 |
| Titel |
Consistency of the current global ocean observing systems from an Argo perspective |
| VerfasserIn |
K. von Schuckmann, J.-B. Sallée, D. Chambers, P.-Y. Le Traon, C. Cabanes, F. Gaillard, S. Speich, M. Hamon |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1812-0784
|
| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 10, no. 3 ; Nr. 10, no. 3 (2014-06-24), S.547-557 |
| Datensatznummer |
250117008
|
| Publikation (Nr.) |
 copernicus.org/os-10-547-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Variations in the world's ocean heat storage and its associated volume
changes are a key factor to gauge global warming and to assess the earth's
energy and sea level budget. Estimating global ocean heat content (GOHC) and
global steric sea level (GSSL) with temperature/salinity data from the Argo
network reveals a positive change of 0.5 ± 0.1 W m−2 (applied to
the surface area of the ocean) and 0.5 ± 0.1 mm year−1 during
the years 2005 to 2012, averaged between 60° S and 60° N
and the 10–1500 m depth layer. In this study, we present an intercomparison
of three global ocean observing systems: the Argo network, satellite
gravimetry from GRACE and satellite altimetry. Their consistency is
investigated from an Argo perspective at global and regional scales during
the period 2005–2010. Although we can close the recent global ocean sea
level budget within uncertainties, sampling inconsistencies need to be
corrected for an accurate global budget due to systematic biases in GOHC and
GSSL in the Tropical Ocean. Our findings show that the area around the
Tropical Asian Archipelago (TAA) is important to closing the global sea level
budget on interannual to decadal timescales, pointing out that the steric
estimate from Argo is biased low, as the current mapping methods are
insufficient to recover the steric signal in the TAA region. Both the large
regional variability and the uncertainties in the current observing system
prevent us from extracting indirect information regarding deep-ocean changes.
This emphasizes the importance of continuing sustained effort in measuring
the deep ocean from ship platforms and by beginning a much needed automated
deep-Argo network. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|