DOI: 10.1175/JCLI-D-17-0351.1
Scopus记录号: 2-s2.0-85041690743
论文题名: Effects of projected changes in wind, atmospheric temperature, and freshwater inflow on the Ross Sea
作者: Dinniman M.S. ; Klinck J.M. ; Hofmann E.E. ; Smith W.O. ; Jr.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 4 起始页码: 1619
结束页码: 1635
语种: 英语
英文关键词: Antarctica
; Continental shelf/slope
; Ice shelves
; Ocean
; Sea ice
; Water masses
Scopus关键词: Atmospheric movements
; Atmospheric thermodynamics
; Charge density waves
; Ice
; Interlocking signals
; Mixing
; Saline water
; Sea ice
; Wind
; Antarctica
; Continental shelf/slope
; Ice shelves
; Ocean
; Water mass
; Atmospheric temperature
; air temperature
; atmosphere-ice-ocean system
; continental shelf
; continental slope
; estuarine front
; freshwater input
; ice shelf
; sea ice
; vertical mixing
; water mass
; wind field
; Antarctica
; Ross Ice Shelf
; Ross Sea
; Southern Ocean
; West Antarctica
英文摘要: A 5-km horizontal resolution regional ocean-sea ice-ice shelf model of the Ross Sea is used to examine the effects of changes in wind strength, air temperature, and increased meltwater input on the formation of high-salinity shelf water (HSSW), on-shelf transport and vertical mixing of Circumpolar Deep Water (CDW) and its transformation into modified CDW (MCDW), and basal melt of the Ross Ice Shelf (RIS). A 20% increase in wind speed, with no other atmospheric changes, reduced summer sea ice minimum area by 20%, opposite the observed trend of the past three decades. Increased winds with spatially uniform, reduced atmospheric temperatures increased summer sea ice concentrations, on-shelf transport of CDW, vertical mixing of MCDW, HSSW volume, and (albeit small) RIS basal melt. Winds and atmospheric temperatures from the SRES A1B scenario forcing of the MPI ECHAM5 model decreased on-shelf transport of CDW and vertical mixing of MCDW for 2046-61 and 2085-2100 relative to the end of the twentieth century. The RIS basal melt increased slightly by 2046-61 (9%) and 2085-2100 (13%). Advection of lower-salinity water onto the continental shelf did not significantly affect sea ice extent for the 2046-61 or 2085-2100 simulations. However, freshening reduces on-shelf transport of CDW, vertical mixing of MCDW, and the volume of HSSW produced. The reduced vertical mixing of MCDW, while partially balanced by the reduced on-shelf transport of CDW, enhances the RIS basal melt rate relative to the twentieth-century simulation for 2046-61 (13%) and 2085-2100 (17%). © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111660
Appears in Collections: 气候减缓与适应
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作者单位: Center for Coastal Physical Oceanography, Old Dominion University, Norfolk, VA, United States; Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, United States
Recommended Citation:
Dinniman M.S.,Klinck J.M.,Hofmann E.E.,et al. Effects of projected changes in wind, atmospheric temperature, and freshwater inflow on the Ross Sea[J]. Journal of Climate,2018-01-01,31(4)