气象学报（英文版）
氣象學報（英文版）
기상학보（영문판）
ACTA METEOROLOGICA SINICA
2015年
2期
214-227
,共14页
肖子牛%石文静%杨萍
肖子牛%石文靜%楊萍
초자우%석문정%양평
interdecadal transition%Somali jet%index%Asian summer monsoon%southern Indian Ocean%sea surface temperature
This observational study demonstrates that the Somali jet (SMJ) experienced a notable interdecadal transition in not only its lower-level parts (< 850 hPa) but also its higher-level parts (850–600 hPa) in the late 1990s. The results also show that the jet at higher level is more signifi cantly related to East Asian monsoon rainfall than that at lower level. Thus, a new whole-layer SMJ (WSMJ) index which includes variations of the higher-level jet is defi ned based on the average meridional wind speed at fi ve levels (1000–600 hPa). The interdecadal transition of the SMJ can be mainly attributed to the meridional thermal contrast anomalies near the equator which are associated with the three-pole pattern of the southern Indian Ocean.
