Abstract
A number of simulations with the fourth release of the Rossby Center Regional Climate Model (RCA4) conducted within the COordinated Regional climate Downscaling EXperiment (CORDEX) framework for South Asia at 50 km horizontal resolution are evaluated for mean winter (December–March) and summer (June–September) climate during 1980–2005. The two driving data sets ERA-Interim reanalysis and the general circulation model EC-Earth have been analyzed besides the RCA4 simulations to address the added value. RCA4 successfully captures the mean climate in both the seasons. The biases in RCA4 appear to come from the driving data sets which are amplified after downscaling. The jet streams influencing the seasonal precipitation variability in both seasons are also analyzed. The spatial and quantitative analysis over CORDEX South Asia generally revealed the ability of RCA4 to capture the mean seasonal climate as well as the position and strength of the jet streams despite weak/strong jet representation in the driving data. The EC-Earth downscaled with RCA4 exhibited cold biases over the domain and a weak Somali jet over the Arabian Sea. Moreover, the moisture transport from the Arabian Sea during summer is pronounced in RCA4 simulations resulting in enhanced monsoon rainfall over northwestern parts of India. Both the Somali jet and the tropical easterly jet become stronger during strong summer monsoon years. However, there is robust impact of wet years in summer over the Somali jet. Wet-minus-dry composites in winter indicate strengthening (weakening) of the subtropical jet in RCA4 run by ERA-Interim (EC-Earth). The driving data have clear reflections on the RCA4 simulations.
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Abish B, Joseph PV, Johannessen OM (2013) Weakening trend of the tropical easterly jet stream of the boreal summer monsoon season 1950-2009. J Clim 26:9408–9414. doi:10.1175/JCLI-D-13-00440.1
Abish B, Joseph PV, Johannessen OM (2014) Climate change in the subtropical jetstream during 1950–2009. Adv Atmos Sci 32:140–148. doi:10.1007/s00376-014-4156-6
Adam JC (2003) Adjustment of global gridded precipitation for systematic bias. J Geophys Res 108:4257. doi:10.1029/2002JD002499
Ajayamohan RS, Merryfield WJ, Kharin VV (2010) Increasing trend of synoptic activity and its relationship with extreme Rain Events over Central India. J Clim 23:1004–1013. doi:10.1175/2009JCLI2918.1
Archer CL, Caldeira K (2008) Historical trends in the jet streams. Geophys Res Lett 35:L08803. doi:10.1029/2008GL033614
Bluestein HB (1992) Synoptic–Dynamic Meteorology in Midlatitudes. Oxford University Press, UK
Bunkar AF (1965) Interaction of summer monsoon air with the Arabian Sea. In: Proc. Symp. on Met. Results, IIOE, Bombay. Bombay, India, pp 3–16
Cadet D, Reverdin G (1981) Water vapour transport over the Indian Ocean during summer 1975. Tellus A 33:476–487. doi:10.3402/tellusa.v33i5.10737
Dash SK, Mishra SK, Pattnayak KC, et al. (2014a) Projected seasonal mean summer monsoon over India and adjoining regions for the twenty-first century. Theor Appl Climatol 122:581–593. doi:10.1007/s00704-014-1310-0
Dash SK, Pattnayak KC, Panda SK, et al. (2014b) Impact of domain size on the simulation of Indian summer monsoon in RegCM4 using mixed convection scheme and driven by HadGEM2. Clim Dyn 44:961–975. doi:10.1007/s00382-014-2420-1
Dee DP, Uppala SM, Simmons AJ, et al. (2011) The ERA-interim reanalysis: configuration and performance of the data assimilation system. Q J R Meteorol Soc 137:553–597. doi:10.1002/qj.828
Desai BN, Rangachari N, Subramanian SK (1976) Structure of low-level jet stream over the Arabian Sea and the peninsula as revealed by observations in June and July during the monsoon experiment (MONEX) 1973 and its probable origin. Indian J Meteorol Hydrol Geophys 27:263–274
Dimri AP, Mohanty UC (2009) Simulation of mesoscale features associated with intense western disturbances over Western Himalayas. Meteorol Appl 16:289–308. doi:10.1002/met.117
Dube SK, Luther ME, O’Brien JJ (1990) Relationships between interannual variability in the Arabian Sea and Indian summer monsoon rainfall. Meteorog Atmos Phys 44:153–165. doi:10.1007/BF01026816
Elguindi N, Giorgi F, Turuncoglu U (2013) Assessment of CMIP5 global model simulations over the subset of CORDEX domains used in the phase I CREMA. Clim Chang 125:7–21. doi:10.1007/s10584-013-0935-9
