Regional atmospheric circulation and rainfall variability in south equatorial Africa

Journal of Climate

Volumn 28, Issue 2, 2015, Pages 809-818

  Dezfuli, Amin K ^a   Zaitchik, Benjamin F ^a   Gnanadesikan, Anand ^a  

^a JOHNS HOPKINS UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

PRESSURE GRADIENT;

ASYMMETRIC PATTERNS; ATMOSPHERIC CIRCULATION; DAILY PRECIPITATIONS; EQUATORIAL AFRICA; RAINFALL VARIABILITY; TROPICAL ATLANTIC; WEATHER SCALE; WESTERLY WINDS;

PRECIPITATION (METEOROLOGY);

ATMOSPHERIC CIRCULATION; ATMOSPHERIC CONVECTION; CLIMATE VARIATION; PRECIPITATION (CLIMATOLOGY); PRESSURE GRADIENT; RAINFALL; REGIONAL CLIMATE; WIND;

AFRICA; ATLANTIC OCEAN; ATLANTIC OCEAN (TROPICAL); EAST AFRICAN PLATEAU; INDIAN OCEAN; INDIAN OCEAN (SOUTHWEST);

EID: 84921632617     PISSN: 08948755     EISSN: None     Source Type: Journal    
DOI: 10.1175/JCLI-D-14-00333.1     Document Type: Article

References (40)

