Barimalala, R., F. Desbiolles, R. C. Blamey, and C. Reason, 2018: Madagascar influence on the South Indian Ocean convergence zone, the Mozambique Channel trough and southern African Rainfall. Geophys. Res. Lett., 45, 11 380−11 389,
Barimalala, R., R. C. Blamey, F. Desbiolles, and C. J. C. Reason, 2020: Variability in the Mozambique Channel Trough and impacts on Southeast African rainfall. J. Climate, 33, 749−765, https://doi.org/10.1175/JCLI-D-19-0267.1.
Behera, S. K., and T. Yamagata, 2001: Subtropical SST dipole events in the southern Indian Ocean. Geophys. Res. Lett., 28, 327−330, https://doi.org/10.1029/2000GL011451.
Compagnucci, R. H., and M. B. Richman, 2008: Can principal component analysis provide atmospheric circulation or teleconnection patterns. International Journal of Climatology, 28, 703−726, https://doi.org/10.1002/joc.1574.
Compagnucci, R. H., D. Araneo, and P. O. Canziani, 2001: Principal sequence pattern analysis: A new approach to classifying the evolution of atmospheric systems. International Journal of Climatology, 21(2), 197−217, https://doi.org/10.1002/joc.601.
Cook, K. H., 2000: The South Indian convergence zone and interannual rainfall variability over southern Africa. J. Climate, 13, 3789−3804, https://doi.org/10.1175/1520-0442(2000)013<3789:TSICZA>2.0.CO;2.
Ding, Q. H., E. J. Steig, D. S. Battisti, and J. M. Wallace, 2012: Influence of the tropics on the southern Annular Mode. J. Climate, 25, 6330−6348, https://doi.org/10.1175/JCLI-D-11-00523.1.
Fauchereau, N., S. Trzaska, Y. Richard, P. Roucou, and P. Camberlin, 2003: Sea-surface temperature co-variability in the southern Atlantic and Indian Oceans and its connections with the atmospheric circulation in the southern Hemisphere. International Journal of Climatology, 23, 663−677, https://doi.org/10.1002/joc.905.
Gong, X. F., and M. B. Richman, 1995: On the application of cluster analysis to growing season precipitation data in North America East of the Rockies. J. Climate, 8, 897−931, https://doi.org/10.1175/1520-0442(1995)008<0897:OTAOCA>2.0.CO;2.
Hendrickson, A. E., and P. O. White, 1964: Promax: A quick method for rotation to oblique simple structure. British Journal of Statistical Psychology, 17, 65−70, https://doi.org/10.1111/j.2044-8317.1964.tb00244.x.
Hermes, J. C., and C. J. C. Reason, 2005: Ocean model diagnosis of interannual coevolving SST variability in the South Indian and South Atlantic Oceans. J. Climate, 18, 2864−2882, https://doi.org/10.1175/JCLI3422.1.
Ho, C. H., J. H. Kim, J. H. Jeong, H. S. Kim, and D. L. Chen, 2006: Variation of tropical cyclone activity in the South Indian Ocean: El Niño-Southern Oscillation and Madden-Julian Oscillation effects. J. Geophys. Res., 111, D22101, https://doi.org/10.1029/2006JD007289.
Hoell, A., C. Funk, J. Zinke, and L. Harrison, 2017: Modulation of the southern Africa precipitation response to the El Niño southern Oscillation by the subtropical Indian Ocean Dipole. Climate Dyn., 48, 2529−2540, https://doi.org/10.1007/s00382-016-3220-6.
Huang, B. Y., and Coauthors, 2017: Extended reconstructed sea surface temperature, version 5 (ERSSTv5): Upgrades, validations, and intercomparisons. J. Climate, 30, 8179−8205, https://doi.org/10.1175/JCLI-D-16-0836.1.
Huth, R., 1996: An intercomparison of computer-assisted circulation classification methods. International Journal of Climatology, 16, 893−922, https://doi.org/10.1002/(SICI)1097-0088(199608)16:8<893::AID-JOC51>3.0.CO;2-Q.
Ibebuchi, C. C., 2021a: On the relationship between circulation patterns, the southern Annular Mode, and rainfall variability in Western Cape. Atmosphere, 12, 753, https://doi.org/10.3390/atmos12060753.
