DOI: 10.1175/JCLI-D-15-0110.1
Scopus记录号: 2-s2.0-84950121659
论文题名: Climatic consequences of a Pine Island Glacier collapse
作者: Green J.A.M. ; Schmittner A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 23 起始页码: 9221
结束页码: 9234
语种: 英语
Scopus关键词: Atmospheric temperature
; Catchments
; Climate models
; Enthalpy
; Heat flux
; Ice
; Sea ice
; Coupled models
; Geographic location
; Ice sheet
; Meridional overturning circulations
; Thermocline circulation
; Oceanography
; Antarctic Intermediate Water
; glacier
; ice sheet
; meltwater
; meridional circulation
; North Atlantic Deep Water
; overturn
; thermocline
; Antarctica
; Pine Island Glacier
; Southern Ocean
; West Antarctica
英文摘要: An intermediate-complexity climate model is used to simulate the impact of an accelerated Pine Island Glacier mass loss on the large-scale ocean circulation and climate. Simulations are performed for preindustrial conditions using hosing levels consistent with present-day observations of 3000 m3 s-1, at an accelerated rate of 6000 m3 s-1, and at a total collapse rate of 100 000 m3 s-1, and in all experiments the hosing lasted 100 years. It is shown that even a modest input of meltwater from the glacier can introduce an initial cooling over the upper part of the Southern Ocean due to increased stratification and ice cover, leading to a reduced upward heat flux from Circumpolar Deep Water. This causes global ocean heat content to increase and global surface air temperatures to decrease. The Atlantic meridional overturning circulation (AMOC) increases, presumably owing to changes in the density difference between Antarctic Intermediate Water and North Atlantic Deep Water. Simulations with a simultaneous hosing and increases of atmospheric CO2 concentrations show smaller effects of the hosing on global surface air temperature and ocean heat content, which the authors attribute to the melting of Southern Ocean sea ice. The sensitivity of the AMOC to the hosing is also reduced as the warming by the atmosphere completely dominates the perturbations. © 2015 American Meteorological Society. 资助项目: NOAA, National Oceanic and Atmospheric Administration
; NSF, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50892
Appears in Collections: 气候变化事实与影响
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作者单位: School of Ocean Sciences, Bangor University, Menai Bridge, United Kingdom; College of Earth, Ocean and Atmosphere Sciences, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Green J.A.M.,Schmittner A.. Climatic consequences of a Pine Island Glacier collapse[J]. Journal of Climate,2015-01-01,28(23)