气候变化领域集成服务门户(CCPortal): What causes the spread of model projections of ocean dynamic sea-level change in response to greenhouse gas forcing?

CCPortal

DOI	10.1007/s00382-020-05471-4
	What causes the spread of model projections of ocean dynamic sea-level change in response to greenhouse gas forcing?
	Couldrey M.P.; Gregory J.M.; Boeira Dias F.; Dobrohotoff P.; Domingues C.M.; Garuba O.; Griffies S.M.; Haak H.; Hu A.; Ishii M.; Jungclaus J.; Köhl A.; Marsland S.J.; Ojha S.; Saenko O.A.; Savita A.; Shao A.; Stammer D.; Suzuki T.; Todd A.; Zanna L.
发表日期	2020
ISSN	0930-7575
英文摘要	Sea levels of different atmosphere–ocean general circulation models (AOGCMs) respond to climate change forcing in different ways, representing a crucial uncertainty in climate change research. We isolate the role of the ocean dynamics in setting the spatial pattern of dynamic sea-level (ζ) change by forcing several AOGCMs with prescribed identical heat, momentum (wind) and freshwater flux perturbations. This method produces a ζ projection spread comparable in magnitude to the spread that results from greenhouse gas forcing, indicating that the differences in ocean model formulation are the cause, rather than diversity in surface flux change. The heat flux change drives most of the global pattern of ζ change, while the momentum and water flux changes cause locally confined features. North Atlantic heat uptake causes large temperature and salinity driven density changes, altering local ocean transport and ζ. The spread between AOGCMs here is caused largely by differences in their regional transport adjustment, which redistributes heat that was already in the ocean prior to perturbation. The geographic details of the ζ change in the North Atlantic are diverse across models, but the underlying dynamic change is similar. In contrast, the heat absorbed by the Southern Ocean does not strongly alter the vertically coherent circulation. The Arctic ζ change is dissimilar across models, owing to differences in passive heat uptake and circulation change. Only the Arctic is strongly affected by nonlinear interactions between the three air-sea flux changes, and these are model specific. © 2020, The Author(s).
英文关键词	Climate change; Climate modeling; Ocean heat uptake; Sea-level rise
语种	英语
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145670
作者单位	National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki, Finland; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia; CSIRO Oceans and Atmosphere, Aspendale, Australia; ARC Centre of Excellence for Climate Extremes, Sydney, Australia; National Oceanography Centre, Southampton, United Kingdom; Pacific Northwest National Laboratory, Richland, United States; NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States; Princeton University Program in Atmospheric and Oceanic Sciences, Princeton, United States; Max Planck Institute for Meteorology, Hamburg, Germany; National Center for Atmospheric Research, Boulder, United States; Meteorological Research Institute, Tsukuba, Japan; Center für Erdsystemforschung und Nachhaltigkeit, Universität Hamburg, Hamburg, Germany; Indian Institute of Space Science ...
推荐引用方式 GB/T 7714	Couldrey M.P.,Gregory J.M.,Boeira Dias F.,et al. What causes the spread of model projections of ocean dynamic sea-level change in response to greenhouse gas forcing?[J],2020.
APA	Couldrey M.P..,Gregory J.M..,Boeira Dias F..,Dobrohotoff P..,Domingues C.M..,...&Zanna L..(2020).What causes the spread of model projections of ocean dynamic sea-level change in response to greenhouse gas forcing?.Climate Dynamics.
MLA	Couldrey M.P.,et al."What causes the spread of model projections of ocean dynamic sea-level change in response to greenhouse gas forcing?".Climate Dynamics (2020).