SIMULATION OF SUMMER CLIMATE IN CHINA DURING 1997 AND 1998 USING A REGIONAL AIR-SEA COUPLED MODEL

YAO Su-xiang; HUANG Qian; ZHANG Yao-cun

Abstract:

Using the regional air-sea coupled climate model RegCM3-POM, a series of numerical experiments are performed to simulate the summer climate in 1997 and 1998 with different coupling time steps. The results show that the coupled model has good performance on the simulation of the summer sea surface temperature (SST) in 1997 and 1998, and the simulation results of CPL1 (with the coupling time step at 1 hour) are similar to those of CPL6 (with the coupling time step at 6 hours). The coupled model can well simulate SST differences between 1997 and 1998. As for the simulation of the drought in 1997 and the flood in 1998, the results of CPL6 are more accurate. The coupled model can well simulate the drought in 1997 over North China, and compared with the results of the atmosphere model RegCM3, the simulation ability of the coupled model is improved. The coupling model has better ability in the simulation of the circulation in the middle and low levels, and the water vapor transportation in the coupling model is reasonable in both 1997 and 1998. RegCM3 (an uncoupled model) cannot correctly simulate the transportation path differences between 1997 and 1998, but the coupled model can simulate the differences well.

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YAO Su-xiang, HUANG Qian, ZHANG Yao-cun. SIMULATION OF SUMMER CLIMATE IN CHINA DURING 1997 AND 1998 USING A REGIONAL AIR-SEA COUPLED MODEL [J]. Journal of Tropical Meteorology, 2013, 19(1): 80-86.

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SIMULATION OF SUMMER CLIMATE IN CHINA DURING 1997 AND 1998 USING A REGIONAL AIR-SEA COUPLED MODEL

Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044 China

School of Atmospheric Science, Nanjing University, Nanjing 210093 China

Received Date: 2010-12-25

Rev Recd Date: 2012-11-09

Abstract: Using the regional air-sea coupled climate model RegCM3-POM, a series of numerical experiments are performed to simulate the summer climate in 1997 and 1998 with different coupling time steps. The results show that the coupled model has good performance on the simulation of the summer sea surface temperature (SST) in 1997 and 1998, and the simulation results of CPL1 (with the coupling time step at 1 hour) are similar to those of CPL6 (with the coupling time step at 6 hours). The coupled model can well simulate SST differences between 1997 and 1998. As for the simulation of the drought in 1997 and the flood in 1998, the results of CPL6 are more accurate. The coupled model can well simulate the drought in 1997 over North China, and compared with the results of the atmosphere model RegCM3, the simulation ability of the coupled model is improved. The coupling model has better ability in the simulation of the circulation in the middle and low levels, and the water vapor transportation in the coupling model is reasonable in both 1997 and 1998. RegCM3 (an uncoupled model) cannot correctly simulate the transportation path differences between 1997 and 1998, but the coupled model can simulate the differences well.

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SIMULATION OF SUMMER CLIMATE IN CHINA DURING 1997 AND 1998 USING A REGIONAL AIR-SEA COUPLED MODEL

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