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contributor authorWenjuan Huo
contributor authorZiniu Xiao
contributor authorLiang Zhao
date accessioned2023-04-12T18:43:38Z
date available2023-04-12T18:43:38Z
date copyright2022/12/22
date issued2022
identifier otherJCLI-D-21-0595.1.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4290135
description abstractAs an important external forcing, the effect of the 11-yr solar cycle on the tropical Pacific decadal variability is an interesting question. Here, we systematically investigate the phase-locking of the atmosphere and ocean covariations to the solar cycle in the tropical Pacific and propose a new mechanism to explain these decadal covariations. In both observation/reanalysis datasets and a solar cycle forced sensitivity experiment (named the SOL experiment), the ocean heat content anomalies (OHCa; 300 m) resemble a La Niña–like pattern in the solar cycle ascending phase, and the Walker circulation shifts westward. In the declining phase, the opposite is true. The accumulative solar irradiation directly contributes to this coherent decadal variability via changing the warm water volume and the solar-related heat is redistributed by the ocean dynamic processes. During the 11-yr solar cycle, the Pacific Walker circulation anomalies maintain the OHCa in the western equatorial Pacific and work as negative feedback for the eastern Pacific to help the OHCa phase transition. In addition, oceanic meridional heat transport via the subtropical cells and the propagation of off-equatorial Rossby waves also provide a lagged negative feedback to the OHCa phase transition according to the 11-yr solar cycle. The decadal coupled responses of the tropical Pacific climate system are 2 years more lag in the SOL experiment than in the observation/reanalysis.
publisherAmerican Meteorological Society
titlePhase-Locked Impact of the 11-Year Solar Cycle on Tropical Pacific Decadal Variability
typeJournal Paper
journal volume36
journal issue2
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-21-0595.1
journal fristpage421
journal lastpage439
page421–439
treeJournal of Climate:;2022:;volume( 036 ):;issue: 002
contenttypeFulltext


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