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DOI | 10.1007/s00382-017-3632-y |
Thermohaline circulation: a missing equation and its climate-change implications | |
Ou, Hsien-Wang1,2 | |
2018 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:641-653 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We formulate a box model of coupled ocean-atmosphere to examine the differential fields interactive with the thermohaline circulation (THC) and their response to global warming. We discern a robust convective bound on the atmospheric heat transport, which would divide the climate regime into warm and cold branches; but unlike the saline mode of previous box models, the cold state, if allowed, has the same-signed-though weaker-density contrast and THC as the present climate, which may explain its emergence from coupled general circulation models. We underscore the nondeterminacy of the THC due to random eddy shedding and apply the fluctuation theorem to constrain the shedding rate, thus closing the problem. The derivation reveals an ocean propelled toward the maximum entropy production (MEP) on millennial timescale (termed "MEP-adjustment"), the long timescale arising from the compounding effect of microscopic fluctuations in the shedding rate and their slight probability bias. Global warming may induce hysteresis between the two branches, like that seen in GCMs, but the cold transition is far more sensitive to the moistening than the heating effects as the latter would be countered by the hydrological feedback. The uni- or bi-modality of the current state-hence whether the THC may recover after the cold transition-depends on the global-mean convective flux and may not be easily assessed due to its observed uncertainty. |
英文关键词 | Thermohaline circulation Fluctuation theorem Maximum entropy production Ocean hysteresis Global warming |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422908700040 |
WOS关键词 | MAXIMUM-ENTROPY PRODUCTION ; OCEAN-ATMOSPHERE SYSTEM ; FLUCTUATION THEOREM ; HYDROLOGICAL CYCLE ; ATLANTIC-OCEAN ; PART I ; MODEL ; SENSITIVITY ; FLUX ; TEMPERATURE |
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/35621 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Dept Earth & Environm Sci, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 2.100 Overlook Terrace,Apt 47, New York, NY 10040 USA |
推荐引用方式 GB/T 7714 | Ou, Hsien-Wang. Thermohaline circulation: a missing equation and its climate-change implications[J]. CLIMATE DYNAMICS,2018,50:641-653. |
APA | Ou, Hsien-Wang.(2018).Thermohaline circulation: a missing equation and its climate-change implications.CLIMATE DYNAMICS,50,641-653. |
MLA | Ou, Hsien-Wang."Thermohaline circulation: a missing equation and its climate-change implications".CLIMATE DYNAMICS 50(2018):641-653. |
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