Plateau Meteorology

Plateau Meteorology >

2020 , Vol. 39 >Issue 3: 594 - 608

DOI: https://doi.org/10.7522/j.issn.1000-0534.2019.00040

Assessment of Satellite and Reanalysis Precipitation Data in Chongqing

  • Yan YAN ,
  • Gang LIU ,
  • Jun HE ,
  • Dexian FANG ,
  • Zheng WU ,
  • Shaoying CHEN ,
  • Jianping TANG
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  • <sup>1.</sup>School of Atmospheric Sciences, Nanjing University, Nanjing 210023, Jiangsu, China;<sup>2.</sup>Chongqing Meteorological Observatory, Chongqing 401147, China;<sup>3.</sup>Chongqing Institute of Meteorological Sciences, Chongqing 401147, China

Received date: 2018-10-29

  Online published: 2020-06-28

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Abstract

The hourly precipitation data observed at 34 gauge stations in Chongqing during 1998-2012 is compared with the satellite products [Tropical Rainfall Measuring Mission (TRMM), Climate Prediction Center morphing technique (CMORPH)] and reanalysis data [ECMWF Re-Analysis Interim (ERAIN), Modern-Era Retrospective Analysis for Research and Applications (MERRA), Climate Forecast System Reanalysis (CFSR), Japanese 55-year Reanalysis (JRA55)].The reliability of the precipitation products in high spatiotemporal resolution is analyzed, and the accuracy in diurnal variation is also evaluated.The results show the daily precipitation in Chongqing is generally overestimated by the reanalysis data while the satellite products show agreement with the observations.TRMM is accurate and close to the observational data in the southwest and southeast.CMORPH works best in the northeast while underestimates the rainfall in the other areas.There are evident differences in precipitation intensity and frequency between the satellite and observational data, while the reanalysis data appears to be in agreement with the observations.The peak time of precipitation diurnal variation is mostly from midnight to dawn and displays a hysteresis from the southwest to northeast.The precipitation amount (PA), intensity (PI) and frequency (PF) in the satellite products show the hysteresis from the southwest to northeast, too.There is significant difference in diurnal cycle of precipitation between the reanalysis and satellite data over complex terrain.The reanalysis data overestimates the precipitation from 12:00 to 17:00(Beijing time), especially in the mountainous areas in summer.

Key words： Precipitation; satellite data; reanalysis data; assessment

Cite this article

Yan YAN , Gang LIU , Jun HE , Dexian FANG , Zheng WU , Shaoying CHEN , Jianping TANG . Assessment of Satellite and Reanalysis Precipitation Data in Chongqing[J]. Plateau Meteorology, 2020 , 39(3) : 594 -608 . DOI: 10.7522/j.issn.1000-0534.2019.00040

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