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DOI | 10.1175/JCLI-D-18-0388.1 |
Flux Correction and Overturning Stability: Insights from a Dynamical Box Model | |
Gnanadesikan, Anand; Kelson, Richard; Sten, Michaela | |
2018-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:22页码:9335-9350 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A recent paper suggested that the global climate models used to project future climate changes may significantly overestimate the stability of the Atlantic meridional overturning circulation under anthropogenic global warming. It further asserted that flux adjusting the models (adding offsets to heat and freshwater fluxes to reproduce the observed density field) may reduce model stability. However, temperature, salinity, and density fields in climate models likely deviate from observations because of biases in model physics as well as inaccuracies in fluxes. In such cases it is unclear whether adjusting the fluxes to produce a more realistic density field will result in a model with more realistic stability properties, as flux correction may be compensating for other inaccuracies in model formulation. We investigate this question using a simplified dynamical box model, in which we can flux correct one version of the model to match density gradients within another version of the model. We show that flux adjustment can realistically compensate for biases in stability associated with some processes, such as uncertainty in the value of the vertical diffusivity, but not other processes, such as inaccurate simulation of the relationship between density structure and overturning or the isopycnal tracer diffusivity coefficient. An ability to compensate for biases when the overturning shuts off does not imply an ability to compensate for biases in when it reestablishes itself, and vice versa. |
英文关键词 | Meridional overturning circulation Mixing Ocean dynamics Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448510200003 |
WOS关键词 | ATLANTIC THERMOHALINE CIRCULATION ; SOUTHERN-OCEAN ; COUPLED MODEL ; TRANSPORT ; SIMULATIONS ; EQUILIBRIA ; PYCNOCLINE ; CCSM3 |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20032 |
专题 | 气候变化 |
作者单位 | Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA |
推荐引用方式 GB/T 7714 | Gnanadesikan, Anand,Kelson, Richard,Sten, Michaela. Flux Correction and Overturning Stability: Insights from a Dynamical Box Model[J]. JOURNAL OF CLIMATE,2018,31(22):9335-9350. |
APA | Gnanadesikan, Anand,Kelson, Richard,&Sten, Michaela.(2018).Flux Correction and Overturning Stability: Insights from a Dynamical Box Model.JOURNAL OF CLIMATE,31(22),9335-9350. |
MLA | Gnanadesikan, Anand,et al."Flux Correction and Overturning Stability: Insights from a Dynamical Box Model".JOURNAL OF CLIMATE 31.22(2018):9335-9350. |
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