The Argo Float Data Influence on Oceanic Data Assimilation System
of Tropic Pacific Ocean
International Center for Climate and Environment Sciences (ICCES)
Institute of Atmospheric Physics(IAP.CAS) ,100029 Beijing
Abstract: Temperature and salinity is one of the basic attributes of water mass, in Tropic Pacific Ocean, to understand the heat budget of West Pacific Warm Pool and ENSO prediction, its space distribution and time variability are very important. Previously we always estimate the space-time distribution of oceanic salinity, assist by some mediate approaches, because the oceanic salinity observation data is so sparse in history. Recent years with the invention of the Argo Float, in-situ temperature and salinity survey data increasing, so observe the space-time distribution of oceanic temperature and salinity become possible. Especially the salinity data provide by Argo Float is the other systems can not or hardly provide. So the Argo data research can exert what influence on Oceanic Data Assimilation is very significant. In this report Oceanic Data Assimilation System of Tropic Pacific Ocean which belong to the Institute of Atmospheric Physics (IAP.CAS) added the seawater temperature and salinity vertical profiling data into other Tropic Pacific Ocean temperature data (include Ship information, TAO array ) for three years Assimilation Experiment, and compared with the result that did not add the Argo Float data. It indicated that Argo Float temperature data did not make much improve to Oceanic Temperature Data Assimilation, the prime reason is the existing Oceanic Temperature Data far exceeded the Argo Float temperature data. Adding of the Argo Float salinity data made a great improve on the Salinity Field structure, effectively adjusted the Salinity Field different from the Climatology Salinity Field.