Ibebuchi, C. C., 2021b: Circulation pattern controls of wet days and dry days in Free State, South Africa. Meteorol. Atmos. Phys., 133, 1469−1480, https://doi.org/10.1007/s00703-021-00822-0.
Ibebuchi, C. C., 2021c: Revisiting the 1992 severe drought episode in South Africa: The role of El Niño in the anomalies of atmospheric circulation types in Africa South of the equator. Theor. Appl. Climatol., 146, 723−740, https://doi.org/10.1007/s00704-021-03741-7.
Ibebuchi, C. C., 2022a: Can synoptic patterns influence the track and formation of tropical cyclones in the Mozambique Channel. AIMS Geosciences, 8, 33−51, https://doi.org/10.3934/geosci.2022003.
Ibebuchi, C. C., 2022b: Patterns of atmospheric circulation in western Europe linked to heavy rainfall in Germany: Preliminary analysis into the 2021 heavy rainfall episode. Theor. Appl. Climatol, 148, 269−283, https://doi.org/10.1007/s00704-022-03945-5.
Japan Meteorological Agency., 2006: Characteristics of Global Sea surface temperature analysis data (COBE-SST) for climate use. Vol. 12. Monthly Report on Climate System Separated, 116pp.
Jones, W. P., 1999: First- and second-order conservative remapping schemes for grids in spherical coordinates. Mon. Wea. Rev., 127, 2204−2210, https://doi.org/10.1175/1520-0493(1999)127<2204:FASOCR>2.0.CO;2.
Kalnay, E., and Coauthors, 1996: The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437−472, https://doi.org/10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2.
Kidson, J. W. 1997; The utility of surface and upper air data in synoptic climatological specification of surface climatic variables. Int. J. Climatol. 17, 399−413.
Lazenby, M. J., M. C. Todd, and Y, Wang, 2016: Climate model simulation of the South Indian Ocean Convergence Zone: Mean state and variability. Climate Research, 68, 59−71, https://doi.org/10.3354/cr01382.
Lim, E. P., and H. H. Hendon, 2017: Causes and predictability of the negative Indian Ocean Dipole and its impact on La Niña during 2016. Scientific Reports, 7, 12619, https://doi.org/10.1038/s41598-017-12674-z.
Manatsa, D., W. Chingombe, and C. H. Matarira, 2008: The impact of the positive Indian Ocean dipole on Zimbabwe droughts. International Journal of Climatology, 28, 2011−2029, https://doi.org/10.1002/joc.1695.
Meehl, G. A., 1987: The annual cycle and interannual variability in the tropical Pacific and Indian Ocean regions. Mon. Wea. Rev., 115, 27−50, https://doi.org/10.1175/1520-0493(1987)115<0027:TACAIV>2.0.CO;2.
Morioka, Y., T. Tozuka, and T. Yamagata T, 2010: Climate variability in the southern Indian Ocean as revealed by self-organizing maps. Climate Dyn., 35, 1059−1072, https://doi.org/10.1007/s00382-010-0843-x.
Morioka, Y., K. Takaya, S. K. Behera, and Y. Masumoto, 2015: Local SST impacts on the summertime Mascarene high variability. J. Climate, 28(2), 678−694, https://doi.org/10.1175/JCLI-D-14-00133.1.
Rapolaki, R. S., R. C. Blamey, J. C. Hermes, and C. J. C. Reason, 2020: Moisture sources associated with heavy rainfall over the Limpopo River Basin, southern Africa. Climate Dyn., 55, 1473−1487, https://doi.org/10.1007/s00382-020-05336-w.
Reason, C. J. C., 1999: Interannual warm and cool events in the subtropical/mid-latitude South Indian Ocean region. Geophys. Res. Lett., 26, 215−218, https://doi.org/10.1029/1998GL900285.
Reason, C. J. C., 2001: Subtropical Indian Ocean SST dipole events and southern African rainfall. Geophys. Res. Lett., 28, 2225−2227, https://doi.org/10.1029/2000GL012735.
Reason, C. J. C., 2002: Sensitivity of the southern African circulation to dipole sea-surface temperature patterns in the South Indian Ocean. International Journal of Climatology, 22, 377−393, https://doi.org/10.1002/joc.744.
Reason, C. J. C., 2016: The Bolivian, Botswana, and Bilybara highs and southern Hemisphere drought/floods. Geophys. Res. Lett., 43, 1280−1286, https://doi.org/10.1002/2015GL067228.
