摘要
The dimensional and temporal distribution of Antarctic Intermediate Water(AAIW)and North Pacifi c Intermediate Water(NPIW)in the Philippine Sea were explored using Argo profi les and gridded Argo data.As the salinity minimum of intermediate water from mid-high latitude of the southern and northern hemisphere of the Pacifi c Ocean,the properties of AAIW and NPIW merge at about 10°N with diff erent properties in the Philippine Sea.The core of AAIW is located below 600 dbar with potential density of 27≤σθ≤27.3 kg/m 3 and salinity of 34.5≤S≤34.55.The core of NPIW is located between 300–700 dbar with potential density of 26.2≤σθ≤27 kg/m 3 and salinity of 34≤S≤34.4.The volume of AAIW and NPIW during January 2004 to December 2017 is negatively correlated.The time series of AAIW and NPIW is dominated by signifi cant periods of 6 and 8 months,respectively.The variations of AAIW and NPIW are mainly aff ected by volume transport through a 130°E section by the North Equatorial Current(NEC)and North Equatorial Undercurrent(NEUC).
基金
Supported by the National Key R&D Program of China(No.2016YFC1401702)
the National Program on Global Change and Air-Sea Interaction(No.GASI-IPOVAI-01-01)
the State Key Program of National Natural Science of China(No.41730534)
the NSFC Innovative Group Grant(No.41421005)
the NSFC-Shandong Joint Fund for Marine Science Research Centers(No.U1406401)
ZANG Nan and WANG Fan.Janet SPRINTALL was supported by NOAA’s Climate Program Offi ce,Climate Variability and Predictability Program(No.NA17OAR4310257)。
