Table of Contents
International Journal of Atmospheric Sciences
Volume 2014, Article ID 759067, 11 pages
http://dx.doi.org/10.1155/2014/759067
Research Article

An Advanced Review of the Relationships between Sahel Precipitation and Climate Indices: A Wavelet Approach

Beltsville Center for Climate System Observation, Atmospheric Science Program, Howard University, Washington, DC 20059, USA

Received 15 January 2014; Revised 25 March 2014; Accepted 26 March 2014; Published 28 April 2014

Academic Editor: Helena A. Flocas

Copyright © 2014 Churchill Okonkwo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. Z. T. Segele and P. J. Lamb, “Characterization and variability of Kiremt rainy season over Ethiopia,” Meteorology and Atmospheric Physics, vol. 89, no. 1–4, pp. 153–180, 2005. View at Publisher · View at Google Scholar · View at Scopus
  2. C. Cook, C. J. C. Reason, and B. C. Hewitson, “Wet and dry spells within particularly wet and dry summers in the South African summer rainfall region,” Climate Research, vol. 26, no. 1, pp. 17–31, 2004. View at Google Scholar · View at Scopus
  3. S. E. Nicholson, “On the factors modulating the intensity of the tropical rainbelt over West Africa,” International Journal of Climatology, vol. 29, no. 5, pp. 673–689, 2009. View at Publisher · View at Google Scholar · View at Scopus
  4. P. Desanker and C. Magadza, Africa Climate Change 2001: Impacts, Adaptation and Vulnerability, Cambridge University Press, New York, NY, USA, J. J. McCarthy, O. F. Canziani, N. A. Leary, D. J. Dokken, K. S. White, Eds., 2001.
  5. R. Washington, M. Harrison, D. Conway et al., “African climate change: taking the shorter route,” Bulletin of the American Meteorological Society, vol. 87, no. 10, pp. 1355–1366, 2006. View at Publisher · View at Google Scholar · View at Scopus
  6. S. E. Nicholson, C. J. Tucker, and M. B. Ba, “Desertification, drought, and surface vegetation: an example from the West African Sahel,” Bulletin of the American Meteorological Society, vol. 79, no. 5, pp. 815–829, 1998. View at Google Scholar · View at Scopus
  7. A. Tarhule and P. J. Lamb, “Climate research and seasonal forecasting for West Africans,” Bulletin of the American Meteorological Society, vol. 84, no. 12, pp. 1741–1759, 2003. View at Publisher · View at Google Scholar · View at Scopus
  8. Disaster Management Centre D. M. C., Natural Disasters: Causes and Effects. Lesson 7: Drought, Disaster Management Centre, University of Wisconsin, Madison, Wis, USA, 1995.
  9. J. G. Charney, “Dynamics of deserts and drought in the Sahel,” Quarterly Journal of the Royal Meteorological Society, vol. 101, no. 428, pp. 193–202, 1975. View at Publisher · View at Google Scholar
  10. Y. Xue and J. Shukla, “The influence of land surface properties on Sahel climate—part I: desertification,” Journal of Climate, vol. 6, no. 12, pp. 2232–2245, 1993. View at Google Scholar · View at Scopus
  11. C. M. Taylor, E. F. Lambin, N. Stephenne, R. J. Harding, and R. L. H. Essery, “The influence of land use change on climate in the Sahel,” Journal of Climate, vol. 15, no. 24, pp. 3615–3629, 2002. View at Google Scholar · View at Scopus
  12. K. Y. Li, M. T. Coe, N. Ramankutty, and R. D. Jong, “Modeling the hydrological impact of land-use change in West Africa,” Journal of Hydrology, vol. 337, no. 3-4, pp. 258–268, 2007. View at Publisher · View at Google Scholar · View at Scopus
  13. J. F. Reynolds and S. D. M. Stafford, Global Desertification: Do Humans Cause Deserts?Dahlem University Press, Berlin, Germany, 2002.
  14. S. D. Prince, Spatial and Temporal Scales For Detection of Desertification in Global Desertification: Do Humans Cause Deserts?Dahlem University Press, Berlin, Germany, J. F. Reynolds, D. M. S. Smith, Eds., 2002.
