| BCC_CSM对全球海表温度和混合层深度的模拟评估 |
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| 引用本文： | 朱芳泽,王召民,刘成彦,黄河清,詹德权,葛琛琦,林霞,谢泽林.BCC_CSM对全球海表温度和混合层深度的模拟评估[J].大气科学学报,2014,37(6):684-694. |
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| 作者姓名： | 朱芳泽 王召民 刘成彦 黄河清 詹德权 葛琛琦 林霞 谢泽林 |
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| 作者单位： | 1. 南京信息工程大学大气科学学院,江苏南京210044;南京信息工程大学极地气候系统与全球变化实验室,江苏南京210044
2. 南京信息工程大学极地气候系统与全球变化实验室,江苏南京210044;南京信息工程大学海洋科学学院,江苏南京210044 |
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| 基金项目： | 国家气象局行业专项，国家自然科学基金面上项目，江苏省创新创业团队计划 |
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| 摘 要： | 为了定量评估北京气候中心(BCC)发展的BCC_CSM对当代全球海表温度和混合层深度的模拟能力,以WOA09(World Ocean Atlas 2009)观测资料作为检验模式的气候态实况场,提取包括BCC_CSM在内的CMIP5中的17个海气耦合模式的模拟结果,评估BCC_CSM模拟的全球海表温度和混合层深度的气候平均态并分析造成偏差的可能原因。结果表明:BCC_CSM模拟的海表温度在北半球中高纬的误差较大,而在其余纬度的模拟性能较佳。偏差的产生主要归因于海洋环流偏差。BCC_CSM模拟的最深混合层在北半球中高纬和南半球高纬地区的误差较大,同时这些区域也是多模式模拟差异最大的区域;其模拟的最浅混合层在南半球中高纬的偏差较大。冬季大西洋经向翻转环流的模拟在北大西洋下沉的位置偏南导致北半球高纬地区海表温度偏冷。由此认为包括BCC_CSM在内的许多海气耦合模式需重点改进对南、北半球深对流海域物理过程的描述,以提高气候预测的可信度。
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| 关 键 词： | 模式评估 BCC_CSM CMIP 海表温度 混合层深度 |
| 收稿时间： | 2014/6/15 0:00:00 |
| 修稿时间： | 2014/10/31 0:00:00 |
An assessment of the global sea surface temperature and mixed layer depth simulated in BCC_CSM |
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| ZHU Fang-ze,WANG Zhao-min,LIU Cheng-yan,HUANG He-qing,ZHAN De-quan,GE Chen-qi,LIN Xia and XIE Ze-lin.An assessment of the global sea surface temperature and mixed layer depth simulated in BCC_CSM[J].大气科学学报,2014,37(6):684-694. |
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| Authors: | ZHU Fang-ze WANG Zhao-min LIU Cheng-yan HUANG He-qing ZHAN De-quan GE Chen-qi LIN Xia and XIE Ze-lin |
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| Institution: | School of Atmospheric Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China;School of Atmospheric Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China;Polar Climate System and Global Change Laboratory, NUIST, Nanjing 210044, China;School of Marine Sciences, NUIST, Nanjing 210044, China |
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| Abstract: | This paper quantitatively evaluates the simulated present-day global sea surface temperature(SST) and mixed layer depth(MLD) in BCC_CSM developed by Beijing Climate Center(BCC) in order to provide suggestions for BCC_CSM''s development and improvement.The simulated SST and MLD from BCC_CSM as well as from other 15 CMIP5 models are analyzed and compared with the observed SST and MLD from World Ocean Atlas 2009(WOA09).This paper also investigates some possible reasons for the biases in these models.According to the analysis, SST in mid-high latitudes of the Northern Hemisphere in BCC_CSM have relatively large biases, while the biases are rather small in other latitudes.This paper finds that the SST biases are mainly caused by biased ocean circulation.There are large biases for simulated maximum MLD in BCC_CSM in mid-high latitudes of the Northern Hemisphere and high latitudes of the Southern Hemisphere, where many CMIP5 models have the same problem.There are also large biases for minimum MLD in mid-high latitudes of the Southern Hemisphere.In winter, the southward shift of the site where the Atlantic Meridional Overturning Circulation(AMOC) sinks leads to a cold bias of SST in high latitudes of the Northern Hemisphere.These results suggest that, in high latitudes of both the Northern and Southern Hemispheres where deep convections occur, many physical processes need to be better represented in the coupled ocean-atmosphere models including BCC_CSM, to enhance their reliability in climate prediction. |
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| Keywords: | model assessment BCC_CSM CMIP5 sea surface temperature mixed layer depth |
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