Variability of atlantic meridional overturning circulation in FGOALS-g2

Wenyu Huang; Bin Wang; Lijuan Li; Li Dong; Pengfei Lin; Yongqiang Yu; Tianjun Zhou; Li Liu; Shiming Xu; Kun Xia; Ye Pu; Lu Wang; Mimi Liu; Si Shen; Ning Hu; Yong Wang; Wenqi Sun; Fang Dong

doi:10.1007/s00376-013-2155-7

Variability of atlantic meridional overturning circulation in FGOALS-g2

Wenyu Huang
, Bin Wang
, Lijuan Li
, Li Dong
, Pengfei Lin
, Yongqiang Yu
, Tianjun Zhou
, Li Liu
, Shiming Xu
, Kun Xia
, Ye Pu
, Lu Wang
, Mimi Liu
, Si Shen
, Ning Hu
, Yong Wang
, Wenqi Sun
, Fang Dong

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The variability of Atlantic Meridional Overturning Circulation (AMOC) in the pre-industrial control experiment of the Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 (FGOALS-g2) was investigated using the model outputs with the most stable state in a 512-yr time window from the total 1500-yr period of the experiment. The period of AMOC in FGOALS-g2 is double peaked at 20 and 32 years according to the power spectrum, and 22 years according to an auto-correlation analysis, which shows very obvious decadal variability. Like many other coupled climate models, the decadal variability of AMOC in FGOALS-g2 is closely related to the convection that occurs in the Labrador Sea region. Deep convection in the Labrador Sea in FGOALS-g2 leads the AMOC maximum by 3-4 years. The contributions of thermal and haline effects to the variability of the convection in three different regions [the Labrador, Irminger and Greenland-Iceland-Norwegian (GIN) Seas] were analyzed for FGOALS-g2. The variability of convection in the Labrador and Irminger Seas is thermally dominant, while that in the colder GIN Seas can be mainly attributed to salinity changes due to the lower thermal expansion. By comparing the simulation results from FGOALS-g2 and 11 other models, it was found that AMOC variability can be attributed to salinity changes for longer periods (longer than 35 years) and to temperature changes for shorter periods.

Original language	English
Pages (from-to)	95-109
Number of pages	15
Journal	Advances in Atmospheric Sciences
Volume	31
Issue number	1
DOIs	https://doi.org/10.1007/s00376-013-2155-7
State	Published - Jan 2014
Externally published	Yes

Funding

anonymous reviewers for their valuable comments, which led to the present improved version of the original manuscript. A discussion with ZHANG Xuehong and LIU Hailong was extremely helpful. This work was supported by the Ministry of Science and Technology of China for the National High-tech R&D Program (863 Program; Grant No. 2010AA012304), the National Basic Research Program of China (973 Program; Grant Nos. 2011CB309704 and 2010CB951904), and the National Natural Science Foundation of China (Grant Nos. 41023002 and 41005053).

Keywords

AMOC
FGOALS-g2
decadal variability
deep convection

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10.1007/s00376-013-2155-7

Cite this

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title = "Variability of atlantic meridional overturning circulation in FGOALS-g2",

abstract = "The variability of Atlantic Meridional Overturning Circulation (AMOC) in the pre-industrial control experiment of the Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 (FGOALS-g2) was investigated using the model outputs with the most stable state in a 512-yr time window from the total 1500-yr period of the experiment. The period of AMOC in FGOALS-g2 is double peaked at 20 and 32 years according to the power spectrum, and 22 years according to an auto-correlation analysis, which shows very obvious decadal variability. Like many other coupled climate models, the decadal variability of AMOC in FGOALS-g2 is closely related to the convection that occurs in the Labrador Sea region. Deep convection in the Labrador Sea in FGOALS-g2 leads the AMOC maximum by 3-4 years. The contributions of thermal and haline effects to the variability of the convection in three different regions [the Labrador, Irminger and Greenland-Iceland-Norwegian (GIN) Seas] were analyzed for FGOALS-g2. The variability of convection in the Labrador and Irminger Seas is thermally dominant, while that in the colder GIN Seas can be mainly attributed to salinity changes due to the lower thermal expansion. By comparing the simulation results from FGOALS-g2 and 11 other models, it was found that AMOC variability can be attributed to salinity changes for longer periods (longer than 35 years) and to temperature changes for shorter periods.",

