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DOI | 10.1088/1748-9326/aaedc3 |
Asymmetric dynamical ocean responses in warming icehouse and cooling greenhouse climates | |
Kvale, Karin F.1; Turner, Katherine E.1,4; Keller, David P.1; Meissner, Katrin J.2,3 | |
2018-12-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Australia; England |
英文摘要 | Warm periods in Earth's history tend to cool more slowly than cool periods warm. Here we explore initial differences in how the global ocean takes up and gives up heat and carbon in forced rapid warming and cooling climate scenarios. We force an intermediate-complexity earth system model using two atmospheric CO2 scenarios. A ramp-up (1% per year increase in atmospheric CO2 for 150 years) starts from an average global CO2 concentration of 285 ppm to represent warming of an icehouse climate. A ramp-down (1% per year decrease in atmospheric CO2 for 150 years) starts from an average global CO2 concentration of 1257 ppm to represent cooling of a greenhouse climate. Atmospheric CO2 is then held constant in each simulation and the model is integrated an additional 350 years. The ramp-down simulation shows a weaker response of surface air temperature to changes in radiative forcing relative to the ramp-up scenario. This weaker response is due to a relatively large and fast release of heat from the ocean to the atmosphere. This asymmetry in heat exchange in cooling and warming scenarios exists mainly because of differences in the response of the ocean circulation to forcing. In the ramp-up, increasing stratification and weakening of meridional overturning circulation slows ocean heat and carbon uptake. In the ramp-down, cooling accelerates meridional overturning and deepens vertical mixing, accelerating the release of heat and carbon stored at depth. Though idealized, our experiments offer insight into differences in ocean dynamics in icehouse and greenhouse climate transitions. |
英文关键词 | ocean dynamics greenhouse cooling climate warming climate icehouse ocean circulation ocean heat release |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453787400001 |
WOS关键词 | MARINE ECOSYSTEM ; HEAT UPTAKE ; SENSITIVITY ; CARBON ; MODEL ; CIRCULATION ; DOMINANCE ; STORAGE ; STATE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/37563 |
专题 | 气候变化 |
作者单位 | 1.GEOMAR Helmholtz Ctr Ocean Res, West Shore Campus,Duesternbrooker Way 20, D-24105 Kiel, Germany; 2.UNSW, Climate Change Res Ctr, Level 4 Mathews Bldg, Sydney, NSW, Australia; 3.ARC Ctr Excellence Climate Extremes, Sydney, NSW, Australia; 4.Univ Liverpool, Dept Earth Ocean & Ecol Sci, Nicholson Bldg,4 Brownlow St, Liverpool L69 3GP, Merseyside, England |
推荐引用方式 GB/T 7714 | Kvale, Karin F.,Turner, Katherine E.,Keller, David P.,et al. Asymmetric dynamical ocean responses in warming icehouse and cooling greenhouse climates[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(12). |
APA | Kvale, Karin F.,Turner, Katherine E.,Keller, David P.,&Meissner, Katrin J..(2018).Asymmetric dynamical ocean responses in warming icehouse and cooling greenhouse climates.ENVIRONMENTAL RESEARCH LETTERS,13(12). |
MLA | Kvale, Karin F.,et al."Asymmetric dynamical ocean responses in warming icehouse and cooling greenhouse climates".ENVIRONMENTAL RESEARCH LETTERS 13.12(2018). |
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