Asymmetric response of the eastern tropical Indian SST to climate warming and cooling

XU Shan; LUO Yiyong

doi:10.1007/s13131-019-1441-3

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Article Navigation > Acta Oceanologica Sinica > 2019 > 38(5): 76-85

XU Shan, LUO Yiyong. Asymmetric response of the eastern tropical Indian SST to climate warming and cooling[J]. Acta Oceanologica Sinica, 2019, 38(5): 76-85. doi: 10.1007/s13131-019-1441-3

Citation:

XU Shan, LUO Yiyong. Asymmetric response of the eastern tropical Indian SST to climate warming and cooling[J]. Acta Oceanologica Sinica, 2019, 38(5): 76-85. doi: 10.1007/s13131-019-1441-3

XU Shan, LUO Yiyong. Asymmetric response of the eastern tropical Indian SST to climate warming and cooling[J]. Acta Oceanologica Sinica, 2019, 38(5): 76-85. doi: 10.1007/s13131-019-1441-3

Citation:

XU Shan, LUO Yiyong. Asymmetric response of the eastern tropical Indian SST to climate warming and cooling[J]. Acta Oceanologica Sinica, 2019, 38(5): 76-85. doi: 10.1007/s13131-019-1441-3

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Asymmetric response of the eastern tropical Indian SST to climate warming and cooling

doi: 10.1007/s13131-019-1441-3

XU Shan¹,
LUO Yiyong^2
,

1.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China
2.
Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China

Received Date: 2018-01-25

Abstract

Abstract

The response of the eastern tropical Indian Ocean (ETIO) to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model (CESM). A significant positive asymmetry in sea surface temperature (SST) is found over the ETIO—the warming responses to the positive forcing exceeds the cooling to the negative forcing. A mixed layer heat budget analysis is carried out to identify the mechanisms responsible for the SST asymmetry. Results show that it is mainly ascribed to the ocean dynamical processes, including vertical advections and diffusion. The net surface heat flux, on the contrary, works to reduce the asymmetry through its shortwave radiation and latent heat flux components. The former is due to the nonlinear relationship between SST and cloud, while the latter is resulted mainly from Newtonian damping and air-sea stability effects. Changes in the SST skewness are also evaluated, with more enhanced negative SST skewness over the ETIO found for the cooling than heating scenarios due to the asymmetric thermocline-SST feedback.
- tropical Indian Ocean,
- SST asymmetry,
- climate warming,
- climate cooling,
- negative SST skewness

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References(28)

References

Ashok K, Guan Zhaoyong, Saji N H, et al. 2004. Individual and combined influences of ENSO and the Indian Ocean dipole on the Indian summer monsoon. Journal of Climate, 17(16):3141-3155, doi: 10.1175/1520-0442(2004)017<3141:IACIOE>2.0.CO;2

Behera S K, Luo Jingjia, Masson S, et al. 2005. Paramount impact of the Indian Ocean dipole on the east African short rains:A CGCM study. Journal of Climate, 18(21):4514-4530, doi: 10.1175/JCLI3541.1

Cai Wenju, Cowan T, Raupach M. 2009. Positive Indian ocean dipole events precondition southeast Australia bushfires. Geophysical Research Letters, 36(19):L19710, doi: 10.1029/2009GL039902

Cai Wenju, Qiu Yun. 2013. An observation-based assessment of nonlinear feedback processes associated with the Indian Ocean dipole. Journal of Climate, 26(9):2880-2890, doi: 10.1175/JCLI-D-12-00483.1

Cai Wenju, Santoso A, Wang Guojian, et al. 2014. Increased frequency of extreme Indian Ocean dipole events due to greenhouse warming. Nature, 510(7504):254-258, doi: 10.1038/nature13327

Chan S C, Behera S K, Yamagata T. 2008. Indian Ocean dipole influence on south American rainfall. Geophysical Research Letters, 35(14):L14S12

Cowan T, Cai Wenju, Ng B, et al. 2014. The response of the Indian Ocean dipole asymmetry to anthropogenic aerosols and greenhouse gases. Journal of Climate, 28(7):2564-2583

Dong Lu, Zhou Tianjun. 2014. The Indian Ocean sea surface temperature warming simulated by CMIP5 models during the Twentieth Century:competing forcing roles of GHGs and anthropogenic aerosols. Journal of Climate, 27(9):3348-3362, doi: 10.1175/JCLI-D-13-00396.1

Du, Yan, Xie Shangping. 2008. Role of atmospheric adjustments in the tropical Indian Ocean warming during the 20th century in climate models. Geophysical Research Letters, 35(8):L08712

