HR: 1340h
AN: OS13A-1019    [Abstracts]
TI: Global Hydrographic Overview of Ocean Near Surface Variability
AU: * von Schuckmann, K
EM: karina.von.schuckmann@ifremer.fr
AF: Karina von Schuckmann, BP 70, Plouzane, 29280, France
AU: Gaillard, F
EM: Fabienne.Gaillard@ifremer.fr
AU: Le Traon, P
EM: Pierre.Yves.Le.Traon@ifremer.fr
AB: Estimates of hydrographic variability as measured by ARGO drifters in the near surface layer of the world ocean are discussed here. A gridded global field of these hydrographic measurements is used which is disposed by the CORIOLIS Analysis System (CAS). The estimates explicitly include the description of the seasonal cycle of temperature as well as of the salinity field, depict large-scale variability patterns in the different oceanic basins and its main purpose is to provide an insight into what can be measured and resolved in the upper layer while using the CAS gridded field. Amplitudes of total variance are generally higher in the northern hemisphere compared to its southern counterpart. The distribution of standard deviations of temperature including the seasonal cycle as well as from temperature anomalies highly differs from corresponding salinity variability which can be predominantly lead back to ocean atmosphere dynamics. Large-scale and well known oceanic features such as ocean's response to NAO and PDO fluctuations and ENSO dynamics can be resolved in CAS temperatures. A substantial advance using the CAS gridded field is that its signatures in global salinity can also be discussed.
DE: 4536 Hydrography and tracers
SC: Ocean Sciences [OS]
MN: 2007 Fall Meeting