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Possible Origins of the Western Pacific Warm Pool Decadal Variability

Advances in Atmospheric Sciences 2012年第1期29卷 169-176页

作者： gan bolan WU Lixin Physical Oceanography Laboratory Ocean University of China Qingdao 266100

In this study, the impacts of the Pacific Decadal Oscillation （PDO） and the Atlantic Multidecadal Oscillation （AMO） on the western Pacific warm pool （WPWP） were investigated. Our results show that the WPWP is linked with the PDO and the AMO at multiple time scales. On the seasonal time scales, the WPWP and the PDO/AMO reinforce each other, while at decadal time scales the forcing roles of the PDO and the AMO dominate. Notably, a positive PDO tends to enlarge the WPWP at both seasonal and decadal time scales, while a positive AMO tends to reduce the WPWP at decadal time scales. Furthermore, the decadal variability of the WPWP can be well predicted based on the PDO and AMO.

关键词： decadal variability western Pacific warm pool Pacific decadal oscillation Atlantic multi-decadal oscillation

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Response of the North Pacific Oscillation to global warming in the models of the Intergovernmental Panel on Climate Change Fourth Assessment Report

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Journal of Oceanology and Limnology 2018年第3期36卷 601-611页

作者： CHEN Zheng gan bolan WU Lixin Physical Oceanography Laboratory/CIMST Ocean University of Chinaand Qingdao National Laboratory for Marine Science and TechnologyQingdao 266003China

Based on 22 of the climate models from phase 3 of the Coupled Model Intercomparison Project, we investigate the ability of the models to reproduce the spatiotemporal features of the wintertime North Pacific Oscillation(NPO), which is the second most important factor determining the wintertime sea level pressure field in simulations of the pre-industrial control climate, and evaluate the NPO response to the future most reasonable global warming scenario(the A1B scenario). We reveal that while most models simulate the geographic distribution and amplitude of the NPO pattern satisfactorily, only 13 models capture both features well. However, the temporal variability of the simulated NPO could not be significantly correlated with the observations. Further analysis indicates the weakened NPO intensity for a scenario of strong global warming is attributable to the reduced lower-tropospheric baroclinicity at mid-latitudes, which is anticipated to disrupt large-scale and low-frequency atmospheric variability, resulting in the diminished transfer of energy to the NPO, together with its northward shift.

关键词： North Pacific Oscillation(NPO) greenhouse gas warming CMIP3 climate models atmospheric baroclinicity climate change empirical orthogonal function

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Concrete-like high sulfur content cathodes with enhanced electrochemical performance for lithium-sulfur batteries

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Journal of Energy Chemistry 2020年第3期29卷 174-179页

作者： bolan gan Kaikai Tang Yali Chen Dandan Wang Na Wang Wenxian Li Yong Wang Hao Liu Guoxiu Wang Joint International Laboratory on Environmental and Energy Frontier Materials School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyBroadwaySydneyNSW 2007Australia

Nowadays,lithium-sulfur batteries have attracted numerous attention due to their high specific capacity,high energy density,low cost and environmental ***,there are some critical challenges to be overcome such as low electronic conductivity and capacity fading caused by shuttle *** attempts have been conducted to improve the electrochemical performance by designing effective sulfur *** this paper,we synthesize a concrete-like sulfur/carbon cathode with high sulfur content(84%)by using 3D macroporous hosts with high pore *** strategies of using polarized carbon framework and polymer coating are applied to synergistically control the dissolution of polysulfides so that the capacity retention and high rate performance can be remarkably *** a result,the composite exhibits a specific discharge capacity of 820 mAhg-1at a discharge current of 800 mAg-1(approximate to 0.5 C)after 100 cycles,calculated on the integrated mass of composite,which is superior to most report results.

关键词： Lithium-sulfur batteries Cathode Polymer coating N-doping

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North Atlantic subtropical mode water formation controlled by Gulf Stream fronts

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National Science Review 2023年第9期10卷 214-223页

作者： bolan gan Jingjie Yu Lixin Wu Gokhan Danabasoglu R.Justin Small Allison H.Baker Fan Jia Zhao Jing Xiaohui Ma Haiyuan Yang Zhaohui Chen Frontier Science Center for Deep Ocean Multispheres and Earth System(FDOMES) and Physical Oceanography Laboratory Ocean University of China 2. Laoshan Laboratory National Center for Atmospheric Research CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences

The North Atlantic Ocean hosts the largest volume of global subtropical mode waters(STMWs) in the world,which serve as heat,carbon and oxygen silos in the ocean *** are formed in the Gulf Stream region where thermal fronts are pervasive and result in feedback with the ***,their roles in STMW formation have been *** eddy-resolving global climate simulations,we find that suppressing local frontal-scale ocean-to-atmosphere(FOA) feedback leads to STMW formation being reduced almost by *** is because FOA feedback enlarges STMW outcropping,attributable to the mixed layer deepening associated with cumulative excessive latent heat loss due to higher wind speeds and greater air-sea humidity contrast driven by the Gulf Stream *** enhanced heat loss overshadows the stronger restratification induced by vertical eddies and turbulent heat transport,making STMW colder and he *** more realistic representation of FOA feedback,the eddy-present/rich coupled global climate models reproduce the observed STMWs much better than the eddy-free *** improvement in STMW production cannot be achieved,even with the oceanic resolution solely refined but without coupling to the overlying atmosphere in oceanic general circulation *** findings highlight the need to resolve FOA feedback to ameliorate the common severe underestimation of STMW and associated heat and carbon uptakes in earth system mo dels.

关键词： North Atlantic subtropical mode water Gulf Stream thermal fronts frontal-scale ocean-to-atmosphere feedback eddy-resolving coupled global climate model

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