DOI: 10.1175/JCLI-D-16-0305.1
Scopus记录号: 2-s2.0-85022320348
论文题名: Effects of singular-vector-type initial errors on the short-range prediction of Kuroshio extension transition processes
作者: Wang Q. ; Tang Y. ; Pierini S. ; Mu M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 15 起始页码: 5961
结束页码: 5983
语种: 英语
Scopus关键词: Equations of motion
; Error analysis
; Forecasting
; Ocean currents
; Kuroshio Extension
; Ocean circulation
; Perturbation energy
; Shallow water equations
; Shallow water model
; Short-range predictions
; Singular vectors
; Transition process
; Errors
英文摘要: The effects of optimal initial error on the short-range prediction of transition processes between the Kuroshio Extension (KE) bimodalities are analyzed using a reduced-gravity shallow-water model and the singular vector (SV) approach. Emphasis is placed on the spatial structures, growing processes, and effects of the SVs. The results show that the large values of the SVs are mainly located in the first crest region of the KE (around 35°N, 144°E) and in the Kuroshio large meander (KLM) region south of Japan (around 32°N, 139.5°E). The fast growths of the SVs have important impacts on the prediction of transition of the KE bimodality. The initial error with +SV pattern (with positive anomalies in the first crest region of the KE and negative anomalies in the KLM region) tends to strengthen the KE and shift it toward the high-energy state, while the error with -SV pattern is prone to weaken the KE and shift it toward the low-energy state. In addition, the SV-type initial errors grow more quickly in the transition phase of the KE from the high-energy to the low-energy state than in the opposite transition phase. A perturbation energy analysis illustrates that different physical processes are responsible for the error growth in the KE region for different transition phases of the KE; barotropic instability plays a dominant role in the error growth in the low-to-high (LH) energy phase, while the error evolution in the high-to-low (HL) energy phase is mainly caused by advection processes. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48822
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Environmental Science and Engineering, University of Northern British Columbia, Prince George, BC, Canada; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, China; Dipartimento di Scienze e Tecnologie, Università di Napoli Parthenope, Naples, Italy; CoNISMa, Rome, Italy
Recommended Citation:
Wang Q.,Tang Y.,Pierini S.,et al. Effects of singular-vector-type initial errors on the short-range prediction of Kuroshio extension transition processes[J]. Journal of Climate,2017-01-01,30(15)