DOI QR코드

DOI QR Code

Combined Microwave Radiometer and Micro Rain Radar for Analysis of Cloud Liquid Water

  • Yang, Ha-Young (National Institute of Meteorological Research, Korea Meteorological Administration) ;
  • Chang, Ki-Ho (National Typhoon Center, Meteorological Administration) ;
  • Kang, Seong-Tae (Department of Atmospheric Science, Graduate School, Chosun University)
  • Received : 2013.02.07
  • Accepted : 2013.03.25
  • Published : 2013.03.30

Abstract

To combine the micro rain radar and microwave radiometer cloud liquid water, we estimate the cloud physical thickness from the difference between the MTSAT-1R cloud top height and cloud base height of visual observation of Daegwallyeong weather station, and the cloud liquid water path of micro rain radar is obtained by multiplying the liquid water content of micro rain radar and the estimated cloud physical thickness. The trend of microwave radiometer liquid water path agrees with that of the micro rain radar during small precipitation. We study these characteristics of micro rain radar and microwave radiometer for small precipitation to obtain the combined cloud water content of micro rain radar and microwave radiometer, constantly operated regardless to the rainfall.

Keywords

References

  1. R. D. Cess, G. L. Potter, J. P. Blanchet, G. J. Boer, A. D. Del Genio, M. Deque, V. Dymnikov, V. Galin, W. L. Gates, S. J. Ghan, J. T. Kiehl, A. A. Lacis, H. Le Treut, Z.-X. Li, X.-Z. Liang, B. J. Mcavaney, V. P. Meleshko, J. F. B. Mitchell, J .-J. Morcrette, D. A. Randall, L. Rikus, E. Roeckner, J. F. Royer, U. Schlese, D. A. Sheinin, A. Slingo, A. P. Sokolov, K. E. Taylor, W. M. Washington, R. T. Wetherald, I. Yagai, and M.-H. Zhang, "Intercomparison and interpretation of climate feedback processes in 19 atmospheric general circulation models", J. Geophys. Res., Vol. 95, pp. 16601-16615, 1990. https://doi.org/10.1029/JD095iD10p16601
  2. D. C. Hogg, F. O. Guiraud, J. B. Snider, M. T. Decker, and E. R. Westwater, "A steerable dualchannel microwave radiometer for measurements of water vapor and liquid water in the troposphere", J. Climate Appl. Meteor., Vol. 22, pp. 789-806, 1983. https://doi.org/10.1175/1520-0450(1983)022<0789:ASDCMR>2.0.CO;2
  3. J. Guldner and D. Spankuch, "Results of year-round remotely sensed integrated water vapor by groundbased microwave radiometer", J. Appl. Meteor., Vol. 38, pp. 981-988, 1998.
  4. K. H. Chang, S. N. Oh, K. D. Jeong, H. Y. Yang, M. J. Lee, J. Y. Jeong, Y. H. Cho, H. K. Kim, G. M. Park, S. S. Yum, and J. W. Cha, "Cloud physic observation system (CPOS) and validation of its products", Atmosphere, Vol. 17, pp 101-108, 2007.
  5. Yang, H. Y., J. Y. Jeong, K. H. Chand, J. W. Cha, J. W. Jung, Y. C. Kim, M. J. Lee, Y. Y. Bae, S. Y. Kang, K. L. Kim, Y. J. Choi, and C. Y. Choi, "Intercompatison of Daegwallyeong cloud physics observation system (CPOS) products and the visibility calculation by the FSSP size distribution during 2006-2008", Atmosphere, Vol. 26, pp. 65-73, 2010.
  6. E. Westwater, "The accuracy of water vapor and cloud liquid determination by dual-frequency ground-based microwave radiometry", Radio Sci., Vol. 13, pp. 667-685, 1978.
  7. M. Loffler-Mang and M. Kunz, "On the performance of a low-coat K-band Doppler radar for quantities rain measurements", J. Atmos. Ocean. Technol. Vol. 16, pp. 379-387, 1999. https://doi.org/10.1175/1520-0426(1999)016<0379:OTPOAL>2.0.CO;2
  8. R. G. Strauch, "Theory and application of the FMCW Doppler radar", Ph. D. Thesis, University of Colorado, p. 97, 1976.
  9. J. W. Cha, S. S. Yum, K.H. Chang, and S. N. Oh, "Estimation of the melting layer from a Micro Rain Radar (MRR) data at the Cloud Physics Observation System (CPOS) site at Daegwallyeong Weather Station", J. Korean Meteor. Soc., Vol. 43, pp. 77-88, 2007.
  10. C. L. Liu and A. J. Illingworth, "Toward more accurate retrievals of ice water content from radar measurements of clouds", J. Appl. Meteor., Vol. 39, pp. 1130-1146, 2000. https://doi.org/10.1175/1520-0450(2000)039<1130:TMAROI>2.0.CO;2