Climate Dynamics

, Volume 47, Issue 9–10, pp 3191–3202

Multi-year wind dynamics around Lake Tanganyika

  • D. Docquier
  • W. Thiery
  • S. Lhermitte
  • N. van Lipzig
Article

Abstract

Lake Tanganyika is the second largest freshwater lake in the world by volume and is of prime importance for the regional economy in East Africa. Although the lake is recognized as a key component of the regional climate system, little is known about atmospheric dynamics in its surroundings. To understand this role, we analyze winds around Lake Tanganyika as modeled by a high resolution (7 km) regional climate model (Consortium for Small-scale Modeling in Climate Mode) over the period 1999–2008. Modeled surface wind speed and direction are in very good agreement with high resolution (12.5 km) Quick Scatterometer (QuikSCAT) satellite wind observations during the dry season. Comparison of a control run with a model simulation where all lake pixels are replaced by representative land pixels indicates that mean surface wind speed over Lake Tanganyika almost doubles due to lake presence. Furthermore, a region of higher surface wind speed in the central part of the lake is identified and confirmed by QuikSCAT observations. A combination of wind channeling along valley mountains and wind confluence on the upwind side of the lake is responsible for this speed-up. The lower wind speeds in the rest of the lake result from blocked conditions due to more pronounced orography. Finally, the model captures a zone of higher wind speed at around 2 km height, associated with the low-level Somali jet. These results demonstrate that high resolution climate modeling allows a detailed understanding of wind dynamics in the vicinity of Lake Tanganyika.