Hong C C, Li T. 2010. Independence of SST skewness from thermocline feedback in the eastern equatorial Indian Ocean. Geophysical Research Letters, 37(11):L11702

Hong C C, Li T, Ho Lin, et al. 2008. Asymmetry of the Indian Ocean dipole. Part I:Observational analysis. Journal of Climate, 21(18):4834-4848, doi: 10.1175/2008JCLI2222.1

Hong C C, Li T, Luo Jingjia. 2010. Asymmetry of the Indian Ocean dipole. Part Ⅱ:Model diagnosis. Journal of Climate, 21(18):4849-4858

Huang Gang, Hu Kaiming, Qu Xia, et al. 2016. A Review about indian ocean basin mode and its impacts on East Asian summer climate. Chinese Journal of Atmospheric Sciences (in Chinese), 40(1):121-130

Li Zhi, Luo Yiyong. 2018. Response of the tropical Indian Ocean to greenhouse gases and aerosol forcing in the GFDL CM3 coupled climate model. Atmosphere-Ocean, 56(1):40-54, doi: 10.1080/07055900.2018.1427040

Liu Lin, Xie Shangping, Zheng Xiaotong, et al. 2014. Indian Ocean variability in the CMIP5 multi-model ensemble:the zonal dipole mode. Climate Dynamics, 43(5-6):1715-1730

Liu Fukai, Luo Yiyong, Lu Jian, et al. 2017. Asymmetric response of the equatorial Pacific SST to climate warming and cooling. Journal of Climate, 30(18):7255-7270, doi: 10.1175/JCLI-D-17-0011.1

Luo Yiyong, Lu Jian, Liu Fukai, et al. 2015. Understanding the El Niño-like oceanic response in the tropical Pacific to global warming. Climate Dynamics, 45(7-8):1945-1964

Luo Yiyong, Lu Jian, Liu Fukai, et al. 2016. The positive Indian ocean dipole-like response in the tropical Indian Ocean to global warming. Advances in Atmospheric Sciences, 33(4):476-488, doi: 10.1007/s00376-015-5027-5

Luo Yiyong, Lu Jian, Liu Fukai, et al. 2017. The role of ocean dynamical thermostat in delaying the El Nino-like response over the equatorial Pacific to climate warming. Journal of Climate, 30(8):2811-2827, doi: 10.1175/JCLI-D-16-0454.1

Ng B, Cai Wenju, Walsh K. 2014a. Nonlinear feedbacks associated with the Indian ocean dipole and their response to global warming in the GFDL-ESM2M coupled climate model. Journal of Climate, 27(11):3904-3919, doi: 10.1175/JCLI-D-13-00527.1

Ng B, Cai Wenju, Walsh K. 2014b. The role of the SST-thermocline relationship in Indian Ocean Dipole skewness and its response to global warming. Scientific Reports, 4:6034

Ogata T, Xie Shangping, Lan Jian, et al. 2013. Importance of ocean dynamics for the skewness of the Indian Ocean dipole mode. Journal of Climate, 26(7):2145-2159, doi: 10.1175/JCLI-D-11-00615.1

Saji N H, Goswami B N, Vinayachandran P N, et al. 1999. A dipole mode in the tropical Indian Ocean. Nature, 401(6751):360-363

Saji N H, Yamagata T. 2003. Possible impacts of Indian Ocean dipole mode events on global climate. Climate Research, 25(2):151-169

Stevenson J W, Niiler P P. 1983. Upper Ocean heat budget during the Hawaii-to-Tahiti shuttle experiment. Journal of Physical Oceanography, 13(10):1894-1907, doi: 10.1175/1520-0485(1983)013<1894:UOHBDT>2.0.CO;2

Webster P J, Moore A M, Loschnigg J P, et al. 1999. Coupled ocean-atmosphere dynamics in the Indian Ocean during 1997-98. Nature, 401(6751):356-360, doi: 10.1038/43848

Zheng Xiaotong, Xie Shangping, Du Yan, et al. 2013. Indian Ocean dipole response to global warming in the CMIP5 multimodel ensemble. Journal of Climate, 26(16):6067-6080, doi: 10.1175/JCLI-D-12-00638.1

Zheng Xiaotong, Xie Shangping, Vecchi G A, et al. 2010. Indian Ocean dipole response to global warming:Analysis of ocean-atmospheric feedbacks in a coupled model. Journal of Climate, 23(5):1240-1253, doi: 10.1175/2009JCLI3326.1

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