Abstract
This paper presents an evaluation of the Weather Research and Forecasting (WRF) model in simulating wet and dry West African monsoon (WAM) rainfall seasons. Three model experiments with varying selected microphysics (MP), cumulus convection (CU), and planetary boundary layer (PBL) schemes based on previous study were performed. Each of the model combinations is used to run four WAM seasons that consist of two wet (2008 and 2010) and two dry years (2001 and 2011). To investigate the behavior of WAM in the context of wet and dry years, the four seasons were used to compute composites of wet and dry WAM seasons in terms of rainfall amount. The analyses majorly focus on the rainfall composites relative to rainfall from Global Precipitation Climatology Project (GPCP) and Tropical Rainfall Measurement Mission (TRMM) as well as temperature, moisture, and atmospheric circulation fields with respect to NCEP reanalyses. This study documents significant sensitivity in simulation of the West African monsoon to the choices of the MP, CU, and PBL schemes. The simulation with the combination of WRF single moment 5 (WSM5) MP, Yonsei University (YSU) PBL, and new Simplified Arakawa-Schubert CU (WSM5-YSU-nSAS) shows good spatial distribution pattern of rainfall and the dynamics associated with the monsoon. Quantitatively, the combination shows less agreement in distinguishing the selected WAM seasons compared with the Goddard MP, Mellor-Yamada-Janjic PBL, and Betts-Miller-Janjić CU (GD-MYJ-BMJ) and the WSM5, Mellor-Yamada-Nakanishi-Niino 2.5 level and new Tiedtke CU (WSM5-MYNN-nTDK). Also, the dynamical structures of the wet and dry WAM circulation composites are reasonably reproduced in GD-MYJ-BMJ and WSM5-YSU-nSAS. The GD-MYJ-BMJ was able to distinguish between wet and dry years and thus underscores its potential to reproduce climate change signals in future work.
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References
Abiodun BJ, Salami AT, Matthew OJ, Odedokun S (2013) Potential impacts of afforestation on climate change and extreme events in Nigeria. Clim Dyn 41(2):277–293. https://doi.org/10.1007/s00382-012-1523-9
Afiesimama EA, Pal JS, Abiodun BJ, Gutowski WJ, Adedoyin A (2006) Simulation of West African monsoon using the RegCM3. Part I: model validation and interannual variability. Theor Appl Climatol 86(1–4):23–37
Akinsanola AA, Ogunjobi KO, Gbode IE, Ajayi VO (2015) Assessing the capabilities of three regional climate models over CORDEX Africa in simulating west African summer monsoon precipitation. Adv Meteorol 2015, Article ID 935431, https://doi.org/10.1155/2015/935431
Akinsanola AA, Ogunjobi KO (2017) Evaluation of present-day rainfall simulations over West Africa in CORDEX regional climate models. Environ Earth Sci 76:366. https://doi.org/10.1007/s12665-017-6691-9
Akinsanola AA, Ajayi VO, Adejare AT, Adeyeri OE, Gbode IE, Ogunjobi KO, Nikulin G, Abolude AT (2018) Evaluation of rainfall simulations over West Africa in dynamically downscaled CMIP5 global circulation models. Theor Appl Climatol 132(1–2):437–450
Akinsanola AA, Zhou W (2018) Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel. Clim Dyn 52:4501–4514. https://doi.org/10.1007/s00382-018-4394-x
Baines PG, Folland CK (2007) Evidence for rapid global climate shift across the late 1960s. J Clim 20:2721–2744. https://doi.org/10.1175/JCLI4177.1
Burpee RW (1972) The origin and structure of easterly waves in the lower troposphere in North Africa. J Atmos Sci 29:77–90
Charney JG, Quirk WJ, Chow SH, Korn eld J (1977) A compara- tive study of the e ects of albedo change on drought in semi-arid regions. J Atmos Sci 34:1366–1385