Keywords

Lake Tanganyika Wind Regional climate model Orography 

References

  1. Akkermans T, Lauwaet D, Demuzere M, Vogel G, Nouvellon Y, Ardö J, Caquet B, De Grandcourt A, Merbold L, Kutsch W, Van Lipzig N (2012) Validation and comparison of two soil-vegetation-atmosphere transfer models for tropical Africa. J Geophys Res 117(G02):013. doi:10.1029/2011JG001802 Google Scholar
  2. Akkermans T, Rompaey AV, Lipzig NV (2013) Quantifying successional land cover after clearing of tropical rainforest along forest frontiers in the Congo Basin. Phys Geogr 34(6):417–440. doi:10.1080/02723646.2013.855698 Google Scholar
  3. Akkermans T, Thiery W, Van Lipzig NPM (2014) The regional climate impact of a realistic future deforestation scenario in the Congo Basin. J Clim 27(7):2714–2734. doi:10.1175/JCLI-D-13-00361.1 CrossRefGoogle Scholar
  4. Bentamy A, Grodsky SA, Carton JA, Croiz-Fillon D, Chapron B (2012) Matching ASCAT and QuikSCAT winds. J Geophys Res Oceans. doi:10.1029/2011JC007479 Google Scholar
  5. Chakraborty A, Nanjundiah RS, Srinivasan J (2009) Impact of african orography and the indian summer monsoon on the low-level somali jet. Int J Climatol 29(7):983–992. doi:10.1002/joc.1720 CrossRefGoogle Scholar
  6. Coulter GW (1991) Lake Tanganyika and its life. Oxford University Press, LondonGoogle Scholar
  7. Davarzani H, Smits K, Tolene RM, Illangasekare T (2014) Study of the effect of wind speed on evaporation from soil through integrated modeling of the atmospheric boundary layer and shallow subsurface. Water Resour Res 50:661–680. doi:10.1002/2013WR013952 CrossRefGoogle Scholar
  8. Davin EL, Seneviratne SI (2012) Role of land surface processes and diffuse/direct radiation partitioning in simulating the European climate. Biogeosciences 9(5):1695–1707. doi:10.5194/bg-9-1695-2012 CrossRefGoogle Scholar
  9. Fore A, Stiles B, Chau A, Williams B, Dunbar R, Rodriguez E (2014) Point-wise wind retrieval and ambiguity removal improvements for the QuikSCAT climatological data set. IEEE Trans Geosci Remote Sens 52(1):51–59. doi:10.1109/TGRS.2012.2235843 CrossRefGoogle Scholar
  10. Hastings DA, Dunbar PK, Elphingstone GM, Bootz M, Murakami H, Maruyama H, Masaharu H, Holland P, Payne J, Bryant NA, Logan TL, Muller JP, Schreier G, MacDonald JS (1999) The global land one-kilometer base elevation (GLOBE) digital elevation model, version 1.0. http://www.ngdc.noaa.gov/mgg/topo/globe.html
  11. Holton JR (2004) An introduction to dynamic meteorology, 4th edn. Academic Press, LondonGoogle Scholar
  12. Kraemer BM, Hook S, Huttula T, Kotilainen P, OReilly CM, Peltonen A, Plisnier PD, Sarvala J, Tamatamah R, Vadeboncoeur Y, Wehrli B, McIntyre PB (2015) Century-long warming trends in the upper water column of Lake Tanganyika. PLoS One 10(7):e0132,490. doi:10.1371/journal.pone.0132490 CrossRefGoogle Scholar
  13. Mironov DV, Heise E, Kourzeneva E, Ritter B, Schneider N, Terzhevik A (2010) Implementation of the lake parameterisation scheme Flake into the numerical weather prediction model COSMO. Boreal Environ Res 15:218–230Google Scholar
  14. Naithani J, Deleersnijder E, Plisnier PD (2002) Origin of intraseasonal variability in Lake Tanganyika. Geophys Res Lett 29(23):2093. doi:10.1029/2002GL015843 CrossRefGoogle Scholar
  15. Naithani J, Deleersnijder E, Plisnier P (2003) Analysis of wind-induced thermocline oscillations of Lake Tanganyika. Environ Fluid Mech 3:23–39CrossRefGoogle Scholar
  16. Nghiem SV, Leshkevich GA, Stiles BW (2004) Wind fields over the Great Lakes measured by the SeaWinds Scatterometer on the QuikSCAT Satellite. J Great Lakes Res 30(1):148–165. doi:10.1016/S0380-1330(04)70337-8 CrossRefGoogle Scholar
  17. Niang I, Ruppel O, Abdrabo M, Essel A, Lennard C, Padgham J, Urquhart P (2014) Africa. In: Barros V, Field C, Dokken D, Mastrandrea M, Mach K, Bilir T, Chatterjee M, Ebi K, Estrada Y, Genova R, Girma B, Kissel E, Levy A, MacCracken S, Mastrandrea P, White L (eds) Climate change 2014: impacts, adaptation, and vulnerability. Part B: Regional aspects. Contribution of working group II to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 1199–1265Google Scholar
  18. Nicholson S (1996) A review of climate dynamics and climate variability in Eastern Africa. In: Johnson T, Odada E (eds) The limnology, climatology and paleoclimatology of the East African lakes. Gordon and Breach, Amsterdam, pp 25–56Google Scholar
  19. Plisnier P, Chitamwebwa D, Mwape L, Tshibangu K, Langenberg V, Coenen E (1999) Limnological annual cycle inferred from physical-chemical fluctuations at three stations of Lake Tanganyika. Hydrobiologia 407:45–58CrossRefGoogle Scholar
  20. Reinecke PA, Durran DR (2008) Estimating topographic blocking using a Froude number when the static stability is nonuniform. J Atmos Sci 65:1035–1048CrossRefGoogle Scholar
  21. Savijärvi H (1997) Diurnal winds around Lake Tanganyika. Q J R Meteorol Soc 123:901–918CrossRefGoogle Scholar
  22. Savijärvi H, Järvenoja S (2000) Aspects of the fine-scale climatology over Lake Tanganyika as resolved by a mesoscale model. Meteorol Atmos Phys 73(1–2):77–88CrossRefGoogle Scholar
  23. Thiery W, Martynov A, Darchambeau F, Descy JP, Plisnier PD, Sushama L, van Lipzig NPM (2014) Understanding the performance of the FLake model over two African Great Lakes. Geosci Model Dev 7(1):317–337. doi:10.5194/gmd-7-317-2014 CrossRefGoogle Scholar
  24. Thiery W, Stepanenko VM, Fang X, Jöhnk KD, Li Z, Martynov A, Perroud M, Subin ZM, Darchambeau F, Mironov D (2014b) LakeMIP Kivu: Evaluating the representation of a large, deep tropical lake by a set of 1-dimensional lake models. Tellus A 66(21):390. doi:10.3402/tellusa.v66.21390 Google Scholar
  25. Thiery W, Davin E, Panitz HJ, Demuzere M, Lhermitte S, van Lipzig N (2015) The impact of the African Great Lakes on the regional climate. J Clim 28(10):4061–4085. doi:10.1175/JCLI-D-14-00565.1 CrossRefGoogle Scholar
  26. Tierney J, Mayes M, Meyer N (2010) Late-twentieth-century warming in Lake Tanganyika unprecedented since AD 500. Nat Geosci 3:422–425. doi:10.1038/NGEO865 CrossRefGoogle Scholar
  27. van Lipzig N, Marshall G, Orr A, King J (2008) The relationship between the southern hemisphere annular mode and Antarctic Peninsula summer temperatures: Analysis of a high-resolution model climatology. J Clim 21(8):1649–1668. doi:10.1175/2007JCLI1695.1 CrossRefGoogle Scholar
  28. Verburg P, Antenucci JP (2010) Persistent unstable atmospheric boundary layer enhances sensible and latent heat loss in a tropical great lake: Lake Tanganyika. J Geophys Res 115(D11):109. doi:10.1029/2009JD012839 CrossRefGoogle Scholar
  29. Verburg P, Hecky R (2003) Wind patterns, evaporation, and related physical variables in Lake Tanganyika, East Africa. J Great Lakes Res 29:48–61CrossRefGoogle Scholar
  30. Verburg P, Hecky R (2009) The physics of the warming of Lake Tanganyika by climate change. Limnol Oceanogr 54:2418–2430CrossRefGoogle Scholar
  31. Verburg P, Antenucci JP, Hecky RE (2011) Differential cooling drives large-scale convective circulation in Lake Tanganyika. Limnol Oceanogr 56(3):910–926. doi:10.4319/lo.2011.56.3.0910 CrossRefGoogle Scholar
  32. Wallace JM, Hobbs PV (2006) Atmospheric Science. Elsevier, PhiladelphiaGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • D. Docquier
    • 1
  • W. Thiery
    • 1
  • S. Lhermitte
    • 1
  • N. van Lipzig
    • 1
  1. 1.Department of Earth and Environmental SciencesK.U.LeuvenLouvainBelgium

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