1999 to
2008 reveals significant variability both spatially and from year to year. Regional
conditions govern spatial and interannual variability on the Scotian Shelf, while
multi-annual trends appear to be correlated with the North Atlantic Oscillation. |
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