caa a22 4500 605546401 CHVBK 20210128100940.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10236-014-0792-8 doi (NATIONALLICENCE)springer-10.1007/s10236-014-0792-8 Seasonal and inter-annual variability of western subtropical mode water in the South Pacific Ocean [Elektronische Daten] [Xiao Wang, Vihang Bhatt, Youn-Jong Sun] The seasonal and inter-annual variability of the western subtropical mode water (hereafter STMW) in the South Pacific Ocean was examined using the Bluelink ReANalysis 2.1 (BRAN2.1) in terms of heat budget. The analysis of heat content change suggested that the seasonal cycle of surface heat flux played a dominant role in the formation of the STMW in the South Pacific Ocean. However, the surface heat flux and the East Australian Current (EAC) heat transport tended to compensate one another during STMW production. Out of phase or different amplitude of the components led to warming or cooling of the mixed layer, and the heat transport by the EAC in the formation of the STMW cannot be ignored. The correlation between volume anomalies of the STMW and net surface heat flux was insignificant, indicating that the inter-annual variability of the STMW was equally influenced by surface thermal forcing and ocean dynamic processes, such as horizontal advection. This study revealed the important role played by the EAC in the inter-annual variability of the STMW, i.e., a weakened heat transport by the EAC led to an increased volume anomaly of the STMW in the South Pacific Ocean. The STMW production can be further enhanced by La Nina, which drives positive anomaly in sea surface salinity in the western South Pacific and creates a favourable preconditioning for surface cooling in austral winter. Springer-Verlag Berlin Heidelberg, 2014 Subtropical mode water nationallicence East Australian Current nationallicence Bluelink reanalysis nationallicence Seasonal variability nationallicence Inter-annual variability nationallicence Numerical modeling nationallicence Wang Xiao School of Physical Environmental Mathematical Sciences, UNSW Canberra at ADFA, ACT 2600, Canberra, Australia aut Bhatt Vihang Now at Institute for Coastal Research, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany aut Sun Youn-Jong School of Physical Environmental Mathematical Sciences, UNSW Canberra at ADFA, ACT 2600, Canberra, Australia aut Ocean Dynamics Springer Berlin Heidelberg 65/1(2015-01-01), 143-154 1616-7341 65:1<143 2015 65 10236 https://doi.org/10.1007/s10236-014-0792-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10236-014-0792-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Xiao School of Physical Environmental Mathematical Sciences, UNSW Canberra at ADFA, ACT 2600, Canberra, Australia aut NATIONALLICENCE 700 1- Bhatt Vihang Now at Institute for Coastal Research, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany aut NATIONALLICENCE 700 1- Sun Youn-Jong School of Physical Environmental Mathematical Sciences, UNSW Canberra at ADFA, ACT 2600, Canberra, Australia aut NATIONALLICENCE 773 0- Ocean Dynamics Springer Berlin Heidelberg 65/1(2015-01-01), 143-154 1616-7341 65:1<143 2015 65 10236