globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0458.1
Scopus记录号: 2-s2.0-84983504638
论文题名:
The transient response of southern ocean circulation to geothermal heating in a global climate model
作者: Downes S.M.; Hogg A.M.; Griffies S.M.; Samuels B.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:16
起始页码: 5689
结束页码: 5708
语种: 英语
Scopus关键词: Geothermal energy ; Geothermal heating ; Heat flux ; Heating ; Oceanography ; Regional planning ; Temperature ; Transient analysis ; Background density ; Bottom temperature ; Coupled Model Intercomparison Project ; Fully-coupled model ; Global climate model ; Observational study ; Overturning circulation ; Temperature changes ; Climate models
英文摘要: Model and observational studies have concluded that geothermal heating significantly alters the global overturning circulation and the properties of the widely distributed Antarctic BottomWater. Here two distinct geothermal heat flux datasets are tested under different experimental designs in a fully coupled model that mimics the control run of a typical Coupled Model Intercomparison Project (CMIP) climate model. The regional analysis herein reveals that bottom temperature and transport changes, due to the inclusion of geothermal heating, are propagated throughout the water column, most prominently in the Southern Ocean, with the background density structure and major circulation pathways acting as drivers of these changes. While geothermal heating enhances Southern Ocean abyssal overturning circulation by 20%-50%, upwelling of warmer deepwaters and cooling of upper oceanwaters within theAntarcticCircumpolarCurrent (ACC) region decrease its transport by 3-5 Sv (1 Sv = 106m3 s-1). The transient responses in regional bottom temperature increases exceed 0.1°C. The large-scale features that are shown to transport anomalies far fromtheir geothermal source all exist in the Southern Ocean. Such features include steeply sloping isopycnals, weak abyssal stratification, voluminous southward flowing deep waters and exported bottom waters, the ACC, and the polar gyres. Recently the SouthernOcean has been identified as a prime region for deep oceanwarming; geothermal heating should be included in climate models to ensure accurate representation of these abyssal temperature changes. © 2016 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50350
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作者单位: Research School of Earth Sciences, ARC Centre of Excellence for Climate System Science, Australian National University, Acton, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Australia; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States

Recommended Citation:
Downes S.M.,Hogg A.M.,Griffies S.M.,et al. The transient response of southern ocean circulation to geothermal heating in a global climate model[J]. Journal of Climate,2016-01-01,29(16)
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