1. Alexander, M. A., I. Bladé, M. Newman, J. R. Lanzante, N.-C. Lau, and J. D. Scott, 2002: The atmospheric bridge: The influence of ENSO teleconnections on air-sea interaction over the global oceans. J. Climate, 15, 2205-2231, doi:10.1175/1520-0442(2002)015<2205:TABTIO>2.0.CO;2.
2. Balas, N., S. E. Nicholson, and D. Klotter, 2007: The relationship of rainfall variability in West Central Africa to sea-surface temperature fluctuations. Int. J. Climatol., 27, 1335-1349, doi:10.1002/joc.1456.
3. Black, E., J. Slingo, and K. R. Sperber, 2003: An observational study of the relationship between excessively strong short rains in coastal East Africa and Indian Ocean SST. Mon. Wea. Rev., 131, 74-94, doi:10.1175/1520-0493(2003)131<0074:AOSOTR>2.0.CO;2.
4. Camberlin, P., 1997: Rainfall anomalies in the source region of the Nile and their connection with the Indian summer monsoon. J. Climate, 10, 1380-1392, doi:10.1175/1520-0442(1997)010<1380:RAITSR>2.0.CO;2.
5. Collier, A. B., and A. R. W. Hughes, 2011: A harmonic model for the temporal variation of lightning activity over Africa. J. Geophys. Res., 116, D05105, doi:10.1029/2010JD014455.
6. Cook, C., C. J. Reason, and B. C. Hewitson, 2004: Wet and dry spells within particularly wet and dry summers in the South African summer rainfall region. Climate Res., 26, 17-31, doi:10.3354/cr026017.
7. Cook, K. H., 2000: The South Indian convergence zone and interannual rainfall variability over southern Africa. J. Climate, 13, 3789-3804, doi:10.1175/1520-0442(2000)013<3789:TSICZA>2.0.CO;2.
8. Cook, K. H., and E. K. Vizy, 2013: Projected changes in East African rainy seasons. J. Climate, 26, 5931-5948, doi:10.1175/JCLI-D-12-00455.1.
9. Dezfuli, A. K., 2011: Spatio-temporal variability of seasonal rainfall in western equatorial Africa. Theor. Appl. Climatol., 104, 57-69, doi:10.1007/s00704-010-0321-8.
10. Dezfuli, A. K., and S. E. Nicholson, 2013: The relationship of rainfall variability in western equatorial Africa to the tropical oceans and atmospheric circulation. Part II: The boreal autumn. J. Climate, 26, 66-84, doi:10.1175/JCLI-D-11-00686.1.
11. Farnsworth, A., E. White, C. J. Williams, E. Black, and D. R. Kniveton, 2011: Understanding the large scale driving mechanisms of rainfall variability over Central Africa. African Climate and Climate Change, C. J. R. Williams and D. R. Kniveton, Eds., Physical, Social, and Political Perspectives Series, Vol. 43, Springer, 101-122.
12. Fauchereau, N., B.Pohl, C. J. C.Reason, M.Rouault, and Y.Richard, 2009: Recurrent daily OLR patterns in the Southern Africa/Southwest Indian Ocean region, implications for South African rainfall and teleconnections. Climate Dyn., 32, 575-591, doi:10.1007/s00382-008-0426-2.
13. Giannini, A., M. Biasutti, I. M. Held, and A. H. Sobel, 2008: A global perspective on African climate. Climatic Change, 90, 359-383, doi:10.1007/s10584-008-9396-y.
14. Hession, S. L., and N. Moore, 2011: A spatial regression analysis of the influence of topography on monthly rainfall in East Africa. Int. J. Climatol., 31, 1440-1456, doi:10.1002/joc.2174.
15. Hirst, A. C., and S. Hastenrath, 1983: Atmosphere-ocean mechanisms of climate anomalies in the Angola-tropical Atlantic sector. J. Phys. Oceanogr., 13, 1146-1157, doi:10.1175/1520-0485(1983)013<1146:AOMOCA>2.0.CO;2.
16. Huffman, G. J., R. F. Adler, D. T. Bolvin, and E. J. Nelkin, 2010: The TRMM Multi-Satellite Precipitation Analysis (TMPA). Satellite Rainfall Applications for Surface Hydrology, M. Gebremichael and F. Hossain, Eds., Springer, 3-22.
17. Hulme, M., R. Doherty, T. Ngara, M. New, and D. Lister, 2001: African climate change: 1900-2100. Climate Res., 17, 145-168, doi:10.3354/cr017145.
18. James, R., R. Washington, and D. P. Rowell, 2013: Implications of global warming for the climate of African rainforests. Philos. Trans. Roy. Soc. London, 368B, 1625, doi:10.1098/rstb.2012.0298.
19. Kistler, R., and Coauthors, 2001: The NCEP-NCAR 50-Year Reanalysis: Monthly means CD-ROM and documentation. Bull. Amer. Meteor. Soc., 82, 247-267, doi:10.1175/1520-0477(2001)082<0247:TNNYRM>2.3.CO;2.
20. Laing, A. G., R. E. Carbone, and V. Levizzani, 2011: Cycles and propagation of deep convection over equatorial Africa. Mon. Wea. Rev., 139, 2832-2853, doi:10.1175/2011MWR3500.1.
