globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-015-2672-4
Scopus记录号: 2-s2.0-84959179157
论文题名:
Spatial distribution and the interdecadal change of leading modes of heat budget of the mixed-layer in the tropical Pacific and the association with ENSO
作者: Hu Z.-Z.; Kumar A.; Huang B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期:2017-05-06
起始页码: 1753
结束页码: 1768
语种: 英语
英文关键词: Global Ocean Data Assimilation System ; Interdecadal change ; Leading modes of heat budget of the mixed-layer ; Spatial distribution ; The association with ENSO ; The tropical Pacific
英文摘要: Using heat budget diagnosis of ocean mixed layer from the Global Ocean Data Assimilation System, the spatial distribution of the leading modes of the heat budget was examined. The analysis was for the tropical Pacific in 1979–2013 and was based on combined empirical orthogonal function (CEOF) analysis. The interdecadal changes of the leading modes and their associations with El Niño-Southern Oscillation (ENSO) were also analyzed. The first leading CEOF mode (CEOF1) corresponds to the ENSO mature phase. The contribution from the zonal advection was relatively small along the equator, except the region near the Pacific coast of Central America. The vertical entrainment and diffusion (surface heat flux) had pronounced maxima with positive (negative) values along the equatorial central and eastern Pacific. The meridional advection displayed a different spatial pattern with large positive values on both sides of the equator and smaller values along the equator. The total meridional advection anomaly was mainly determined by advection of anomalous temperature by climatological current responsible for broadening of the ENSO SSTA pattern meridionally. The zonal advection varied almost simultaneously with the tendency of ocean temperature anomaly in the mixed layer. The second leading CEOF mode (CEOF2) included contribution to SSTA tendency during the ENSO developing phase. The distribution pattern and amplitude of the zonal advection in the eastern Pacific in CEOF2 was similar to but with opposite sign to that in CEOF1. The amplitudes of the other dynamical and thermodynamical terms were smaller than that in CEOF1 and spatial distributions displayed an opposite variation between the Pacific coast of Central America and central and eastern tropical Pacific in CEOF2. A comparison of two periods (1979–1999 and 2000–2013) suggested that coupling in the tropical Pacific weakened at ENSO time scales and shifted to a relatively higher frequency regime (from 2 to 4 years averaged in 1979–1999 to 1.5–3 years) after 2000. © 2015, Springer-Verlag (outside the USA).
资助项目: NSF, National Aeronautics and Space Administration ; NOAA, National Aeronautics and Space Administration ; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53804
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作者单位: Climate Prediction Center, NCEP/NWS/NOAA, 5830 University Research Court, College Park, MD, United States; Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, 270 Research Hall, Mail Stop 6C5, George Mason University, 4400 University Drive, Fairfax, VA, United States

Recommended Citation:
Hu Z.-Z.,Kumar A.,Huang B.. Spatial distribution and the interdecadal change of leading modes of heat budget of the mixed-layer in the tropical Pacific and the association with ENSO[J]. Climate Dynamics,2016-01-01,46(2017-05-06)
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