Effect of Ocean Thermal Diffusivity on Global Warming Induced by Increasing Atmospheric CO2

Bao Ning; Zhang Xuehong

doi:10.1007/BF02919265

Impact Factor: 5.8

Volume 8 Issue 4

Oct. 1991

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1991 > 8(4): 421-430

Effect of Ocean Thermal Diffusivity on Global Warming Induced by Increasing Atmospheric CO2

1.
Institute of Atmospheric Physics, Chinese Academy of Sciences, P. O. Box 2718, Beijing 100080, China,Institute of Atmospheric Physics, Chinese Academy of Sciences, P. O. Box 2718, Beijing 100080, China

doi: 10.1007/BF02919265

Abstract
References
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Abstract:
A global mean ocean model including atmospheric heating, heat capacity of the mixed layer ocean, and vertical thermal diffusivity in the lower ocean, proposed by Cess and Goldenberg (1981), is used in this paper to study the sen-sitivity of global warming to the vertical diffusivity. The results suggest that the behaviour of upper ocean tempera-ture is mainly determined by the magnitude of upper layer diffusivity and an ocean with a larger diffusivity leads to a less increase of sea surface temperature and a longer time delay for the global warming induced by increasing CO2 than that with smaller one. The global warming relative to four scenarios of CO2 emission assumed by Intergovernmental Panel of Climate Change (IPCC) is also estimated by using the model with two kinds of thermal diffusivities. The result shows that for various combinations of the CO2 emission scenarios and the diffusivities, the oceanic time delay to the global warming varies from 15 years to 70 years.
References

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Manuscript History

Manuscript received: 10 October 1991

Manuscript revised: 10 October 1991

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effect of Ocean Thermal Diffusivity on Global Warming Induced by Increasing Atmospheric CO2

1. Institute of Atmospheric Physics, Chinese Academy of Sciences, P. O. Box 2718, Beijing 100080, China,Institute of Atmospheric Physics, Chinese Academy of Sciences, P. O. Box 2718, Beijing 100080, China

Manuscript received: 1991-10-10
Manuscript revised: 1991-10-10

Abstract: A global mean ocean model including atmospheric heating, heat capacity of the mixed layer ocean, and vertical thermal diffusivity in the lower ocean, proposed by Cess and Goldenberg (1981), is used in this paper to study the sen-sitivity of global warming to the vertical diffusivity. The results suggest that the behaviour of upper ocean tempera-ture is mainly determined by the magnitude of upper layer diffusivity and an ocean with a larger diffusivity leads to a less increase of sea surface temperature and a longer time delay for the global warming induced by increasing CO2 than that with smaller one. The global warming relative to four scenarios of CO2 emission assumed by Intergovernmental Panel of Climate Change (IPCC) is also estimated by using the model with two kinds of thermal diffusivities. The result shows that for various combinations of the CO2 emission scenarios and the diffusivities, the oceanic time delay to the global warming varies from 15 years to 70 years.