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1 45 6 Vol.45, No OCEANOLOGIA ET LIMNOLOGIA SINICA Nov., 2014 * 1, 2, 3 1, 2 1, 2 1, 2 ( ; ; ) PN, NCEP,, (PDO),, 19 33Sv, 24.30Sv(1Sv=10 6 m 3 /s);, Sv 9.86Sv 9.38Sv,, PDO ; ; ; ; P731 doi: /hyhz ,,,,,,,,,, (, 1996),, 20 80,, (1982) ,, Yuan (1994) ,, Ichikawa (1993), (1998, 1999, 2000), ,,, 1995,,,, (1981), 3a 8 9a, Saiki(1982), 8a 5.5a, (1994), 1.8a 8a (, 1996;, 1999), (2008) Zhang (2012),, 1976, *, KZCX2-EW-209 ; A, XDA , XDA ; ( ), GASI ,, qijifeng80@163.com :,,, bsyin@qdio.ac.cn : , :

2 ,,,,, PN NCEP,, PDO, 1 (1981) PN ( 1), hpa PN ( 1), ( N, E, N, E, 37 ),,,, 1 PN, Fig.1 The location of the PN section (NCEP), 17 (1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10hPa), , , : 90 N 90 S, 0 E E (0 N 50 N, 100 E 180 E)850hPa (PDO) PDO 20 N SST (EOF), SST SST, (SLP), PDO, PDO, PDO, PDO,,, PDO 2, , ( ) 24.30Sv(1Sv=10 6 m 3 /s), 3.58Sv,, Yuan (1994), 2,, 19 33Sv, 27 28Sv, , 1, 30.83Sv, 2005, 16.56Sv, 1957,, 35.10Sv(2002 ),, 33.70Sv(2005 ),, 33.10Sv, ;, 6.70Sv(1974 ),, 11.87Sv(1968 ),, 20.20Sv 18.30Sv, ,,, 14.27Sv,,, 28.40Sv,,, 21.83Sv,, 14.80Sv 12.90Sv

3 6 : 1143 表 1 PN 断 面 黑 潮 流 量 ( 单 位 : Sv) Table 1 Kuroshio volume transport on the PN section (in Sv) Fig.2 The frequency distribution of the Kuroshio volume transport (KVT) through section PN during ,, 3.1 3a ( ),, 1976,, 1976 ; 6.53Sv, 2005, 7.74Sv, 1957, 14.27Sv, (σ=3.58), (σ=3.58), 1981, 1986, 1988, 2000, 2001, 2002, , 1956, 1957, 1963, 1964, 1967, 1968, 1969, , 1976, 3 ( ) ( ) Fig.3 Inter-annual (solid line) and inter-decadal variations (bashed line) of the KVT anomalies 1976, 1976, : 5.3a 24.9a 3.6a, 3 5a, 25a, Saiki, 3 5a, ENSO (, 2008) 3.2 3b c,, 10.37Sv, 2002, 18.03Sv, 1974, 28.40Sv; 8.76Sv, 13.04Sv, , 21.80Sv,,

4 a 20a 3.5a, 14.7a 3a 5.1a,,, 2a 3.5a, 3a 5a,,, 1959, , ; , , ( ) 4,, ,, 20 70,, ; 70,, 25a, 20 70, t (, 1998),, 1976 t 5.770, 0.01 (2.878), ,, 3.0Sv, ,, 2.17Sv SST (, 2002;, 2004), 3,,,, 20a,, 14.7a, ;,, 1976,, 1970, 4.2,,,, t (, 1998), : f () t c0 c1t c2t c3t c4t (1) 1/2 1 1/2 2 t ct 5 ct 6 ct 7 ct 8 ce 9 c10ln t, t, 1956, t =1, 2, 3,, 50; c 0 c 10 (1),,, : : f ( t) t (2) : f ( t) t (3) : f ( t) t (4) (2) (4),, 50 4 ( 4 ( ) Fig.4 The inter-annual variations (solid line) and long-term trend (dash line) of the KVT in the East China Sea

