Ocean Science Journal

The Korean Society of Oceanography (한국해양학회)
권호 표지

Nudging of Vertical Profiles of Meteorological Parameters in One-Dimensional Atmospheric Model: A Step Towards Improvements in Numerical Simulations

  • Subrahamanyam, D. Bala (Space Physics Laboratory, Vikram Sarabhai Space Centre) ;
  • Rani, S. Indira (Space Physics Laboratory, Vikram Sarabhai Space Centre) ;
  • Ramachandran, Radhika (ISRO Technical Liaison Unit, Embassy of India) ;
  • Kunhikrishnan, P. K. (Space Physics Laboratory, Vikram Sarabhai Space Centre)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this article, we describe a simple yet effective method for insertion of observational datasets in a mesoscale atmospheric model used in one-dimensional configuration through Nudging. To demonstrate the effectiveness of this technique, vertical profiles of meteorological parameters obtained from GLASS Sonde launches from a tiny island of Kaashidhoo in the Republic of Maldives are injected in a mesoscale atmospheric model - Advanced Regional Prediction System (ARPS), and model simulated parameters are compared with the available observational datasets. Analysis of one-time nudging in the model simulations over Kaashidhoo show that incorporation of this technique reasonably improves the model simulations within a time domain of +6 to +12 Hrs, while its impact on +18 Hrs simulations and beyond becomes literally null.

Keywords

References

  1. Anthes, R.A. 1983. A review of regional models of the atmosphere in middle latitudes. Mon. Weather Rev., 111, 1306-1335 https://doi.org/10.1175/1520-0493(1983)111<1306:RMOTAI>2.0.CO;2
  2. Moorthy, K.K. and S.K. Satheesh. 2001. Aerosol characteristics over minicoy: Evicence of influence of mineral dust transport. J. Mar. Atmos. Res., 2, 26-32
  3. Pielke, R.A. 1984. Mesoscale Meteorological Modeling. Academic Press Inc., Orlando, Florida
  4. Ramanathan, V., P. Crutzen, J. Lelieveld, A. Mitra, D. Althausen, J. Anderson, M. Andreae, W. Cantrell, G. Cass, C. Chung, A. Clarke, J. Coakley, W. Collins, W. Conant, F. Dulac, J. Heintzenberg, A. Heymsfield, B. Holben, S. Howell, J. Hudson, A. Jayaraman, J. Kiehl, T. Krishnamurti, D. Lubin, G. McFarquhar, T. Novakov, J. Ogren, I. Podgorny, K. Prather, K. Priestley, J. Prospero, P. Quinn, K. Rajeev, P. Rasch, S. Rupert, R. Sadourny, S. Satheesh, G. Shaw, P. Sheridan, and F. Valero. 2001. The Indian Ocean experiment: An integrated analysis of the climate forcing and effects of the great Indo-Asian haze. J. Geophys. Res., 106(D22), 28371-28398 https://doi.org/10.1029/2001JD900133
  5. Satheesh, S.K., V. Ramanathan, X. Li-Jones, J.M. Lobert, I.A. Podgorny, J.M. Prospero, B.N. Holben, and N.G. Loeb. 1999. A model for the natural and anthropogenic aerosols over the tropical Indian Ocean derived from Indian Ocean Experiment data. J. Geophys. Res., 104(D22), 27421-27440 https://doi.org/10.1029/1999JD900478
  6. Subrahamanyam, D.B. 2003. Observational and modelling studies of the marine atmospheric boundary layer over the tropical Indian Ocean during INDOEX. Ph.D. Thesis, Mahatma Gandhi University, India. 175 p
  7. Subrahamanyam, D.B., R. Radhika, and P.K. Kunhikrishnan. 2006. Improvements in simulations of atmospheric boundary layer parameters through data assimilation in ARPS mesoscale atmospheric model. p. 64040K1. In: Proc. SPIE, Remote sensing and modeling of atmosphere, oceans and interactions. Vol. 6404
  8. Xue, M., K.K. Droegemeier, V. Wong, A. Shapiro, and K. Brewster. 1995. ARPS version 4.0 User''s guide. CAPS, NSF, FAA, University of Oklahama, USA. 380 p