DOI: 10.1029/2017JC013749
Scopus记录号: 2-s2.0-85051135065
论文题名: Process-Specific Contributions to Anomalous Java Mixed Layer Cooling During Positive IOD Events
作者: Delman A.S. ; McClean J.L. ; Sprintall J. ; Talley L.D. ; Bryan F.O.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 6 起始页码: 4153
结束页码: 4176
语种: 英语
英文关键词: budget analysis
; Indian Ocean Dipole
; Java
; mixed layer
; remote forcing
; Sumatra
英文摘要: Negative sea surface temperature (SST) anomalies associated with positive Indian Ocean Dipole (pIOD) events first appear in the seasonal upwelling zone along the southern coast of Java during May–July. The evolution of anomalous SSTs in this coastal region is analyzed by computing a temperature budget using output from a strongly eddy-active ocean general circulation model. The seasonal cooling south of Java in May–July is driven by a reduction in incoming shortwave radiation and by vertical mixing, consistent with earlier studies in the region; however, the model budget also shows an advective contribution that drives anomalous cooling at the onset of pIOD events. To identify which process(es) are responsible for the anomalous advective cooling during pIOD events, a novel process index regression method is used to estimate the contributions of wind stress, equatorial Kelvin waves, mesoscale eddies, and Lombok Strait flow to anomalous cooling south of Java. Using this method, wind stress forcing along the west coast of Sumatra is found to make the most substantial contribution to anomalous cooling south of Java, with lesser contributions from equatorially sourced Kelvin waves and local wind stress. Mesoscale eddies redistribute heat from the Lombok Strait outflow, and have an anomalous warming effect on the eastern side of the upwelling region. The process-specific temperature budget south of Java highlights the importance of wind stress forcing west of Sumatra relative to equatorial and local forcing, and explains most of the mixed layer temperature anomaly evolution associated with advection during pIOD events. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113829
Appears in Collections: 气候减缓与适应
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作者单位: Scripps Institution of Oceanography, University of California-San Diego, La Jolla, CA, United States; Now at Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Delman A.S.,McClean J.L.,Sprintall J.,et al. Process-Specific Contributions to Anomalous Java Mixed Layer Cooling During Positive IOD Events[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(6)