5 6 : 1145, ), 20 50, , 8.73Sv 9.86Sv 9.38Sv,,, 5,, (1982),,, ; (1992),,, (2008),, (20 N 28 N, 150 E 130 W),,, 5.1,, 850hPa, 6 ( 5a),, 0.40,, 0.60( 99% ) 5b 12,, 0.36( 99% ) (1982),,, 6, 6, 5 a. 6 ; b. 12 Fig.5 Distribution of correlation coefficients between the KVT and meridional wind anomaly fields: a: summer KVT and meridional wind anomaly in June; b: winter KVT and meridional wind anomaly in December of the previous year 6 (a) (b) a. 6 ; b. 12 Fig.6 Distributions of meridional wind anomalies in stronger KVT years (a: in June) and weaker KVT years (b: in December)

6 ( ), ( 4m/s) ( 6a); 12, ( ), ( 3m/s) ( 6b),,,, ;,,,,, ( ),,,, (1982) (1992) 5.2 (2008), (PDO), PDO, PDO, (2 )PDO, 0.45, , 99% ; (3 )PDO 0.35, , 99% 7 (2 ) (3 )PDO 7a 3b, PDO, PDO ( 7b) ( 3c), PDO, PN, NCEP,, 7 PDO ( ) (, 5 ) Fig.7 The inter-annual (solid line) and inter-decadal variations (bashed line) of the Pacific Decadal Oscillation index in winter and summer, (1), 19 33Sv, 24.30Sv (25.91Sv) (24.27Sv),,, (2) 3 5 a, 2.7a 3.5a, 3a 5.1a, 6, 12 (3), 1976,,, PDO, PDO (4) 20 50, , 8.73Sv 9.86Sv 9.38Sv,,,

7 6 : 1147,, :, 18 50,, , 18(4): ,, , 20(6): 1 11,, , 21(3): 15 29,, , 22( ): 39 51,,, , 25(6): , :, 42 45, , 1: 26 29,,, , 26(2): ,,, , 26(1): 33 39,,, , 18(4): ,, , 14(4): ,,, , 27(3): , :, 1 20, (1980). :, , 東., 13(4): Ichikawa H, Beardsley R C, Temporal and spatial variability of volume transport of the Kuroshio in the East China Sea. Deep-Sea Res I, 40(3): Saiki M, Relation between the geostrophic flux of the Kuroshio in the eastern China Sea and its large meanders in south of Japan. Oceanogr Mag, 32(1 2): Yuan Y, Pan Z, Kaneko A et al, Variability of the Kuroshio in the East China Sea and the currents east of the Ryukyu Islands. Proceedings of China-Japan JSCRK. Qingdao: China Ocean Press, Zhang Q, Hou Y, Yan T, Interanuual and interdecadal variability in the Kuroshio heat transport in the East China Sea. Int J Climatol, 32(4): THE INTER-ANNUAL AND INTER-DECADAL VARIABILITY OF THE KUROSHIO VOLUME TRANSPORT IN THE EAST CHINA SEA QI Ji-Feng 1, 2, 3, YIN Bao-Shu 1, 2, YANG De-Zhou 1, 2, XU Zhen-Hua 1, 2 (1. Institute of Oceanology, Chinese Academy of Science, Qingdao , China; 2. Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Science, Qingdao , China; 3.University of Chinese Academy of Sciences, Beijing , China) Abstract Based on long-time temperature and salinity data of 1956 to 2005 along the PN section provided by Japan Meteorological Agency and the reanalysis wind data by National Centers for Environmental Prediction (NCEP), the inter-annual and inter-decadal variability characteristics of the Kuroshio volume transport (KVT) in the East China Sea are analyzed. In addition, the influences of the northwest Pacific wind and Pacific Decadal Oscillation (PDO) on the KVT are discussed. The results show that the frequency distribution of KVT is in nearly a normal distribution pattern in range of 19 33Sv. The multi-year seasonal average of the KVT through the PN section is 24.30Sv. All the seasonal mean, winter, and summer KVTs show significant inter-annual and inter-decadal variations. A linear long-term upward trend of the KVT in was revealed during which the seasonal mean, winter, and summer volume transports increased by 8.72, 9.86, and 9.38Sv, respectively. Correlation and composite analysis showed that meridional wind anomalies over the source area of Kuroshio and the Kuroshio area in the East China Sea were responsible for the inter-annual variability in the KVT. Additionally, the inter-decadal variability of the KVT is closely associated with the PDO. Key words East China Sea; Kuroshio; meridional wind; inter-annual variation; interdecadal variation