Endris HS, Omondi P, Jain S, et al. (2013) Assessment of the performance of CORDEX regional climate models in simulating East African rainfall. J Clim 26:8453–8475. doi:10.1175/JCLI-D-12-00708.1
Findlater J (1966) Cross-equatorial jet streams at low level over Kenya. Meteorol Mag 95:353–364
Galvin JFP (2007) The weather and climate of the tropics part 1-setting the scene. Weather 62:245–251. doi:10.1002/wea.53
Ghimire S, Choudhary A, Dimri AP (2015) Assessment of the performance of CORDEX-South Asia experiments for monsoonal precipitation over the Himalayan region during present climate: part I. Clim Dyn. doi:10.1007/s00382-015-2747-2
Giorgi F, Lionello P (2008) Climate change projections for the Mediterranean region. Glob Planet Change 63:90–104. doi:10.1016/j.gloplacha.2007.09.005
Giorgi F, Jones C, Asrar GR (2009) Addressing climate information needs at the regional level: the CORDEX framework. Bull-World Meteorol Organ 58:175–183
Halpern D, Woiceshyn PM (2001) Somali jet in the Arabian Sea, El Ni??o, and India rainfall. J Clim 14:434–441. doi:10.1175/1520-0442(2001)014<0434:SJITAS>2.0.CO;2
Hassan M, Du P, Jia S, et al. (2015) An assessment of the South Asian Summer Monsoon Variability for present and future climatologies using a high resolution regional climate model (RegCM4.3) under the AR5 scenarios. Atmosphere (Basel) 6:1833–1857. doi:10.3390/atmos6111833
Hatwar HR, Yadav BP, Rama Rao YV (2005) Prediction of western disturbances and associated weather over western Himalayas. Curr Sci 88:913–920
Hazeleger W, Wang X, Severijns C, et al. (2011) EC-earth V2.2: description and validation of a new seamless earth system prediction model. Clim Dyn 39:2611–2629. doi:10.1007/s00382-011-1228-5
Houghton JT, Ding Y, Griggs DJ, et al (2001) Climate Change 2001: The Scientific Basis. Cambridge University Press, Cambridge and New York
IPCC, Stocker T, Qin D, et al (2013) The physical science basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change
Iqbal W, Rasul G (2011) Downscaling ability of PRECIS over snow-covered areas of Pakistan. Pak J Meteorol 14(7):45–51
Jacob D, Bärring L, Christensen OB, et al. (2007) An inter-comparison of regional climate models for Europe: model performance in present-day climate. Clim Chang 81:31–52. doi:10.1007/s10584-006-9213-4
Jones CG, Wyser K, Ullerstig A, Willén U (2004) The Rossby Centre regional atmospheric climate model part II: application to the Arctic climate. Ambio 33:211–220
Joseph PV, Sijikumar S (2004) Intraseasonal variability of the low-level jet stream of the Asian summer monsoon. J Clim 17:1449–1458
Joseph PV, Simon A (2005) Weakening trend of the southwest monsoon current through peninsular India from 1950 to the present. Curr Sci 89:687–694
Kalapureddy MCR, Rao DN, Jain AR, Ohno Y (2007) Wind profiler observations of a monsoon low-level jet over a tropical Indian station. Ann Geophys 25:2125–2137. doi:10.5194/angeo-25-2125-2007
Kriezi EE, Broman B (2008) Past and future wave climate in the Baltic Sea produced by the SWAN model with forcing from the regional climate model RCA of the Rossby Centre. In: 2008 IEEE/OES US/EU-Baltic International Symposium. IEEE, pp 1–7
Krishnakumar KN, Prasada Rao GSLHV, Gopakumar CS (2009) Rainfall trends in twentieth century over Kerala, India. Atmos Environ 43:1940–1944. doi:10.1016/j.atmosenv.2008.12.053
Krishnamurti TN (1961) The subtropical jet stream of winter. J Meteorol 18:172–191. doi:10.1175/1520-0469(1961)
Liang X-Z, Kunkel KE, Samel AN (2001) Development of a regional climate model for U.S. Midwest Applications. Part I: sensitivity to Buffer Zone Treatment. J Clim 14:4363–4378. doi:10.1175/1520-0442(2001)
Maharana P, Dimri AP (2015) Study of intraseasonal variability of Indian summer monsoon using a regional climate model. Clim Dyn. doi:10.1007/s00382-015-2631-0
Mishra V, Kumar D, Ganguly AR, et al. (2014) Reliability of regional and global climate models to simulate precipitation extremes over India. J Geophys Res Atmos 119:9301–9323. doi:10.1002/2014JD021636
Mitchell TD, Jones PD (2005) An improved method of constructing a database of monthly climate observations and associated high-resolution grids. Int J Climatol 25:693–712. doi:10.1002/joc.1181
Mokashi RY (1974) The Axis of the tropical easterly jet stream over India and Ceylon. Indian J Meteorol Geophys 25:55–68
Moss RH, Edmonds JA, Hibbard KA, et al. (2010) The next generation of scenarios for climate change research and assessment. Nature 463:747–756. doi:10.1038/nature08823
