Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle

doi:10.1007/s00382-012-1554-2

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋环境与数值模拟研究室

	Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle
	Chen, Xianyao 1; Zhang, Yuanling 1; Zhang, Min 1; Feng, Ying 1; Wu, Zhaohua 2; Qiao, Fangli 1; Huang, Norden Eh 1,3
刊名	CLIMATE DYNAMICS
	2013-12
卷号	41 期号:11-12 页码:2797-2815
关键词	Ocean heat content Modulated annual cycle Empirical mode decomposition Instantaneous frequency Instantaneous amplitude CMIP3
ISSN号	0930-7575
DOI	10.1007/s00382-012-1554-2
英文摘要	This study proposes a new more precise and detailed method to examine the performance of IPCC AR4 models in simulation of nonlinear variability of global ocean heat content (OHC) on the annual time scale during 1950-1999. The method is based on the intercomparison of modulated annual cycle (MAC) of OHC and its instantaneous frequency (IF), derived by Empirical Mode Decomposition and Hilbert-Huang Transformation. In addition to indicate the general agreement in gross features globally between models and observation, our results point out the problems both in observation and in modeling. In the well observed Northern Hemisphere, models exhibit extremely good skills to capture nonlinear annual variability of OHC. The simulated MACs are highly correlated with observations (> 0.95) and the IF of MACs varies coherently with each other. However, in sparsely observed Southern Hemisphere (SH), even though the simulated MACs highly correlate with observations, the IF shows significant difference. This comparisons show that the models exhibit coherent variability of IF of MACs in SH with each other, but not with observations, revealing the problems in the objective analyzed dataset using sparse observations. In the well observed tropic region, the models lack the coherence with the observations, indicating inadequate physics of the models in the tropical area. These results illustrate that the proposed method can be used routinely to identify problems in both models and in observation of the global ocean as a critical component of global climate change.
资助项目	NCU[965941]
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000327080400001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3897]
专题	业务部门_海洋环境与数值模拟研究室
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Data Anal & Applicat, Qingdao 266061, Peoples R China; 2.Florida State Univ, Tallahassee, FL 32306 USA; 3.Natl Cent Univ, Chungli 32054, Taiwan
推荐引用方式 GB/T 7714	Chen, Xianyao,Zhang, Yuanling,Zhang, Min,et al. Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle[J]. CLIMATE DYNAMICS,2013,41(11-12):2797-2815.
APA	Chen, Xianyao.,Zhang, Yuanling.,Zhang, Min.,Feng, Ying.,Wu, Zhaohua.,...&Huang, Norden Eh.(2013).Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle.CLIMATE DYNAMICS,41(11-12),2797-2815.
MLA	Chen, Xianyao,et al."Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle".CLIMATE DYNAMICS 41.11-12(2013):2797-2815.