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DOI | 10.1175/JCLI-D-18-0151.1 |
Using Atmospheric Energy Transport to Quantitatively Constrain South Pacific Convergence Zone Shifts during ENSO | |
Lintner, Benjamin R.1,2; Boos, William R.3,4 | |
2019-03-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:6页码:1839-1855 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The South Pacific convergence zone (SPCZ) exhibits well-known spatial displacements in response to anomalous sea surface temperatures (SSTs) associated with the El Nino-Southern Oscillation (ENSO). Although dynamic and thermodynamic changes during ENSO events are consistent with observed SPCZ shifts, explanations for these displacements have been largely qualitative. This study applies a theoretical framework based on generalizing arguments about the relationship between the zonal-mean intertropical convergence zone (ITCZ) and atmospheric energy transport (AET) to 2D, permitting quantification of SPCZ displacements during ENSO. Using either resolved atmospheric energy fluxes or estimates of column-integrated moist energy sources, this framework predicts well the observed SPCZ shifts during ENSO, at least when anomalous ENSO-region SSTs are relatively small. In large-amplitude ENSO events, such as the 1997/98 El Nino, the framework breaks down because of the large change in SPCZ precipitation intensity. The AET framework permits decomposition of the ENSO forcing into various components, such as column radiative heating versus surface turbulent fluxes, and local versus remote contributions. Column energy source anomalies in the equatorial central and eastern Pacific dominate the SPCZ shift. Furthermore, although the radiative flux anomaly is larger than the surface turbulent flux anomaly in the SPCZ region, the radiative flux anomaly, which can be viewed as a feedback on the ENSO forcing, accounts for slightly less than half of SPCZ precipitation anomalies during ENSO. This study also introduces an idealized analytical model used to illustrate AET anomalies during ENSO and to obtain a scaling for the SPCZ response to an anomalous equatorial energy source. |
英文关键词 | South Pacific Ocean Tropics Energy transport Precipitation ENSO Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460745300001 |
WOS关键词 | PART II ; REGIONAL ENERGY ; HEAT-TRANSPORT ; ITCZ LOCATION ; PRECIPITATION ; BUDGET ; SPCZ ; ERA ; TELECONNECTIONS ; VARIABILITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20197 |
专题 | 气候变化 |
作者单位 | 1.Rutgers State Univ, New Brunswick, NJ 08901 USA; 2.Rutgers Inst Earth Ocean & Atmospher Sci, New Brunswick, NJ 08901 USA; 3.Univ Calif Berkeley, Berkeley, CA 94720 USA; 4.Lawrence Berkeley Natl Lab, Berkeley, CA USA |
推荐引用方式 GB/T 7714 | Lintner, Benjamin R.,Boos, William R.. Using Atmospheric Energy Transport to Quantitatively Constrain South Pacific Convergence Zone Shifts during ENSO[J]. JOURNAL OF CLIMATE,2019,32(6):1839-1855. |
APA | Lintner, Benjamin R.,&Boos, William R..(2019).Using Atmospheric Energy Transport to Quantitatively Constrain South Pacific Convergence Zone Shifts during ENSO.JOURNAL OF CLIMATE,32(6),1839-1855. |
MLA | Lintner, Benjamin R.,et al."Using Atmospheric Energy Transport to Quantitatively Constrain South Pacific Convergence Zone Shifts during ENSO".JOURNAL OF CLIMATE 32.6(2019):1839-1855. |
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