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Article >  Journal of Tropical Meteorology  > 2002 >  8(2): 158-167

DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY

  • Nanjing Institute of Meteorology

Funding:

  • The mass stream function of zonal mean meridional circulation is calculated in terms of NCEP/NCAR monthly meridional wind speed and vertical velocity, and the climatic and anomalous features of zonal mean SST and meridional circulation are investigated. Results show that (1) a joint ascending branch of Northern and Southern Hadley circulation is on the side of the summer hemisphere near the equator ,being well consistent with the extremum of [SST ],and a strong descending by the winter-hemispheric side.(2)El Nino-related [SST] in low latitudes is an important outer-forcing source for anomaly meridional circulation, which is affected by seasonal variation of basic airflow and [SST ], and interannual and interdecadal changes of [SST] .
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    [7] WANG Pan-xing. Diagnosis of mean meridional circulation of the model atmosphere in the GCM with lowresolution vertically [J]. Journal of Nanjing Institute of Meteorology, 1994, 17: 200-204.
    [8] KALNAY E, KANAMITSU M, KISTLER R. The NCEP/NCAR 40-year reanalysis project [J]. Bulletin of theAmerican Meteorological Society, 1996, 77: 437-471.
    [9] Service Center for Atmospheric information, Nanjing Institute of Meteorology, Earth Science Department,Council of Natural Science Foundation of China. Bulletin of Data [J]. Journal of Nanjing Institute ofMeteorology, 1998, 21: 455-458.
    [10] PALMEN E, VUORELA L. On the mean meridional circulations in the northern hemisphere during thewinter season [J]. Quarterly Journal of Royal Meteorological Society, 1963, 89: 131-138.
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CHENG Ya-jun, WANG Pan-xing, LI Li-ping. DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY [J]. Journal of Tropical Meteorology, 2002, 8(2): 158-167.
CHENG Ya-jun, WANG Pan-xing, LI Li-ping. DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY [J]. Journal of Tropical Meteorology, 2002, 8(2): 158-167.
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    DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY

    • Nanjing Institute of Meteorology

    Abstract: The mass stream function of zonal mean meridional circulation is calculated in terms of NCEP/NCAR monthly meridional wind speed and vertical velocity, and the climatic and anomalous features of zonal mean SST and meridional circulation are investigated. Results show that (1) a joint ascending branch of Northern and Southern Hadley circulation is on the side of the summer hemisphere near the equator ,being well consistent with the extremum of [SST ],and a strong descending by the winter-hemispheric side.(2)El Nino-related [SST] in low latitudes is an important outer-forcing source for anomaly meridional circulation, which is affected by seasonal variation of basic airflow and [SST ], and interannual and interdecadal changes of [SST] .

    CHENG Ya-jun, WANG Pan-xing, LI Li-ping. DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY [J]. Journal of Tropical Meteorology, 2002, 8(2): 158-167.
    Citation: CHENG Ya-jun, WANG Pan-xing, LI Li-ping. DIAGNOSTIC ANALYSIS OF MEAN MERIDIONAL CIRCULATION ANOMALY IN LOW LATITUDES IN RELATION TO ZONAL MEAN SST ANOMALY [J]. Journal of Tropical Meteorology, 2002, 8(2): 158-167.
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