| BCC_CSM1.1(m) 模式对热带太平洋潜热通量的评估 |
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| 引用本文： | 唐慧琴,曾刚,黄悦.BCC_CSM1.1(m) 模式对热带太平洋潜热通量的评估[J].应用气象学报,2016,27(4):463-472. |
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| 作者姓名： | 唐慧琴 曾刚 黄悦 |
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| 作者单位： | 1.南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室，南京 210044 |
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| 基金项目： | 资助项目： 公益性行业（气象）科研专项（GYHY201306020），国家重点基础研究发展计划(2013CB430202)，国家自然科学基金项目（41430528，41575085） |
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| 摘 要： | 利用1979—2005年OAFlux (Objectively Analyzed air-sea Fluxes) 观测资料以及CMIP5的15个耦合模式的模拟结果，评估了BCC_CSM1.1(m) 模式对热带太平洋年平均潜热通量气候态和变化趋势的模拟能力，并分析造成趋势偏差的可能原因。结果表明:BCC_CSM1.1(m) 模式模拟热带太平洋年平均潜热通量气候态在各纬度上差异较大, 其中在赤道的模拟能力较佳，而在10°N和8°S附近模拟偏差较大；BCC_CSM1.1(m) 模式对热带太平洋年平均潜热通量趋势的模拟能力一般，造成趋势偏差的主要原因是该模式低估了风速对潜热通量的局地贡献以及它对风速的非局地贡献的模拟存在较大偏差。此外，该模式未能较好地模拟出风速对全球变暖响应。因此，BCC_CSM1.1(m) 模式对热带太平洋年平均潜热通量趋势模拟的改进需加强其对风速模拟的改进。
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| 关 键 词： | BCC_CSM1.1(m) 潜热通量 热带太平洋 |
| 收稿时间： | 2015-11-19 |
An Assessment of the Tropical Pacific Latent Heat Flux Simulated by BCC_CSM 1.1(m) |
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| Tang Huiqing,Zeng Gang and Huang Yue.An Assessment of the Tropical Pacific Latent Heat Flux Simulated by BCC_CSM 1.1(m)[J].Quarterly Journal of Applied Meteorology,2016,27(4):463-472. |
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| Authors: | Tang Huiqing Zeng Gang and Huang Yue |
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| Affiliation: | 1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing 2100442.Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu 610225 |
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| Abstract: | The simulated tropical Pacific annual mean latent heat flux by BCC_CSM1.1(m) as well as 14 other CMIP5 models are analyzed and compared with observations from objectively analyzed air-sea fluxes (OAFlux). Some possible causes for annual latent heat flux trend biases in BCC_CSM1.1(m) are investigated.Biases of annual average latent heat flux between observations and BCC_CSM1.1(m) in the tropical ocean and west boundary current area is larger, while in mid-high latitudes is smaller. Annual average latent heat flux is larger than observations, and annual mean latent heat flux variance is smaller than observations. The tropical Pacific annual and zonal mean latent heat flux is quite different in different latitudes. Simulation results of BCC_CSM1.1(m) near 10°N and 8°S have relatively large biases, while the biases are rather small in equator. So BCC_CSM1.1(m) needs to focus on improving the simulation of Pacific latent heat flux near 10° in each hemisphere.Among 15 CMIP5 models, NorESM1_M gives the best simulation result, and the root mean square error is the smallest, while the root mean square error of GISS_E2_R result is the largest. The root mean square error of BCC_CSM1.1(m) result is 22.9 W·m-2, ranking eighth among all models, which indicates a moderate simulating ability.The trend of the tropical Pacific annual mean latent heat flux in BCC_CSM1.1(m) has biases comparing with the observation, and the cause can be concluded in 3 aspects. First, the local contribution horizontal wind speed to latent heat flux trend is underestimated in BCC_CSM1.1(m). Second, there are large biases for simulated non-local contribution of horizontal wind speed in BCC_CSM1.1(m). Finally, the response to the global warming of horizontal wind speed in BCC_CSM1.1(m) has large biases as well. Therefore, the main cause for trend biases of tropical Pacific annual mean latent heat flux is the large simulation deviation of horizontal wind speed in BCC_CSM1.1(m), and therefore the model needs improving in horizontal wind speed simulation. |
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| Keywords: | BCC_CSM1 1(m) latent heat flux tropical Pacific |
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