keywords = "AMOC, FGOALS-g2, decadal variability, deep convection",

author = "Wenyu Huang and Bin Wang and Lijuan Li and Li Dong and Pengfei Lin and Yongqiang Yu and Tianjun Zhou and Li Liu and Shiming Xu and Kun Xia and Ye Pu and Lu Wang and Mimi Liu and Si Shen and Ning Hu and Yong Wang and Wenqi Sun and Fang Dong",

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AU - Huang, Wenyu

AU - Wang, Bin

AU - Li, Lijuan

AU - Dong, Li

AU - Lin, Pengfei

AU - Yu, Yongqiang

AU - Zhou, Tianjun

AU - Liu, Li

AU - Xu, Shiming

AU - Xia, Kun

AU - Pu, Ye

AU - Wang, Lu

AU - Liu, Mimi

AU - Shen, Si

AU - Hu, Ning

AU - Wang, Yong

AU - Sun, Wenqi

AU - Dong, Fang

PY - 2014/1

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N2 - The variability of Atlantic Meridional Overturning Circulation (AMOC) in the pre-industrial control experiment of the Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 (FGOALS-g2) was investigated using the model outputs with the most stable state in a 512-yr time window from the total 1500-yr period of the experiment. The period of AMOC in FGOALS-g2 is double peaked at 20 and 32 years according to the power spectrum, and 22 years according to an auto-correlation analysis, which shows very obvious decadal variability. Like many other coupled climate models, the decadal variability of AMOC in FGOALS-g2 is closely related to the convection that occurs in the Labrador Sea region. Deep convection in the Labrador Sea in FGOALS-g2 leads the AMOC maximum by 3-4 years. The contributions of thermal and haline effects to the variability of the convection in three different regions [the Labrador, Irminger and Greenland-Iceland-Norwegian (GIN) Seas] were analyzed for FGOALS-g2. The variability of convection in the Labrador and Irminger Seas is thermally dominant, while that in the colder GIN Seas can be mainly attributed to salinity changes due to the lower thermal expansion. By comparing the simulation results from FGOALS-g2 and 11 other models, it was found that AMOC variability can be attributed to salinity changes for longer periods (longer than 35 years) and to temperature changes for shorter periods.

AB - The variability of Atlantic Meridional Overturning Circulation (AMOC) in the pre-industrial control experiment of the Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 (FGOALS-g2) was investigated using the model outputs with the most stable state in a 512-yr time window from the total 1500-yr period of the experiment. The period of AMOC in FGOALS-g2 is double peaked at 20 and 32 years according to the power spectrum, and 22 years according to an auto-correlation analysis, which shows very obvious decadal variability. Like many other coupled climate models, the decadal variability of AMOC in FGOALS-g2 is closely related to the convection that occurs in the Labrador Sea region. Deep convection in the Labrador Sea in FGOALS-g2 leads the AMOC maximum by 3-4 years. The contributions of thermal and haline effects to the variability of the convection in three different regions [the Labrador, Irminger and Greenland-Iceland-Norwegian (GIN) Seas] were analyzed for FGOALS-g2. The variability of convection in the Labrador and Irminger Seas is thermally dominant, while that in the colder GIN Seas can be mainly attributed to salinity changes due to the lower thermal expansion. By comparing the simulation results from FGOALS-g2 and 11 other models, it was found that AMOC variability can be attributed to salinity changes for longer periods (longer than 35 years) and to temperature changes for shorter periods.

KW - AMOC

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KW - decadal variability

KW - deep convection

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M3 - Article

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VL - 31

SP - 95

EP - 109

JO - Advances in Atmospheric Sciences

JF - Advances in Atmospheric Sciences

IS - 1

ER -

Variability of atlantic meridional overturning circulation in FGOALS-g2

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Keywords

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