21. Latif, M., D. Dommenget, M. Dima, and A. Grötzner, 1999: The role of Indian Ocean sea surface temperature in forcing east African rainfall anomalies during December-January 1997/98. J. Climate, 12, 3497-3504, doi:10.1175/1520-0442(1999)012<3497:TROIOS>2.0.CO;2.
22. Li, W., L. Li, M. Ting, and Y. Liu, 2012: Intensification of Northern Hemisphere subtropical highs in a warming climate. Nat. Geosci., 5, 830-834, doi:10.1038/ngeo1590.
23. Macron, C., B. Pohl, Y. Richard, and M. Bessafi, 2014: How do tropical temperate troughs form and develop over southern Africa? J. Climate, 27, 1633-1647, doi:10.1175/JCLI-D-13-00175.1.
24. Manhique, A. J., C. J. C. Reason, L. Rydberg, and N. Fauchereau, 2011: ENSO and Indian Ocean sea surface temperatures and their relationships with tropical temperate troughs over Mozambique and the Southwest Indian Ocean. Int. J. Climatol., 31, 1-13, doi:10.1002/joc.2050.
25. Mohr, K. L., and E. J. Zipser, 1996: Mesoscale convective systems defined by their 85-GHz ice scattering signature: Size and intensity comparison over tropical oceans and continents. Mon. Wea. Rev., 124, 2417-2437, doi:10.1175/1520-0493(1996)124<2417:MCSDBT>2.0.CO;2.
26. Mutai, C. C., and M. N. Ward, 2000: East African rainfall and the tropical circulation/convection on intraseasonal to interannual timescales. J. Climate, 13, 3915-3939, doi:10.1175/1520-0442(2000)013<3915:EARATT>2.0.CO;2.
27. Nguyen, H., and J. P. Duvel, 2008: Synoptic wave perturbations and convective systems over equatorial Africa. J. Climate, 21, 6372-6388, doi:10.1175/2008JCLI2409.1.
28. Nicholson, S. E., and J. P. Grist, 2003: The seasonal evolution of the atmospheric circulation over West Africa and equatorial Africa. J. Climate, 16, 1013-1030, doi:10.1175/1520-0442(2003)016<1013:TSEOTA>2.0.CO;2.
29. Nicholson, S. E., and A. K. Dezfuli, 2013: The relationship of rainfall variability in western equatorial Africa to the tropical oceans and atmospheric circulation. Part I: The boreal spring. J. Climate, 26, 45-65, doi:10.1175/JCLI-D-11-00653.1.
30. Oettli, P., and P. Camberlin, 2005: Influence of topography on monthly rainfall distribution over East Africa. Climate Res., 28, 199-212, doi:10.3354/cr028199.
31. Pokam, W. M., L. A. T. Djiotang, and F. K. Mkankam, 2012: Atmospheric water vapor transport and recycling in Equatorial Central Africa through NCEP/NCAR reanalysis data. Climate Dyn., 38, 1715-1729, doi:10.1007/s00382-011-1242-7.
32. Reason, C. J. C., and D. Jagadheesha, 2005: A model investigation of recent ENSO impacts over southern Africa. Meteor. Atmos. Phys., 89, 181-205, doi:10.1007/s00703-005-0128-9.
33. Seidel, D. J., Q. Fu, W. J. Randel, and T. J. Reichler, 2008: Widening of the tropical belt in a changing climate. Nat. Geosci., 1, 21-24, doi:10.1038/ngeo.2007.38.
34. Tierney, J. E., J. E. Smerdon, K. J. Anchukaitis, and R. Seager, 2013: Multidecadal variability in East African hydroclimate controlled by the Indian Ocean. Nature, 493, 389-392, doi:10.1038/nature11785.
35. Todd, M., and R. Washington, 1999: Circulation anomalies associated with tropical-temperate troughs in southern Africa and the southwest Indian Ocean. Climate Dyn., 15, 937-951, doi:10.1007/s003820050323.
36. Ummenhofer, C. C., A. Sen Gupta, M. H. England, and C. J. Reason, 2009: Contributions of Indian Ocean sea surface temperatures to enhanced East African rainfall. J. Climate, 22, 993-1013, doi:10.1175/2008JCLI2493.1.
37. Vigaud, N., Y. Richard, M. Rouault, and N. Fauchereau, 2007: Water vapour transport from the tropical Atlantic and summer rainfall in tropical southern Africa. Climate Dyn., 28, 113-123, doi:10.1007/s00382-006-0186-9.
38. Washington, R., R. James, H. Pearce, W. M. Pokam, and W. Moufouma-Okia, 2013: Congo Basin rainfall climatology:Can we believe the climate models? Philos. Trans. Roy. Soc. London, 368B, 1625, doi:10.1098/rstb.2012.0296.
39. Williams, A. P., and C. Funk, 2011: A westward extension of the warm pool leads to a westward extension of the Walker circulation, drying eastern Africa. Climate Dyn., 37, 2417-2435, doi:10.1007/s00382-010-0984-y.
40. Williams, A. P., and Coauthors, 2012: Recent summer precipitation trends in the Greater Horn of Africa and the emerging role of Indian Ocean sea surface temperature. Climate Dyn., 39, 2307-2328, doi:10.1007/s00382-011-1222-y.