Chen F, Dudhia J (2001) Coupling an advanced land surface–hydrology model with the Penn State–NCAR MM5 modeling system. Part I: model implementation and sensitivity. Mon Weather Rev 129(4):569–585
Christensen JH, Hewitson B, Busuioc A, Chen A, Gao X, Held I, Jones R, Kolli RK, Kwon WT, Laprise R, Rueda VM, Mearns L, Menéndez CG, Räisänen J, Rinke A, Sarr A, Whetton P (2007) Regional climate projections, in: climate change: the physical sci- ence basis. Contribution of working group I to the fourth assess- ment report of the inter-governmental panel on climate change. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tig-nor M, Miller HL, Cambridge University Press, Cambridge
Cook KH (1999) Generation of the African easterly jet and its role in determining West African precipitation. J Clim 12(5):1165–1184
Dee DP, Uppala SM, Simmons AJ, Berrisford P, Poli P, Kobayashi S, Andrae U, Balmaseda MA, Balsamo G, Bauer DP, Bechtold P (2011) The ERA-interim reanalysis: configuration and performance of the data assimilation system. Q J Roy Meteor Soc 137(656):553–597
Dezfuli AK, Nicholson SE (2011) A note on long-term variations of the African easterly jet. Int J Climatol 31(13):2049–2054
Eltahir EA, Gong C (1996) Dynamics of wet and dry years in West Africa. J Clim 9(5):1030–1042
Eltahir EA (1998) A soil moisture–rainfall feedback mechanism: 1. Theory and observations. Water Resour Res 34(4):765–776
Findell KL, Eltahir EA (2003) Atmospheric controls on soil moisture–boundary layer interactions. Part I: framework development. J Hydrometeorol 4(3):552–569
Flaounas E, Bastin S, Janicot S (2011) Regional climate modelling of the 2006 West African monsoon: sensitivity to convection and planetary boundary layer parameterisation using WRF. Clim Dyn 36(5–6):1083–1105
Gallée H, Moufouma-Okia W, Bechtold P, Brasseur O, Dupays I, Marbaix P, Messager C, Ramel R, Lebel T (2004) A high-resolution simulation of a West African rainy season using a regional climate model. J Geophys Res Atmos 109(D5)
Gbode IE, Dudhia J, Ogunjobi KO, Ajayi VO (2018) Sensitivity of different physics schemes in the WRF model during a West African monsoon regime. Theor Appl Climatol 136:1–19. https://doi.org/10.1007/s00704-018-2538-x
Grist JP, Nicholson SE (2001) A study of the dynamic factors influencing the rainfall variability in the West African Sahel. J Clim 14(7):1337–1359
Hagos SM, Cook KH (2007) Dynamics of the West African monsoon jump. J Clim 20(21):5264–5284
Hagos S, Leung LR, Xue Y, Boone A, de Sales F, Neupane N, Huang M, Yoon JH (2014) Assessment of uncertainties in the response of the African monsoon precipitation to land use change simulated by a regional model. Clim Dyn 43(9–10):2765–2775
Han J, Pan HL (2011) Revision of convection and vertical diffusion schemes in the NCEP global forecast system. Weather Forecast 26(4):520–533
Hernández-Díaz L, Laprise R, Sushama L, Martynov A, Winger K, Dugas B (2013) Climate simulation over CORDEX Africa domain using the fifth-generation Canadian Regional Climate Model (CRCM5). Clim Dyn 40(5–6):1415–1433
Hong SY, Dudhia J, Chen SH (2004) A revised approach to ice microphysical processes for the bulk parameterization of clouds and precipitation. Mon Weather Rev 132(1):103–120
Hong SY, Noh Y, Dudhia J (2006) A new vertical diffusion package with an explicit treatment of entrainment processes. Mon Weather Rev 134(9):2318–2341
Huffman GJ, Bolvin DT, Nelkin EJ, Wolff DB, Adler RF, Gu G, Hong Y, Bowman KP, Stocker EF (2007) The TRMM multisatellite precipitation analysis (TMPA): quasi-global, multiyear, combined-sensor precipitation estimates at fine scales. J Hydrometeorol 8(1):38–55
