Journal of Tropical Oceanography ›› 2024, Vol. 43 ›› Issue (5): 32-40.doi: 10.11978/2023153CSTR: 32234.14.2023153

• Marine Meteorology • Previous Articles     Next Articles

Retrieval of typhoon precipitation rate over ocean surface based on FY-3D/MWRI Data*

SHANG Jie1(), WU Ying1,2(), ZOU Yike1, MA Jingwen1   

  1. 1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, CMA Key Laboratory for Aerosol-Cloud-Precipitation, Nanjing University of Information Science and Technology, Nanjing 210044, China
    2. School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2023-10-17 Revised:2024-01-12 Online:2024-09-10 Published:2024-10-10
  • Supported by:
    National Natural Science Foundation of China(U2242212)

Abstract:

Using the first level brightness temperature data of the microwave radiation imager (MWRI) carried on the FY-3D (Fengyun-3D) satellite, combined with the second level (L2) precipitation orbit product, and based on the polarization corrected temperature and scattering index (PCT-SI) comprehensive method, two precipitation rate inversion models for the ascending and descending orbit ocean surfaces were established, the two models established in this study were also validated by multiple typhoon cases. The results show that there is little difference in the effectiveness of inversion of precipitation between the ascending orbit data and the descending orbit data, and the precipitation distribution area retrieved is slightly larger than that of the L2 product precipitation area; both models tend to overestimate the low value of precipitation and underestimate the high value of precipitation; the correlation coefficient, mean absolute error, and root mean square error of the ascending orbit inversion model are 0.72632, 2.3055 mm·h-1 and 2.7254 mm·h-1, respectively. The correlation coefficient, average absolute error, and root mean square error of the descending orbit inversion model are 0.73363, 1.9079 mm·h-1 and 2.3651 mm·h-1, respectively. This study has successfully inverted the distribution area of ocean surface precipitation and near surface precipitation rate, providing a reference for estimating the distribution of ocean surface typhoon precipitation and precipitation rate inversion using satellite borne microwave imaging data.

Key words: FY-3D/MWRI, typhoon, ocean surface, rain rate, inversion