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学科主题: Multidisciplinary Sciences
题名: Preliminary results of a new global ocean reanalysis
作者: Wang, DX ; Qin, YH ; Xiao, XJ ; Zhang, ZQ ; Wu, FM
通讯作者: qinyh@scsio.ac.cn
关键词: BCC_GODAS2.0 ; temperature ; salinity ; EOF ; El Nino ; El Nino Modoki
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2012
卷: 57, 期:26, 页:3509-3517
部门归属: [Wang DongXiao; Qin YingHao] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Qin YingHao] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China; [Xiao XianJun; Zhang ZuQiang] Natl Climate Ctr, Beijing 100081, Peoples R China; [Wu FengMin] Nanjing Univ Informat Sci & Technol, Nanjing 210044, Jiangsu, Peoples R China
项目归属: LTO
摘要: Using a new global ocean reanalysis of the second generation Global Ocean Data Assimilation System of the Beijing Climate Center (BCC_GODAS2.0) spanning the period 1990-2009, we firstly quantify the accuracy of BCC_GODAS2.0 in representing the temperature and salinity by comparing with OISST and SODA data. The results show that the assimilation system may effectively improve the estimations of temperature and salinity by assimilating all kinds of observations, especially in the equatorial eastern Pacific. Moreover, the root mean square errors of monthly temperature and salinity are respectively reduced by 0.53A degrees C and 0.28 psu, compared with the model control simulation results. Then, the applicability of this ocean reanalysis for sea surface temperature (SST) anomaly variability in the tropical Pacific is evaluated with the observational HadISST data. The NINO3 index of the new reanalysis shows a good agreement with that of HadISST, with a correlation of 93.6%. Variations in SST from BCC_GODAS2.0 are similar to those obtained from HadISST data along the equator, showing the major large zonal-scale features such as the strong magnitude of seasonal cycle. The amplitude of SST anomaly standard deviation in the equatorial eastern Pacific is also closer to observations (HadISST) than NCEP GODAS does. Besides, the first two leading empirical orthogonal function (EOF) modes of the monthly SST anomalies over the tropical Pacific region are explored. The EOF1 pattern of BCC_GODAS2.0 captures a traditional El Nio pattern, which improves magnitudes of the positive SST anomaly in the cold tongue of the eastern Pacific. The EOF2 pattern exhibits a El Nio Modoki pattern. Comparatively, the EOF2 pattern of BCC_GODAS2.0 extends more strongly toward the subtropics. It also overcomes the problem that negative loadings are confined in the narrow equatorial eastern Pacific. Consequently, the magnitude and spatial distribution of the leading EOF patterns of BCC_GODAS2.0 are well consistent with those of HadISST.
语种: 英语
WOS记录号: WOS:000308239400017
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10123
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Recommended Citation:
Wang, DX; Qin, YH; Xiao, XJ; Zhang, ZQ; Wu, FM.Preliminary results of a new global ocean reanalysis,CHINESE SCIENCE BULLETIN,2012,57(26):3509-3517
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