  15. A. Giannini, R. Saravanan, and P. Chang, “Oceanic forcing of Sahel rainfall on interannual to interdecadal time scales,” Science, vol. 302, no. 5647, pp. 1027–1030, 2003. View at Publisher · View at Google Scholar · View at Scopus
  16. C. Caminade and L. Terray, “Twentieth century Sahel rainfall variability as simulated by the ARPEGE AGCM, and future changes,” Climate Dynamics, vol. 35, no. 1, pp. 75–94, 2010. View at Publisher · View at Google Scholar · View at Scopus
  17. M. Biasutti, I. M. Held, A. H. Sobel, and A. Giannini, “SST forcings and Sahel rainfall variability in simulations of the twentieth and twenty-first centuries,” Journal of Climate, vol. 21, no. 14, pp. 3471–3486, 2008. View at Publisher · View at Google Scholar · View at Scopus
  18. A. Giannini, M. Biasutti, I. M. Held, and A. H. Sobel, “A global perspective on African climate,” Climatic Change, vol. 90, no. 4, pp. 359–383, 2008. View at Publisher · View at Google Scholar · View at Scopus
  19. S. E. Nicholson, “The West African Sahel: a review of recent studies on the rainfall regime and its interannual variability,” ISRN Meteorology, vol. 2013, Article ID 453521, 32 pages, 2013. View at Publisher · View at Google Scholar
  20. C. K. Folland, T. N. Palmer, and D. E. Parker, “Sahel rainfall and worldwide sea temperatures, 1901–85,” Nature, vol. 320, no. 6063, pp. 602–607, 1986. View at Google Scholar · View at Scopus
  21. J. Lu and T. L. Delworth, “Oceanic forcing of the late 20th century Sahel drought,” Geophysical Research Letters, vol. 32, no. 22, Article ID L22706, pp. 1–5, 2005. View at Publisher · View at Google Scholar · View at Scopus
  22. M. Hoerling, J. Hurrell, J. Eischeid, and A. Phillips, “Detection and attribution of twentieth-century northern and southern African rainfall change,” Journal of Climate, vol. 19, no. 16, pp. 3989–4008, 2006. View at Publisher · View at Google Scholar · View at Scopus
  23. I. Polo, A. Ullmann, P. Roucou, and B. Fontaine, “Weather regimes in the Euro-Atlantic and Mediterranean sector, and relationship with West African rainfall over the 1989–2008 period from a self-organizing maps approach,” Journal of Climate, vol. 24, no. 13, pp. 3423–3432, 2011. View at Publisher · View at Google Scholar · View at Scopus
  24. R. Zhang and T. L. Delworth, “Impact of Atlantic multidecadal oscillations on India/Sahel rainfall and Atlantic hurricanes,” Geophysical Research Letters, vol. 33, no. 17, Article ID L17712, 2006. View at Publisher · View at Google Scholar · View at Scopus
  25. T. Delworth, L. R. Zhang, and M. E. Mann, “Decadal to centennial variability of the Atlantic from observations and models. Ocean circulation: mechanisms and impacts,” Geophysical Monograph Series, vol. 173, pp. 121–148, 2007. View at Google Scholar
  26. I. Polo, B. Rodríguez-Fonseca, T. Losada, and J. García-Serrano, “Tropical atlantic variability modes (1979–2002)—part I: time-evolving SST modes related to West African rainfall,” Journal of Climate, vol. 21, no. 24, pp. 6457–6475, 2008. View at Publisher · View at Google Scholar · View at Scopus
  27. F. Raicich, N. Pinardi, and A. Navarra, “Teleconnections between Indian monsoon and Sahel rainfall and the Mediterranean,” International Journal of Climatology, vol. 23, no. 2, pp. 173–186, 2003. View at Publisher · View at Google Scholar · View at Scopus
  28. C. E. Chung and V. Ramanathan, “Weakening of north Indian SST gradients and the monsoon rainfall in India and the Sahel,” Journal of Climate, vol. 19, no. 10, pp. 2036–2045, 2006. View at Publisher · View at Google Scholar · View at Scopus
  29. D. P. Rowell, “Teleconnections between the tropical Pacific and the Sahel,” Quarterly Journal of the Royal Meteorological Society, vol. 127, no. 575, pp. 1683–1706, 2001. View at Publisher · View at Google Scholar · View at Scopus
  30. M. Joly, A. Voldoire, H. Douville, P. Terray, and J.-F. Royer, “African monsoon teleconnections with tropical SSTs: validation and evolution in a set of IPCC4 simulations,” Climate Dynamics, vol. 29, no. 1, pp. 1–20, 2007. View at Publisher · View at Google Scholar · View at Scopus
  31. S. Janicot and B. Sultan, “Intra-seasonal modulation of convection in the West African monsoon,” Geophysical Research Letters, vol. 28, no. 3, pp. 523–526, 2001. View at Publisher · View at Google Scholar · View at Scopus
