An assessment of the subduction rate in the CMIP6 historical experiment

Shan Liu; Xueyi Jing; Xingrong Chen; Huijun Wang

doi:10.1007/s13131-022-2108-z

Volume 42 Issue 1

Jan. 2023

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Shan Liu, Xueyi Jing, Xingrong Chen, Huijun Wang. An assessment of the subduction rate in the CMIP6 historical experiment[J]. Acta Oceanologica Sinica, 2023, 42(1): 44-60. doi: 10.1007/s13131-022-2108-z

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Shan Liu, Xueyi Jing, Xingrong Chen, Huijun Wang. An assessment of the subduction rate in the CMIP6 historical experiment[J]. Acta Oceanologica Sinica, 2023, 42(1): 44-60. doi: 10.1007/s13131-022-2108-z

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An assessment of the subduction rate in the CMIP6 historical experiment

doi: 10.1007/s13131-022-2108-z

Shan Liu¹,
Xueyi Jing²,
Xingrong Chen^{1
,
,},
Huijun Wang^{3, 4}

1.
National Marine Environmental Forecasting Center, Ministry of Natural Resources, Beijing 100081, China
2.
National Supercomputing Center in Wuxi, Wuxi 214315, China
3.
Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China
4.
Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Funds: The National Natural Science Foundation of China under contract Nos 42192561 and 41605052; the National Key Research and Development Program of China under contract No. 2020YFA0608804.

More Information

Corresponding author: E-mail: luckychen@nmefc.cn
Received Date: 2022-07-01
Accepted Date: 2022-09-13

Available Online: 2022-12-21

Publish Date: 2023-01-25

Abstract

Abstract

Subduction process is a dynamical bridge for the exchanges of heat between the atmosphere and subsurface ocean water, which is regarded as a central proxy for the ocean climate studies. Given its key indicator in climate signals, it is of importance to examine the ability of a model to simulate the global subduction rate before investigating the climate dynamics. In this paper, we evaluated the ability of 21 climate models from Coupled Model Intercomparison Project Phase 6 (CMIP6) in simulating the subduction rate. In general, the simulation ability of the models to the subduction climatology is better than that to the long-term variation trend. Based on the comprehensive analysis of climatology distribution and long-term trend of the subduction rate, GISS-E2-1-G performs better in reproducing the subduction rate climatology and IPSL-CM6A-LR can simulate positive long-term trend for both the global mean subduction rate and the lateral induction term in the Antarctic Circumpolar Current (ACC) region. However, it is still challenging to capture both the distribution characteristics of the subduction climatology and the long-term temporal trend for the 21 CMIP6 models. In addition, the model results demonstrate that, the ACC area is the major region contributing to the long-term trend of the global mean subduction rate. The analysis in this paper indicates that the poor simulation ability of reproducing the long-term trend of global mean subduction rate might be attributed to the ocean dynamics, for example, the zonal velocity at the bottom mixed layer and zonal gradient of mixed layer depth.
- subduction rate,
- CMIP6,
- climatology,
- long-term trend

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References(39)

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