The impact of oceanic processes on the transient climate response: a tidal forcing experiment

Yi Yu; Hailong Liu; Pengfei Lin; Jian Lan

doi:10.1007/s13131-019-1466-0

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Yi Yu, Hailong Liu, Pengfei Lin, Jian Lan. The impact of oceanic processes on the transient climate response: a tidal forcing experiment[J]. Acta Oceanologica Sinica, 2020, 39(1): 52-62. doi: 10.1007/s13131-019-1466-0

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Yi Yu, Hailong Liu, Pengfei Lin, Jian Lan. The impact of oceanic processes on the transient climate response: a tidal forcing experiment[J]. Acta Oceanologica Sinica, 2020, 39(1): 52-62. doi: 10.1007/s13131-019-1466-0

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The impact of oceanic processes on the transient climate response: a tidal forcing experiment

doi: 10.1007/s13131-019-1466-0

Yi Yu^{1, 3},
Hailong Liu^{2, 4, 6
,
,},
Pengfei Lin^{2, 4},
Jian Lan⁵

1.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 510275, China
2.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
4.
College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
5.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266003, China
6.
Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China

Funds: The National Key Research and Development Program for Developing Basic Sciences under contract Nos 2016YFC1401401 and 2016YFC1401601; the “Strategic Priority Research Program” of the Chinese Academy of Sciences under contract Nos XDA11010304, XDA05110302 and XDC01040100; the National Natural Science Foundation of China under contract Nos 41576026, 41576025, 41776030 and 41931183.

More Information

Corresponding author: E-mail: lhl@lasg.iap.ac.cn
Received Date: 2018-10-28
Accepted Date: 2019-04-15

Available Online: 2020-04-21

Publish Date: 2020-01-20

Abstract

Abstract

In this study, the impact of oceanic processes on the sensitivity of transient climate change is investigated using two sets of coupled experiments with and without tidal forcing, which are termed Exp_Tide and Exp_Control, respectively. After introducing tidal forcing, the transient climate response (TCR) decreases from 2.32 K to 1.90 K, and the surface air temperature warming at high latitudes decreases by 29%. Large ocean heat uptake efficiency and heat storage can explain the low TCR in Exp_Tide. Approximately 21% more heat is stored in the ocean in Exp_Tide (1.10×10²⁴J) than in Exp_Control (0.91×10²⁴J). Most of the large ocean warming occurs in the upper 1 000 m between 60°S and 60°N, primarily in the Atlantic and Southern Oceans. This ocean warming is closely related to the Atlantic Meridional Overturning Circulation (AMOC). The initial transport at mid- and high latitudes and the decline in the AMOC observed in Exp_Tide are both larger than those observed in Exp_Control. The spatial structures of AMOC are also different with and without tidal forcing in present experiments. The AMOC in Exp_Tide has a large northward extension. We also investigated the relationship between AMOC and TCR suggested by previous studies using the present experiments.
- tidal forcing,
- transient climate response,
- ocean heat uptake,
- Atlantic Meridional Overturning Circulation

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References(47)

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