  32. M. Joly and A. Voldoire, “Role of the Gulf of Guinea in the inter-annual variability of the West African monsoon: what do we learn from CMIP3 coupled simulations?” International Journal of Climatology, vol. 30, no. 12, pp. 1843–1856, 2010. View at Publisher · View at Google Scholar · View at Scopus
  33. J. Bader and M. Latif, “The impact of decadal-scale Indian ocean sea surface temperature anomalies on Sahelian rainfall and the North Atlantic oscillation,” Geophysical Research Letters, vol. 30, no. 22, pp. 2169–2173, 2003. View at Google Scholar · View at Scopus
  34. L. M. Druyan, “Studies of 21st-century precipitation trends over West Africa,” International Journal of Climatology, vol. 31, no. 10, pp. 1415–1424, 2011. View at Publisher · View at Google Scholar · View at Scopus
  35. S.-Y. Wang and R. R. Gillies, “Observed change in Sahel rainfall, circulations, African easterly waves, and Atlantic hurricanes since 1979,” International Journal of Geophysics, vol. 2011, Article ID 259529, 14 pages, 2011. View at Publisher · View at Google Scholar
  36. J. H. Christensen, T. R. Carter, M. Rummukainen, and G. Amanatidis, “Evaluating the performance and utility of regional climate models: the PRUDENCE project,” Climatic Change, vol. 81, no. 1, pp. 1–6, 2007. View at Publisher · View at Google Scholar · View at Scopus
  37. G. S. Jenkins, A. T. Gaye, and B. Sylla, “Late 20th century attribution of drying trends in the Sahel from the Regional Climate Model (RegCM3),” Geophysical Research Letters, vol. 32, no. 22, Article ID L22705, pp. 1–4, 2005. View at Publisher · View at Google Scholar · View at Scopus
  38. G. Wang and E. A. B. Eltahir, “Ecosystem dynamics and the Sahel drought,” Geophysical Research Letters, vol. 27, no. 6, pp. 795–798, 2000. View at Publisher · View at Google Scholar · View at Scopus
  39. B. Cazelles, M. Chavez, D. Berteaux et al., “Wavelet analysis of ecological time series,” Oecologia, vol. 156, no. 2, pp. 287–304, 2008. View at Publisher · View at Google Scholar · View at Scopus
  40. M. À. Rodríguez-Arias and X. Rodó, “A primer on the study of transitory dynamics in ecological series using the scale-dependent correlation analysis,” Oecologia, vol. 138, no. 4, pp. 485–504, 2004. View at Publisher · View at Google Scholar · View at Scopus
  41. R. F. Adler, G. J. Huffman, A. Chang et al., “The version-2 global precipitation climatology project (GPCP) monthly precipitation analysis (1979–present),” Journal of Hydrometeorology, vol. 4, no. 6, pp. 1147–1167, 2003. View at Google Scholar
  42. J. E. Janowiak, “An investigation of interannual rainfall variability in Africa,” Journal of Climate, vol. 1, no. 3, pp. 240–255, 1988. View at Publisher · View at Google Scholar
  43. A. Kaplan, M. A. Cane, Y. Kushnir, A. C. Clement, M. B. Blumenthal, and B. Rajagopalan, “Analyses of global sea surface temperature 1856–1991,” Journal of Geophysical Research C: Oceans, vol. 103, no. 9, pp. 18567–18589, 1998. View at Publisher · View at Google Scholar · View at Scopus
  44. Climate Prediction Center (CPC), “Description of changes to oceanic Niño indexes,” 2013, http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/ONI_change.shtml.
  45. N. H. Saji, B. N. Goswami, P. N. Vinayachandran, and T. Yamagata, “A dipole mode in the tropical Indian ocean,” Nature, vol. 401, no. 6751, pp. 360–363, 1999. View at Publisher · View at Google Scholar · View at Scopus
  46. J. W. Hurrell, “Decadal trends in the North Atlantic oscillation: regional temperatures and precipitation,” Science, vol. 269, no. 5224, pp. 676–679, 1995. View at Google Scholar · View at Scopus
  47. P. D. Jones, T. Jonsson, and D. Wheeler, “Extension to the North Atlantic oscillation using early instrumental pressure observations from gibraltar and south-west Iceland,” International Journal of Climatology, vol. 17, no. 13, pp. 1433–1450, 1997. View at Google Scholar · View at Scopus
  48. J. C. Rogers, “The association between the North Atlantic oscillation and the Southern oscillation in the Northern Hemisphere,” Monthly Weather Review, vol. 112, no. 10, pp. 1999–2015, 1984. View at Google Scholar · View at Scopus
  49. UCAR, Persistent Patterns That Shape Weather and Climate Variability: A Glossary, NCAR & UCAR, Boulder, Colo, USA, 2009, B. H. K.Trenberth, Z. Gallon, Eds.
