Plateau Meteorology

Plateau Meteorology >

2016 , Vol. 35 >Issue 6: 1524 - 1539

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.00107

Evaluation of CMIP5 Climate Models on Simulating the Amount and Frequency of Convective and Stratiform Precipitation in East Asia

  • SUN Yue ,
  • WU Tongwen ,
  • JIN Xia ,
  • Laurent Li
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  • Chinese Academy of Meteorological Sciences, Beijing 100081, China;National Climate Centre, Beijing 100081, China;Laboratoire des sciences du climat et de l'environnement, Commissariat à l'énergie atomique et aux énergies alternatives, Gif-sur-Yvette, 91191, France;Laboratoire de Météorologie Dynamique, Centre National de la Recherche Scientifique, Sorbonne Université, UPMC Univ Paris 06, Paris, 75005, France

Received date: 2015-07-03

  Online published: 2016-12-28

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Abstract

Based on the hourly merged precipitation data and Tropical Rainfall Measuring Mission (TRMM) 3A25 monthly averaged precipitation data, the simulation performances about the total precipitation amount, amount and frequency of precipitation (both convective and stratiform) in East Asia in 19 coupled ocean-atmosphere climate models of CMIP5 have been assessed. Results indicate that:(1) All models can simulate the basic pattern of precipitation in East Asia, high-and medium-resolution models can simulate the main precipitation centers:southern slope of the Himalayas, Southern China and the adjacent ocean areas. But low-resolution models can hardly do so. Total precipitation amount in autumn and winter is better simulated than in other seasons. The spatial correlation coefficients of the total precipitation between the simulation and observation exceed 0.7 for autumn and winter, but only 0.50 and 0.61 for spring and summer. (2) According to TRMM, main convective precipitation centers lie over the Philippines, Bay of Bengal and southern of the Himalayas, while stratiform precipitation centers lie on the southern of the Himalayas, downstream of the Yangtze River, East China Sea and Bay of Bengal. As for simulations, high-and medium-resolution models are better than low-resolution models. By comparing the multi-model average with the TRMM data, convective precipitation amount is better simulated, but there are too little stratiform precipitations in the tropics. (3) As for the frequency of total precipitation in East Asia, results from 13 models exceed 60%. For the frequency of different precipitation intensities, the frequency located between 0.001~1 mm·h-1 is the highest in most of the models, while the frequency of intensity which is greater than 1.0 mm·h-1 is quite small. (4) For the stratiform precipitation frequency, high-and medium-resolution models are closer to the multi-model average, but for the convective precipitation, high-and medium-resolution models are not significantly better than low-resolution models. Therefore, the performance of high-and medium-resolution models is generally better than low-resolution models. Improving resolution of models is then necessary to improve their performance in simulating precipitation in East Asia.

Key words： CMIP5; Convective precipita; Stratiform precipita; Model evaluation

Cite this article

SUN Yue , WU Tongwen , JIN Xia , Laurent Li . Evaluation of CMIP5 Climate Models on Simulating the Amount and Frequency of Convective and Stratiform Precipitation in East Asia[J]. Plateau Meteorology, 2016 , 35(6) : 1524 -1539 . DOI: 10.7522/j.issn.1000-0534.2015.00107

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