DOI: 10.1175/JCLI-D-15-0545.1
Scopus记录号: 2-s2.0-84966455403
论文题名: Interannual modulations of oceanic imprints on the wintertime atmospheric boundary layer under the changing dynamical regimes of the Kuroshio Extension
作者: Masunaga R. ; Nakamura H. ; Miyasaka T. ; Nishii K. ; Qiu B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 9 起始页码: 3273
结束页码: 3296
语种: 英语
Scopus关键词: Atmospheric structure
; Atmospheric temperature
; Boundary layers
; Fighter aircraft
; Hydrostatic pressure
; Modulation
; Ocean currents
; Oceanography
; Sea level
; Surface waters
; Air sea interactions
; Boundary currents
; Frontogenesis/frontolysis
; Marine boundary layers
; Meso-scale systems
; Reanalysis
; Atmospheric boundary layer
; air-sea interaction
; boundary current
; boundary layer
; climatology
; frontogenesis
; marine atmosphere
; mesoscale meteorology
; meteorology
; sea surface temperature
; winter
; Kuroshio Extension
; Pacific Ocean
英文摘要: The Kuroshio Extension (KE) fluctuates between its different dynamic regimes on (quasi) decadal time scales. In its stable (unstable) regime, the KE jet is strengthened (weakened) and less (more) meandering. The present study investigates wintertime mesoscale atmospheric structures modulated under the changing KE regimes, as revealed in high-resolution satellite data and data from a particular atmospheric reanalysis (ERA-Interim). In the unstable KE regime, a positive anomaly in sea surface temperature (SST) to the north of the climatological KE jet accompanies positive anomalies in upward heat fluxes from the ocean, surface wind convergence, and cloudiness. As revealed in the atmospheric reanalysis, these positive anomalies coincide with local lowering of sea level pressure, weaker vertical wind shear, warming and thickening of the marine atmospheric boundary layer (MABL), anomalous ascent, and convective precipitation. In the stable KE regime, by contrast, the corresponding imprints of sharp SST gradients across the KE and Oyashio fronts on the wintertime MABL are separated more distinctly, and so are the surface baroclinic zones along those two SST fronts. In the ERA-Interim data, such mesoscale imprints of the KE variability as above are not well represented in a period during which the resolution of SST data prescribed is relatively low. The present study thus elucidates the importance of high-resolution SST data prescribed for atmospheric reanalysis in representing modulations of the MABL structure and air-sea fluxes by the variability of oceanic fronts and/or jets, including the modulations occurring with the changing KE regimes through the hydrostatic pressure adjustment and vertical mixing mechanisms. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49943
Appears in Collections: 气候变化事实与影响
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作者单位: Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Application Laboratory, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Department of Oceanography, University of Hawai'i at Manoa, Honolulu, HI, United States
Recommended Citation:
Masunaga R.,Nakamura H.,Miyasaka T.,et al. Interannual modulations of oceanic imprints on the wintertime atmospheric boundary layer under the changing dynamical regimes of the Kuroshio Extension[J]. Journal of Climate,2016-01-01,29(9)