  50. M. E. Brown, K. de Beurs, and A. Vrieling, “The response of African land surface phenology to large scale climate oscillations,” Remote Sensing of Environment, vol. 114, no. 10, pp. 2286–2296, 2010. View at Publisher · View at Google Scholar · View at Scopus
  51. G. J. Huffman, R. F. Adler, M. M. Morrissey et al., “Global precipitation at one-degree daily resolution from multisatellite observations,” Journal of Hydrometeorology, vol. 2, no. 1, pp. 36–50, 2001. View at Google Scholar
  52. S. Nicholson, “On the question of the “recovery” of the rains in the West African Sahel,” Journal of Arid Environments, vol. 63, no. 3, pp. 615–641, 2005. View at Publisher · View at Google Scholar · View at Scopus
  53. P. J. Lamb, “Sub-Saharan rainfall update for 1982: continued drought,” Journal of Climatology, vol. 3, no. 4, pp. 419–422, 1983. View at Google Scholar · View at Scopus
  54. P. J. Lamb and R. A. Peppler, “Further case studies of tropical Atlantic surface atmospheric and oceanic patterns associated with sub-Saharan drought,” Journal of Climate, vol. 5, no. 5, pp. 476–488, 1992. View at Google Scholar
  55. T. Lebel and A. Ali, “Recent trends in the Central and Western Sahel rainfall regime (1990–2007),” Journal of Hydrology, vol. 375, no. 1-2, pp. 52–64, 2009. View at Publisher · View at Google Scholar · View at Scopus
  56. F. Sima, A. Kamga, I. Raiva, F. S. Dekaa, and A. I. James, “State of the climate 2012: [Africa] West Africa,” Bulletin of the American Meteorological Society, vol. 94, no. 8, pp. S161–S166, 2013. View at Google Scholar
  57. C. G. Torrence and P. Compo, “A practical guide to wavelet analysis,” Bulletin of the American Meteorological Society, vol. 79, no. 1, pp. 61–78, 1998. View at Google Scholar · View at Scopus
  58. A. Grinsted, J. C. Moore, and S. Jevrejeva, “Application of the cross wavelet transform and wavelet coherence to geophysical times series,” Nonlinear Processes in Geophysics, vol. 11, no. 5-6, pp. 561–566, 2004. View at Google Scholar · View at Scopus
  59. S. E. Nicholson, B. Some, and B. Kone, “An analysis of recent rainfall conditions in West Africa, including the rainy seasons of the 1997 El Nino and the 1998 La Nina years,” Journal of Climate, vol. 13, no. 14, pp. 2628–2640, 2000. View at Google Scholar · View at Scopus
  60. M. N. Ward, “Diagnosis and short-lead time prediction of summer rainfall in tropical North Africa at interannual and multidecadal timescales,” Journal of Climate, vol. 11, no. 12, pp. 3167–3191, 1998. View at Google Scholar · View at Scopus
  61. C. K. Folland, J. Knight, H. W. Linderholm, D. Fereday, S. Ineson, and J. W. Hurrel, “The summer North Atlantic oscillation: past, present, and future,” Journal of Climate, vol. 22, no. 5, pp. 1082–1103, 2009. View at Publisher · View at Google Scholar · View at Scopus
  62. E. R. Martin and C. D. Thorncroft, “The impact of the AMO on the West African monsoon annual cycle,” Quarterly Journal of the Royal Meteorological Society, vol. 140, no. 678, pp. 31–46, 2014. View at Publisher · View at Google Scholar
  63. K. E. Trenberth and D. P. Stepaniak, “Indices of El Niño evolution,” Journal of Climate, vol. 14, no. 8, pp. 1697–1701, 2001. View at Google Scholar · View at Scopus
  64. J. Bjerknes, “Atmospheric teleconnections from the equatorial Pacific,” Monthly Weather Review, vol. 97, no. 3, pp. 163–172, 1969. View at Google Scholar
  65. C. Okonkwo, B. Demoz, and S. Tesfai, “Characterization of West African jet streams and their association to ENSO events and rainfall in ERA-interim 1979–2011,” Advances in Meteorology, vol. 2014, Article ID 405617, 12 pages, 2014. View at Publisher · View at Google Scholar
  66. S. Janicot, F. Mounier, S. Gervois, B. Sultan, and G. N. Kiladis, “The dynamics of the West African monsoon—part V: the detection and role of the dominant modes of convectively coupled equatorial Rossby waves,” Journal of Climate, vol. 23, no. 14, pp. 4005–4024, 2010. View at Publisher · View at Google Scholar · View at Scopus