Pant GB, Kumar KR (1997) Climates of South Asia. J. Wiley and Sons (Chichester)
Rao BRS, Rao DVB, Rao VB (2004) Decreasing trend in the strength of tropical easterly jet during the Asian summer monsoon season and the number of tropical cyclonic systems over Bay of Bengal. Geophys Res Lett 31:L14103. doi:10.1029/2004GL019817
Rummukainen M (2010) State-of-the-art with regional climate models. Wiley Interdiscip Rev Clim Chang 1:82–96. doi:10.1002/wcc.8
Rummukainen M, Räisänen J, Bringfelt B, et al. (2001) A regional climate model for Northern Europe: model description and results from the downscaling of two GCM control simulations. Clim Dyn 17:339–359. doi:10.1007/s003820000109
Samuelsson P, Jones CG, Willén U, et al. (2011) The Rossby Centre regional climate model RCA3: model description and performance. Tellus, Ser A Dyn Meteorol Oceanogr 63:4–23. doi:10.1111/j.1600-0870.2010.00478.x
Sandeep S, Ajayamohan RS (2014) Poleward shift in Indian summer monsoon low level jetstream under global warming. Clim Dyn. doi:10.1007/s00382-014-2261-y
Sinha P, Mohanty UC, Kar SC, Kumari S (2013) Role of the Himalayan Orography in Simulation of the Indian Summer Monsoon using RegCM3. Pure Appl Geophys 171:1385–1407. doi:10.1007/s00024-013-0675-9
Strandberg G, Kjellström E, Poska A, et al. (2014) Regional climate model simulations for Europe at 6 and 0.2 k BP: sensitivity to changes in anthropogenic deforestation. Clim Past 10:661–680. doi:10.5194/cp-10-661-2014
G Strandberg, L Bärring, U Hansson, C Jansson, C Jones, E Kjellström, M Kolax, M Kupiainen, G Nikulin, et al (2015) CORDEX Scenarios for Europe from the Rossby Centre Regional Climate Model RCA4
Suh M, Oh S (2015) Impacts of boundary conditions on the simulation of atmospheric fields using RegCM4 over CORDEX east Asia. Atmosphere (Basel) 6:783–804. doi:10.3390/atmos6060783
Syed FS, Giorgi F, Pal JS, et al. (2006) Effect of remote forcings on the winter precipitation of central southwest Asia part 1: observations. Theor Appl Climatol 86:147–160
Syed FS, Yoo JH, Körnich H, Kucharski F (2010) Are intraseasonal summer rainfall events micro monsoon onsets over the western edge of the South-Asian monsoon? Atmos Res 88:341–346
Syed FS, Körnich H, Tjernström M (2012) On the fog variability over South Asia. Clim Dyn 39:2993–3005. doi:10.1007/s00382-012-1414-0
Syed FS, Iqbal W, Syed AAB, Rasul G (2014) Uncertainties in the regional climate models simulations of South-Asian summer monsoon and climate change. Clim Dyn 42:2079–2097. doi:10.1007/s00382-013-1963-x
Taylor KE (2001) Summarizing multiple aspects of model performance in a single diagram. J Geophys Res 106:7183. doi:10.1029/2000JD900719
Taylor KE, Stouffer RJ, Meehl GA (2012) An overview of CMIP5 and the experiment design. Bull Am Meteorol Soc 93:485–498. doi:10.1175/BAMS-D-11-00094.1
Tiwari PR, Kar SC, Mohanty UC, et al. (2015) Simulations of tropical circulation and Winter Precipitation Over North India: an application of a tropical band version of regional climate model (RegT-band). Pure Appl Geophys. doi:10.1007/s00024-015-1102-1
Tourigny E, Jones C (2009) An analysis of regional climate model performance over the tropical Americas. Part I : simulating seasonal variability of precipitation associated with ENSO forcing. Tellus. Ser. A. Dyn Meteorol Oceanogr 61:323–342
Undén P, Rontu L, Järvinen H, et al. (2002) HIRLAM-5 scientific documentation. Environ Geol 43:144. doi:10.1007/s00254-002-0712-y
Yang H, Wang B (2011) Reduction of systematic biases in regional climate downscaling through ensemble forcing. Clim Dyn 38:655–665. doi:10.1007/s00382-011-1006-4
Acknowledgments
Two anonymous reviewers provided constructive comments that helped to improve this manuscript. The South Asia CORDEX simulations were accomplished within the IMPACT2C project with funding from the European Union’s seventh Framework Program (FP7/2007-2013) under grant agreement 282746.We acknowledge the EC-Earth consortium for providing boundary conditions to RCA4. The EC-Earth simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputing Centre (SNC).
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Iqbal, W., Syed, F.S., Sajjad, H. et al. Mean climate and representation of jet streams in the CORDEX South Asia simulations by the regional climate model RCA4. Theor Appl Climatol 129, 1–19 (2017). https://doi.org/10.1007/s00704-016-1755-4
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DOI: https://doi.org/10.1007/s00704-016-1755-4