Articles | Volume 8, issue 6
Atmos. Meas. Tech., 8, 2531–2542, 2015
https://doi.org/10.5194/amt-8-2531-2015

Special issue: Observing Atmosphere and Climate with Occultation Techniques...

Atmos. Meas. Tech., 8, 2531–2542, 2015
https://doi.org/10.5194/amt-8-2531-2015

Research article 23 Jun 2015

Research article | 23 Jun 2015

Systematic evaluation of the impacts of GPSRO data on the prediction of typhoons over the northwestern Pacific in 2008–2010

Y.-C. Chen et al.

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Cited articles

Aparicio, J. M., Deblonde, G., Garand, L., and Laroche, S.: The signature of the atmospheric compressibility factor in COSMIC, CHAMP and GRACE radio occultation data, J. Geophys. Res., 114, D16144, https://doi.org/10.1029/2008JD011156, 2009.
Buontempo, C., Jupp, A., and Rennie, M. P.: Operational NWP assimilation of GPS radio occultation data, Atmos. Sci. Lett., 9, 129–133, 2008.
Chen, F. and Dudhia, J.: 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, 569–585, 2001.
Cucurull, L. and Derber, J. C.: Operational implementation of COSMIC observations into NCEP's global data assimilation system, Weather Forecast., 23, 702–711, 2008.
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Short summary
We systematically evaluated the impact of GPSRO data on typhoon track prediction over the Northwestern Pacific during 2008 to 2010. Specifically, we perform data assimilation and forecast experiments using the TWRF system at 45km resolution on 11 typhoons, with or without the use of GPSRO refractivity. The results indicate that the assimilation of GPSRO reduces the 72-hour track forecast errors by ~12km (5 %). Although this is only a modest improvement, it is statistically significant.