North Atlantic subtropical mode water formation controlled by Gulf Stream fronts
作者机构：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
出 版 物：《National Science Review》 (国家科学评论(英文版))
年 卷 期：2023年第10卷第9期
页 面：214-223页
核心收录：
基 金：supported by the National Natural Science Foundation of China (42276016, 92258302 and 41922039) the Science and Technology Innovation Foundation of Laoshan Laboratory (LSKJ202202602 and LSKJ202202402) the National Key Research and Development Program of China(2019YFA0607001 and 2020YFA0608801) the Qingdao Post-Doctoral Grant (QDBSH20220202119) the Youth Innovation Promotion Association of the Chinese Academy of Sciences(2021205)
主 题：North Atlantic subtropical mode water Gulf Stream thermal fronts frontal-scale ocean-to-atmosphere feedback eddy-resolving coupled global climate model
摘 要：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.
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