Simulated contribution of the interdecadal Pacific oscillation to the west Eurasia cooling in 1998–2013

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2022-08-30
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Suo, Lingling
 Gastineau, Guillaume
 Gao, Yongqi
 Liang, Yu-Chiao
 Ghosh, Rohit
 Tian, Tian
 Zhang, Ying
 Kwon, Young-Oh
 Otterå, Odd Helge
 Yang, Shuting
 Matei, Daniela
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Suo_2022_Environ._Res._Lett._17_094021.pdf (15.21 MB)
erlac88e5supp1.pdf (541.29 KB)
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https://hdl.handle.net/1912/29754
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https://doi.org/10.1088/1748-9326/ac88e5
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10.1088/1748-9326/ac88e5
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Abstract
Large ensemble simulations with six atmospheric general circulation models involved are utilized to verify the interdecadal Pacific oscillation (IPO) impacts on the trend of Eurasian winter surface air temperatures (SAT) during 1998–2013, a period characterized by the prominent Eurasia cooling (EC). In our simulations, IPO brings a cooling trend over west-central Eurasia in 1998–2013, about a quarter of the observed EC in that area. The cooling is associated with the phase transition of the IPO to a strong negative. However, the standard deviation of the area-averaged SAT trends in the west EC region among ensembles, driven by internal variability intrinsic due to the atmosphere and land, is more than three times the isolated IPO impacts, which can shadow the modulation of the IPO on the west Eurasia winter climate.
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© The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Suo, L., Gastineau, G., Gao, Y., Liang, Y.-C., Ghosh, R., Tian, T., Zhang, Y., Kwon, Y.-O., Otterå, O., Yang, S., & Matei, D. Simulated contribution of the interdecadal Pacific oscillation to the west Eurasia cooling in 1998–2013. Environmental Research Letters, 17(9), (2022): 094021, https://doi.org/10.1088/1748-9326/ac88e5.
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Suo, L., Gastineau, G., Gao, Y., Liang, Y.-C., Ghosh, R., Tian, T., Zhang, Y., Kwon, Y.-O., Otterå, O., Yang, S., & Matei, D. (2022). Simulated contribution of the interdecadal Pacific oscillation to the west Eurasia cooling in 1998–2013. Environmental Research Letters, 17(9), 094021.
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