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| Titel |
The OceanFlux Greenhouse Gases methodology for deriving a sea surface climatology of CO2 fugacity in support of air–sea gas flux studies |
| VerfasserIn |
L. M. Goddijn-Murphy, D. K. Woolf, P. E. Land, J. D. Shutler, C. Donlon |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 11, no. 4 ; Nr. 11, no. 4 (2015-07-08), S.519-541 |
| Datensatznummer |
250117262
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| Publikation (Nr.) |
 copernicus.org/os-11-519-2015.pdf |
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| Zusammenfassung |
| Climatologies, or long-term averages, of essential climate variables are
useful for evaluating models and providing a baseline for studying anomalies.
The Surface Ocean CO2 Atlas (SOCAT) has made millions of global underway
sea surface measurements of CO2 publicly available, all in a uniform
format and presented as fugacity, fCO2. As fCO2 is
highly sensitive to temperature, the measurements are only valid for the
instantaneous sea surface temperature (SST) that is measured concurrently
with the in-water CO2 measurement. To create a climatology of
fCO2 data suitable for calculating air–sea CO2 fluxes, it
is therefore desirable to calculate fCO2 valid for a more
consistent and averaged SST. This paper presents the OceanFlux Greenhouse
Gases methodology for creating such a climatology. We recomputed SOCAT's
fCO2 values for their respective measurement month and year
using monthly composite SST data on a 1° × 1° grid
from satellite Earth observation and then extrapolated the resulting
fCO2 values to reference year 2010. The data were then spatially
interpolated onto a 1° × 1° grid of the global
oceans to produce 12 monthly fCO2 distributions for 2010,
including the prediction errors of fCO2 produced by the spatial
interpolation technique. The partial pressure of CO2 (pCO2)
is also provided for those who prefer to use pCO2. The CO2
concentration difference between ocean and atmosphere is the thermodynamic
driving force of the air–sea CO2 flux, and hence the presented
fCO2 distributions can be used in air–sea gas flux calculations
together with climatologies of other climate variables. |
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