气候变化领域集成服务门户(CCPortal): Explicit versus parameterized convection in response to the Atlantic meridional mode

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DOI	10.1175/JCLI-D-20-0224.1
	Explicit versus parameterized convection in response to the Atlantic meridional mode
	Paccini L.; Hohenegger C.; Stevens B.
发表日期	2021
ISSN	08948755
起始页码	3343
结束页码	3354
卷号	34 期号:9
英文摘要	This study investigates whether the representation of explicit and parameterized convection influences the response to the Atlantic meridional mode (AMM). The main focus is on the precipitation response to the AMM-SST pattern, but possible implications for the atmospheric feedback on SST are also examined by considering differences in the circulation response between explicit and parameterized convection. On the basis of analysis from observations, SST composites are built to represent the positive and negative AMM. These SST patterns, in addition to the March-May climatology, are prescribed to the atmospheric ICON model. High-resolution simulations with explicit convection (E-CON) and coarse-resolution simulations with parameterized convection (P-CON) are used over a nested tropical Atlantic Ocean domain and a global domain, respectively. Our results show that a meridional shift of about 18 in the precipitation climatology explains most of the response to the AMM-SST pattern in simulations both with explicit convection and with parameterized convection. Our results also indicate a linearity in the precipitation response to the positive and negative AMM in E-CON, in contrast to P-CON. Further analysis of the atmospheric response to the AMM reveals that anomalies in the wind-driven enthalpy fluxes are generally stronger in E-CON than in P-CON. This result suggests that SST anomalies would be amplified more strongly in coupled simulations using an explicit representation of convection. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmosphere-ocean interaction; Deep convection; Intertropical convergence zone
语种	英语
scopus关键词	Climatology; Composite structures; Parameterization; Atmospheric feedbacks; Atmospheric response; Coupled simulation; Enthalpy fluxes; Explicit representation; High resolution simulations; Precipitation climatology; Tropical atlantic; Oceanography
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178618
作者单位	Max Planck Institute for Meteorology, Hamburg, Germany
推荐引用方式 GB/T 7714	Paccini L.,Hohenegger C.,Stevens B.. Explicit versus parameterized convection in response to the Atlantic meridional mode[J],2021,34(9).
APA	Paccini L.,Hohenegger C.,&Stevens B..(2021).Explicit versus parameterized convection in response to the Atlantic meridional mode.Journal of Climate,34(9).
MLA	Paccini L.,et al."Explicit versus parameterized convection in response to the Atlantic meridional mode".Journal of Climate 34.9(2021).