Global 4DVAR assimilation and forecast experiments using AMSU observations over land. Part II: Impacts of assimilating surface-sensitive channels on the African monsoon during AMMA

Weather and Forecasting

Volumn 25, Issue 1, 2010, Pages 20-36

  Karbou, Fatima ^a   Rabier, Florence ^a   Lafore, Jean Philippe ^a   Redelsperger, Jean Luc ^a   Bock, Olivier ^b  

^a CENTRE NATIONAL DE RECHERCHES MÉTÉOROLOGIQUES   (France)

^b INSTITUT GÉOGRAPHIQUE NATIONAL   (France)

Author keywords

[No Author keywords available]

Indexed keywords

ADVANCED MICROWAVE SOUNDING UNIT-A; ASSIMILATION SYSTEM; ATMOSPHERIC FIELDS; ATMOSPHERIC OBSERVATIONS; CONTROL EXPERIMENTS; FEASIBILITY STUDIES; INDEPENDENT MEASUREMENT; LAND EMISSIVITY; LAND SURFACE; MONSOON SYSTEM; MULTI-DISCIPLINARY ANALYSIS; NORTHEAST AFRICA; OPERATIONAL MODEL; PRECIPITATION FORECAST; SATELLITE OBSERVATIONS; SAUDI ARABIA; SKIN TEMPERATURES; SOUTH AMERICA; WEST AFRICA;

ATMOSPHERIC HUMIDITY; ATMOSPHERIC THERMODYNAMICS; ELECTROMAGNETIC WAVE EMISSION; SOUNDING APPARATUS; SURFACE MEASUREMENT; TROPICS; WEATHER FORECASTING;

EXPERIMENTS;

ATMOSPHERIC MOISTURE; DATA ASSIMILATION; GPS; INTERTROPICAL CONVERGENCE ZONE; LAND SURFACE; LONG RANGE FORECAST; MONSOON; PRECIPITATION ASSESSMENT; RELATIVE HUMIDITY; SATELLITE IMAGERY;

INDIA; SAUDI ARABIA; SOUTH AMERICA; WEST AFRICA;

EID: 77953574242     PISSN: 08828156     EISSN: None     Source Type: Journal    
DOI: 10.1175/2009WAF2222244.1     Document Type: Article

References (15)

1. Bauer, P., 2009: 4D-Var assimilation of MERIS total column watervapour retrievals over land. Quart. J. Roy. Meteor. Soc., 135, 1852-1862.
2. Bauer, P., P. Lopez, A. Benedetti, D. Salmond, M. Bonazzola, and S. Saarinen, 2006a: Implementation of 1D 1 4D-Var assimilation of microwave radiances in precipitation at ECMWF. Part I: 4D-Var. Quart. J. Roy. Meteor. Soc., 132, 2277-2306.
3. Bauer, P., P. Lopez, A. Benedetti, D. Salmond, M. Bonazzola, and S. Saarinen, 2006b: Implementation of 1D 1 4D-Var assimilation of microwave radiances in precipitation at ECMWF. Part II: 4D-Var. Quart. J. Roy. Meteor. Soc., 132, 2307-2332.
4. Bock, O., M. N. Bouin, A. Walpersdorf, J.-P. Lafore, S. Janicot, F. Guichard, and A. Agusti-Panareda, 2007: Comparison of ground-basedGPS precipitable water vapour to in independent observations and NWP model reanalyses over Africa. Quart. J. Roy. Meteor. Soc., 133, 2011-2027.
5. Courtier, P., J. N. Thépaut, and A. Hollingsworth, 1994: A strategy for operational implementation of 4D-Var using an incremental approach. Quart. J. Roy. Meteor. Soc., 120, 1321-1387.
6. Grody, N. C., 1988: Surface identification using satellite microwave radiometers. IEEE Trans. Geosci. Remote Sens., 26, 850-859.
7. Karbou, F., E. Gérard, and F. Rabier, 2006: Microwave land emissivity and skin temperature for AMSU-a and -b assimilation over land. Quart. J. Roy. Meteor. Soc., 132, 2333-2355.
8. Karbou, F., E. Gérard, and F. Rabier, 2010: Global 4DVAR assimilation and forecast experiments using AMSU observations over land. Part I: Impacts of various land surface emissivity parameterizations. Wea. Forecasting, 25, 5-19.
9. Leroux, S., and N. M. J. Hall, 2009: On the relationship between African easterly waves and the African easterly jet. J. Atmos. Sci., 66, 2303-2316.
10. Liebmann, B., and C. A. Smith, 1996: Description of a complete (interpolated) outgoing longwave radiation dataset. Bull. Amer. Meteor. Soc., 77, 1275-1277.
11. Rabier, F., H. Jarvinen, E. Klinker, J. F. Mahfouf, and A. Simmons, 2000: The ECMWF operational implementation of fourdimentional variational assimilation. I: Experimental results with simplified physics. Quart. J. Roy. Meteor. Soc., 126, 1143- 1170.
12. Redelsperger, J.-L., C. Thorncroft, A. Diedhiou, T. Lebel, D. Parker, and J. Polcher, 2006: African Monsoon Multidisciplinary Analysis: An international research project and field campaign. Bull. Amer. Meteor. Soc., 87, 1739-1746.
13. Veersé, F., and J. N. Thépaut, 1998: Multiple truncation incremental approach for four-dimensional variational data assimilation. Quart. J. Roy. Meteor. Soc., 124, 1889-1908.
14. Weng, F., B. Yan, and N. Grody, 2001: A microwave land emissivity model. J. Geophys. Res., 106, 20 115-20 123.
15. Zhang, C., P. Woodworth, and G. Gu, 2006: The seasonal cycle in the lower troposphere over west Africa from sounding observations. Quart. J. Roy. Meteor. Soc., 132, 2561-2584.