Reason, C. J. C., and H. Mulenga, 1999: Relationships between South African rainfall and SST anomalies in the southwest Indian Ocean. International Journal of Climatology, 19, 1651−1673, https://doi.org/10.1002/(SICI)1097-0088(199912)19:15<1651::AID-JOC439>3.0.CO;2-U.
Reason, C. J. C., and M. Rouault, 2005: Links between the Antarctic Oscillation and winter rainfall over western South Africa. Geophys. Res. Lett., 32, L07705, https://doi.org/10.1029/2005GL022419.
Reason, C. J. C., and D. Jagadheesha, 2005: A model investigation of recent ENSO impacts over southern Africa. Meteorol. Atmos. Phys., 89, 181−205, https://doi.org/10.1007/s00703-005-0128-9.
Reason, C. J. C., and S. Smart, 2015: Tropical South East Atlantic warm events and associated rainfall anomalies over southern Africa. Frontiers in Environmental Science, 3, 24, https://doi.org/10.3389/fenvs.2015.00024.
Richman, M. B., 1981: Obliquely rotated principal components: An improved meteorological map typing technique. J. Appl. Meteor., 20, 1145−1159, https://doi.org/10.1175/1520-0450(1981)020<1145:ORPCAI>2.0.CO;2.
Richman, M. B., 1986: Rotation of principal components. J. Climate, 6, 293−335, https://doi.org/10.1002/joc.3370060305.
Richman, M. B., and P. J. Lamb, 1985: Climatic pattern analysis of three- and seven-day summer rainfall in the Central United States: Some methodological considerations and a regionalization. J. Climate Appl. Meteor., 24, 1325−1343, https://doi.org/10.1175/1520-0450(1985)024<1325:CPAOTA>2.0.CO;2.
Richman, M. B., and X. F. Gong, 1999: Relationships between the definition of the hyperplane width to the fidelity of principal component loading patterns. J. Climate, 12, 1557−1576, https://doi.org/10.1175/1520-0442(1999)012<1557:RBTDOT>2.0.CO;2.
Saji, N. H., B. N. Goswami, P. N. Vinayachandran, and T. Yamagata, 1999: A dipole mode in the tropical Indian Ocean. Nature, 401, 360−363, https://doi.org/10.1038/43854.
Thompson, D. W. J., and J. M. Wallace, 2000: Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate, 13, 1000−1016, https://doi.org/10.1175/1520-0442(2000)013<1000:AMITEC>2.0.CO;2.
Thorne, V., P. Coakeley, D. Grimes, and G. Dugdale, 2001: Comparison of TAMSAT and CPC Rainfall Estimates with raingauges, for southern Africa. Int. J. Remote. Sens., 22(10), 1951−1974, https://doi.org/10.1080/01431160118816.
Vigaud, N., Y. Richard, M. Rouault, and N. Fauchereau, 2009: Moisture transport between the South Atlantic Ocean and Southern Africa: Relationships with summer rainfall and associated dynamics. Climate Dyn., 32, 113−123, https://doi.org/10.1007/s00382-008-0377-7.
Walker, N. D., 1990: Links between South African summer rainfall and temperature variability of the Agulhas and Benguela Current systems. J. Geophys. Res., 95, 3297−3319, https://doi.org/10.1029/JC095iC03p03297.
Xie, P. P., M. Y. Chen, S. Yang, A. Yatagai, T. Hayasaka, Y. Fukushima, and C. M. Liu, 2007: A gauge-based analysis of daily precipitation over East Asia. Journal of Hydrometeorology, 8, 607−626, https://doi.org/10.1175/JHM583.1.
Xue, F., H. J. Wang, and J. H. He, 2003: Interannual variability of Mascarene High and Australian High and their influences on summer rainfall over East Asia. Chinese Science Bulletin, 48, 492−497, https://doi.org/10.1007/BF03183258.
Yuan, C. X., T. Tozuka, W. A. Landman, and T. Yamagata, 2014a: Dynamical seasonal prediction of southern African summer precipitation. Climate Dyn., 42, 3357−3374, https://doi.org/10.1007/s00382-013-1923-5.
Yuan, C. X., T. Tozuka, J.-J. Luo, and T. Yamagata, 2014b: Predictability of the subtropical dipole modes in a coupled ocean-atmosphere model. Climate Dyn., 42, 1291−1308, https://doi.org/10.1007/s00382-013-1704-1.