Huffman GJ, Adler RF, Bolvin DT, Gu G (2009) Improving the global precipitation record: GPCP version 2.1. Geophys Res Lett 36(17). https://doi.org/10.1029/2009GL040000
Huffman GJ, Bolvin DT, Adler RF (2016) GPCP version 1.2 one-degree daily precipitation data set. Research data archive at the National Center for Atmospheric Research, computational and information systems laboratory. doi:https://doi.org/10.5065/D6D50K46
Hulme M (1992) Rainfall changes in Africa: 1931–1960 to 1961–1990. Int J Climatol 12(7):685–699
Iacono MJ, Delamere JS, Mlawer EJ, Shephard MW, Clough SA, Collins WD (2008) Radiative forcing by long-lived greenhouse gases: calculations with the AER radiative transfer models. J Geophys Res Atmos 113(D13)
Iloeje NP (1981) A new geography of Nigeria. Longman, UK
Im ES, Gianotti RL, Eltahir EA (2014) Improving the simulation of the West African monsoon using the MIT regional climate model. J Clim 27(6):2209–2229
IPCC (2001) Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. In: Houghton JT, Ding Y, Griggs DJ, Noquer M, van der Linden PJ, Dai X, Maskell K, Johnson CA (eds) . Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, p 881
IPCC (2007) Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds) . Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, p 996
Janjić ZI (1994) The step-mountain eta coordinate model: further developments of the convection, viscous sublayer, and turbulence closure schemes. Mon Weather Rev 122(5):927–945
Janjić ZI (2000) Comments on “development and evaluation of a convection scheme for use in climate models”. J Atmos Sci 57(21):3686–3686
Jones PW (1999) First-and second-order conservative remapping schemes for grids in spherical coordinates. Mon Weather Rev 127(9):2204–2210
Hoegh-Guldberg O, Jacob D, Taylor M, Bindi M, Brown S, Camilloni I, Diedhiou A, Djalante R, Ebi KL, Engelbrecht F, Guiot J, Hijioka Y, Mehrotra S, Payne A, Seneviratne SI, Thomas A, Warren R, Zhou G (2018) Impacts of 1.5 °C Global Warming on Natural and Human Systems. In: Global Warming of 1.5 °C. An IPCC Special Report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty. In: Masson-Delmotte, V. P. Zhai, H.-O. Pörtner, D. Roberts, J. Skea, P.R. Shukla, A. Pirani, W. Moufouma-Okia, C. Péan, R. Pidcock, S. Connors, J.B.R. Matthews, Y. Chen, X. Zhou, M.I. Gomis, E. Lonnoy, T. Maycock, M. Tignor, and T. Waterfield (eds). In Press
Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woollen J, Zhu Y (1996) The NCEP/NCAR 40-year reanalysis project. BAMS 77(3):437–472
Kanamitsu M, Kumar A, Juang HMH, Schemm JK, Wang W, Yang F, Hong SY, Peng P, Chen W, Moorthi S, Ji M (2002b) NCEP dynamical seasonal forecast system 2000. BAMS 83(7):1019–1038
Klein C, Heinzeller D, Bliefernicht J, Kunstmann H (2015) Variability of West African monsoon patterns generated by a WRF multi-physics ensemble. Clim Dyn 45(9–10):2733–2755
Klutse NAB, Sylla MB, Diallo I, Sarr A, Dosio A, Diedhiou A, Kamga A, Lamptey B, Ali A, Gbobaniyi EO, Owusu K, Lennard C, Hewitson B, Nikulin G, Panitz HJ, Büchner M (2014) Daily characteristics of West African summer monsoon precipitation in CORDEX simulations. Theor Appl Climatol 123:369–386. https://doi.org/10.1007/s00704-014-1352-3
Le Barbé L, Lebel T, Tapsoba D (2002) Rainfall variability in West Africa during the years 1950–90. J Clim 15(2):187–202
Lebel T, Diedhiou A, Laurent H (2003) Seasonal cycle and interannual variability of the Sahelian rainfall at hydrological scales. J Geophys Res Atmos, 108(D8)
