Evaluation of a nonlocal quasi-phase observation operator in assimilation of CHAMP radio occultation refractivity with WRF

Monthly Weather Review

Volumn 136, Issue 1, 2008, Pages 242-256

  Liu, Hui ^a,b   Anderson, Jeffrey ^a   Kuo, Ying Hwa ^a   Snyder, Chris ^a   Caya, Alain ^a  

^a NATIONAL CENTER FOR ATMOSPHERIC RESEARCH   (United States)

^b NONE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERIC TEMPERATURE; RADIOSONDES; REFRACTIVE INDEX; TROPOSPHERE; WATER VAPOR; WEATHER SATELLITES;

CHALLENGING MINISATELLITE PAYLOAD (CHAMP); RADIO OCCULTATION; SATELLITE CLOUD DRIFT WINDS;

WEATHER FORECASTING;

DATA ASSIMILATION; ENSEMBLE FORECASTING; RADIOSONDE; SATELLITE IMAGERY; TROPOSPHERE; WATER VAPOR; WEATHER FORECASTING;

EID: 39749203573     PISSN: 00270644     EISSN: None     Source Type: Journal    
DOI: 10.1175/2007MWR2042.1     Document Type: Article

References (21)

1. Anderson, J. L., 2001: An ensemble adjustment Kalman filter for data assimilation. Mon. Wea. Rev., 129, 2884-2903.
2. Anderson, J. L., 2003: A local least squares framework for ensemble filtering. Mon. Wea. Rev., 131, 634-642.
3. Foelsche, U., and G. Kirchengast, 2004: Sensitivity of GNSS occultation profiles to horizontal variability in the troposphere: A simulation study. Occultations for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, and A. K. Steiner, Eds., Springer-Verlag, 127-136.
4. Gaspari, G., and S. E. Cohn, 1999: Construction of correlation function in two and three dimensions. Quart. J. Roy. Meteor. Soc., 125, 723-757.
5. Healy, S. B., and J.-N. Thepaut, 2006a: Assimilation experiments with CHAMP GPS radio occultation measurements. Quart. J. Roy. Meteor. Soc., 132, 605-623.
6. Healy, S. B., J. R. Eyre, M. Hamrud, and J.-N. Thepaut, 2006b: Assimilating GPS radio occultation measurements with two-dimensional bending angle observation operators. EUMETSAT/ECMWF Fellowship Programme Research Rep. 16,19 pp.
7. Hollingsworth, A., and P. Lonnberg, 1986: The statistical structure of short-range forecast errors as determined from radiosonde data. Part I: The wind field. Tellus, 38A, 111-136.
8. Kuo, Y.-H., S. Sokolovskiy, R. Anthes, and F. Vandenberghe, 2000: Assimilation of GPS radio occultation data for numerical weather prediction. Terr. Atmos. Oceanic Sci., 11, 157-186.
9. Kuo, Y.-H., T.-K. Wee, S. Sokolovskiy, C. Rocken, W. Schreiner, D. Hunt, and R. A. Anthes, 2004: Inversion and error estimation of GPS radio occultation data. J. Meteor. Soc. Japan, 82, 507-531.
10. Kursinski, E. R., G. A. Hajj, K. R. Hardy, J. T. Shofield, and R. Linfied, 1997: Observing earth's atmosphere with radio occultation measurements using the Global Positioning System. J. Geophys. Res., 102, 23 429-23 465.
11. Liu, H., and X. Zou, 2003: Improvements to a GPS radio occultation ray-tracing model and their impacts on assimilation of bending angle. J. Geophys. Res., 108, 4548, doi:10.1029/2002JD003160.
12. Liu, H., J. Anderson, Y.-H. Kuo, and K. Raeder, 2007: Importance of forecast error multivariate correlations in idealized assimilations of GPS radio occultation data with the ensemble adjustment filter. Mon. Wea. Rev., 135, 173-185.
13. Poli, P., 2004: Effects of horizontal gradients on GPS radio occultation observation operators. II: A fast atmospheric refractivity gradient operator (FARGO). Quart. J. Roy. Meteor. Soc., 130, 2807-2825.
14. Rocken, C., Y.-H. Kuo, W. Schreiner, D. Hunt, S. Sokolovskiy, and C. McCormick, 2000: COSMIC system description. Terr. Atmos. Oceanic Sci., 11, 157-186.
15. Sokolovskiy, S., 2003: Effect of superrefraction on inversions of radio occultation signals in the lower troposphere. Radio Sci., 38, 1058, doi:10.1029/2002RS002728.
16. Sokolovskiy, S., Y.-H. Kuo, and W. Wang, 2005a: Evaluation of a linear phase observation operator with CHAMP radio occultation data and high-resolution regional analysis. Mon. Wea. Rev., 133, 3053-3059.
17. Sokolovskiy, S., Y.-H. Kuo, and W. Wang, 2005b: Assessing the accuracy of a linearized observation operator for assimilation of radio occultation data: Case simulations with a high-resolution weather model. Mon. Wea. Rev., 133, 2200-2212.
18. Syndergaard, S., E. R. Kursinski, B. M. Herman, E. M. Lane, and D. E. Flitter, 2005: A refractive index mapping operator for assimilation of occultation data. Mon. Wea. Rev., 133, 2650-2668.
19. Syndergaard, S., Y.-H. Kuo, and M. S. Lohmann, 2006: Observation operators for the assimilation of occultation data into atmospheric models: A review. Atmosphere and Climate: Studies by Occultation Methods, U. Foelsche, G. Kirchengast, and A. Steiner, Eds., Springer-Verlag, 205-244.
20. Ware, R., and Coauthors, 1996: GPS sounding of the atmosphere from low earth orbit: Preliminary results. Bull. Amer. Meteor. Soc., 77, 19-40.
21. Zou, X., and Coauthors, 1999: A ray-tracing operator and its adjoint for the use of GPS/MET refraction angle measurements. J. Geophys. Res., 104 (D18), 22 301-22 318.