Li R, Jin J, Wang SY, Gillies RR (2015) Significant impacts of radiation physics in the weather research and forecasting model on the precipitation and dynamics of the West African monsoon. Clim Dyn 44(5–6):1583–1594
Kanamitsu M, Ebisuzaki W, Woollen J, Yang S-K, Hnilo JJ, Fiorino M, Potter GL (2002) National Center for Environmental Predictions-Department of Energy (NCEP-DOE) Atmospheric Model Intercomparison Project (AMIP-II) Reanalysis-2. BAMS 11:1631–1643
Nakanishi M, Niino H (2004) An improved Mellor–Yamada level-3 model with condensation physics: its design and verification. Bound-Layer Meteorol 112(1):1–31
Nakanishi M, Niino H (2006) An improved Mellor–Yamada level-3 model: its numerical stability and application to a regional prediction of advection fog. Bound-Layer Meteorol 119(2):397–407
NCEP FNL (2000) National Centers for Environmental Prediction/National Weather Service/ NOAA/U.S. Department of Commerce (2000) updated daily. NCEP FNL Operational Model Global Tropospheric Analyses, continuing from July 1999. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6M043C6. Accessed 09 March 2017
Newell RE, Kidson JW (1984) African mean wind changes between Sahelian wet and dry periods. J Climatol 4(1):27–33
Nicholson SE (1989) Long-term changes in African rainfall. Weather 44(2):46–56
Nicholson SE, Grist JP (2003) The seasonal evolution of the atmospheric circulation over West Africa and equatorial Africa. J Clim 16(7):1013–1030
Nicholson SE (2009) A revised picture of the structure of the “monsoon” and land ITCZ over West Africa. Clim Dyn 32(7–8):1155–1171
Nicholson SE (2013) The West African Sahel: a review of recent studies on the rainfall regime and its interannual variability. ISRN Meteor 2013. https://doi.org/10.1155/2013/453521
Nikulin G, Jones C, Giorgi F, Asrar G, Büchner M, Cerezo-Mota R, Christensen OB, Déqué M, Fernandez J, Hänsler A, van Meijgaard E (2012) Precipitation climatology in an ensemble of CORDEX-Africa regional climate simulations. J Clim 25(18):6057–6078
Noble E, Druyan LM, Fulakeza M (2014) The sensitivity of WRF daily summertime simulations over West Africa to alternative parameterizations. Part I: African wave circulation. Mon Weather Rev 142(4):1588–1608
Noble E, Druyan LM, Fulakeza M (2017) The sensitivity of WRF daily summertime simulations over West Africa to alternative parameterizations. Part II: precipitation. Mon Weather Rev 145(1):215–233
Omotosho JB, Abiodun BJ (2007) A numerical study of moisture build-up and rainfall over West Africa. Meteorol Appl 14(3):209–225. https://doi.org/10.1002/met.11
Prein AF, Gobiet A, Suklitsch M, Truhetz H, Awan NK, Keuler K, Georgievski G (2013) Added value of convection permitting sea- sonal simulations. Clim Dyn 41:2655–2677
Schneider U, Becker A, Finger P, Meyer-Christoffer A, Ziese M, Rudolf B (2014) GPCC’s new land surface precipitation climatology based on quality-controlled in situ data and its role in quantifying the global water cycle. Theor Appl Climatol 115(1–2):15–40
Sultan B, Janicot S (2000) Abrupt shift of the ITCZ over West Africa and intraseasonal variability. Geophys Res Lett 27(20):3353–3356
Sultan B, Janicot S (2003) The West African monsoon dynamics. Part II: the “preonset” and “onset” of the summer monsoon. J Clim 16(21):3407–3427
Sylla MB, Gaye AT, Pal JS, Jenkins GS, Bi XQ (2009) High-resolution simulations of West African climate using regional climate model (RegCM3) with different lateral boundary conditions. Theor Appl Climatol 98(3–4):293–314
Sylla MB, Coppola E, Mariotti L, Giorgi F, Ruti PM, Dell’Aquila A, Bi X (2010a) Multiyear simulation of the African climate using a regional climate model (RegCM3) with the high resolution ERA-Interim reanalysis. Clim Dyn 35:231–247. https://doi.org/10.1007/s00382-009-0613-9
Sylla MB, Dell’Aquila A, Ruti PM, Giorgi F (2010b) Simulation of the intraseasonal and the interannual variability of rainfall over West Africa with RegCM3 during the monsoon period. Int J Climatol 30:1865–1883. https://doi.org/10.1002/joc.2029
Sylla MB, Giorgi F, Coppola E, Mariotti L (2013) Uncertainties in daily rainfall over Africa: assessment of gridded observation products and evaluation of a regional climate model simulation. Int J Climatol 33(7):1805–1817. https://doi.org/10.1002/joc.3551
Tao WK, Simpson J, McCumber M (1989) An ice-water saturation adjustment. Mon Weather Rev 117(1):231–235
Tiedtke MICHAEL (1989) A comprehensive mass flux scheme for cumulus parameterization in large-scale models. Mon Weather Rev 117(8):1779–1800
Thorncroft CD, Blackburn M (1999) Maintenance of the African easterly jet. Q J Roy Meteor Soc 125(555):763–786
Thorncroft CD, Parker DJ, Burton RR, Diop M, Ayers JH, Barjat H, Devereau S, Diongue A, Dumelow R, Kindred DR, Price NM (2003) The JET2000 project: aircraft observations of the African easterly jet and African easterly waves: aircraft observations of the African easterly jet and African easterly waves. BAMS 84(3):337–352
Thorncroft CD, Nguyen H, Zhang C, Peyrillé P (2011) Annual cycle of the West African monsoon: regional circulations and associated water vapour transport. Q J Roy Meteor Soc 137(654):129–147
Ulate M, Dudhia J, Zhang C (2014) Sensitivity of the water cycle over the Indian Ocean and maritime continent to parameterized physics in a regional model. J Adv Model Earth Sys 6:1095–1120. https://doi.org/10.1002/2014MS000313
Xue Y, De Sales F, Lau WM, Boone A, Feng J, Dirmeyer P, Guo Z, Kim KM, Kitoh A, Kumar V, Poccard-Leclercq I (2010) Intercomparison and analyses of the climatology of the West African monsoon in the West African Monsoon Modeling and Evaluation project (WAMME) first model intercomparison experiment. Clim Dyn 35(1):3–27
Zaroug MA, Sylla MB, Giorgi F, Eltahir EA, Aggarwal PK (2013) A sensitivity study on the role of the swamps of southern Sudan in the summer climate of North Africa using a regional climate model. Theor Appl Climatol 113(1–2):63–81
Zhang C, Wang Y, Hamilton K (2011) Improved representation of boundary layer clouds over the Southeast Pacific in ARW-WRF using a modified Tiedtke cumulus parameterization scheme. Mon Weather Rev 139(11):3489–3513
Acknowledgments
Many thanks to NCAR’s MMM Laboratory for supporting the research work. We would like to acknowledge high-performance computing support from Cheyenne (doi: https://doi.org/10.5065/D6RX99HX) provided by NCAR’s Computational and Information Systems Laboratory, sponsored by the National Science Foundation. Also, thanks to the anonymous reviewers for the insightful comments and suggestions that helped to improve the quality of the paper.
Funding
The German Federal Ministry of Education and Research (BMBF) primarily funded this research through the Doctorate Research Programme-West African Climate System (DRP-WACS) hosted in the Federal University of Technology Akure (FUTA), Ondo State, Nigeria.
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Gbode, I.E., Ogunjobi, K.O., Dudhia, J. et al. Simulation of wet and dry West African monsoon rainfall seasons using the Weather Research and Forecasting model. Theor Appl Climatol 138, 1679–1694 (2019). https://doi.org/10.1007/s00704-019-02912-x
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DOI: https://doi.org/10.1007/s00704-019-02912-x