气候变化领域集成服务门户(CCPortal): Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model

CCPortal

DOI	10.1007/s00382-018-4539-y
	Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model
	Hall N.M.J.; Leroux S.; Ambrizzi T.
发表日期	2019
ISSN	0930-7575
起始页码	6719
结束页码	6733
卷号	52 期号:11
英文摘要	The forcing of the global circulation is examined using a primitive equation model and a 38-year reanalysis dataset. One-timestep integrations are initialised with selected sets of initial conditions, and the forcing budget for the mean annual cycle is deduced. This budget consists of sources and sinks of momentum, temperature and humidity which are balanced by dynamical terms. The associated timescale interactions are examined in detail. The time-mean forcing is balanced by time-mean fluxes, annual cycle interactions and transient fluxes. The annual cycle of the forcing is balanced by the interaction of annual cycle anomalies with the time-mean flow and with themselves (this latter cycle-cycle interaction term is found to be important for the moisture supply over West Africa). Transient interactions on other timescales also contribute to the forcing of the annual cycle, but the interaction term between the annual cycle and other timescales is small, as is the storage term associated with seasonal tendencies. This objectively derived empirical forcing is then used to drive the dynamical model. The resulting simple GCM is called DREAM (Dynamical Research Empirical Atmospheric Model). This is the first time this approach has been used with an annual cycle. The systematic errors of DREAM compared to the reanalysis chiefly concern the momentum balance in the southern hemisphere jet. Perpetual season simulations are similar to individual seasons from the annual cycle run, consistent with the small seasonal tendency term in the forcing. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Annual Cycle; DREAM; Dynamical model; Simple GCM
语种	英语
scopus关键词	annual cycle; atmospheric circulation; atmospheric forcing; atmospheric general circulation model; atmospheric modeling; atmospheric moisture; data set; jet stream; numerical model; Southern Hemisphere; West Africa
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146256
作者单位	LEGOS, 14 Ave. Edouard Belin, Toulouse, 31400, France; OceanNext, MEOM, Grenoble, France; IAG, University of Sao Paulo, Sao Paulo, Brazil
推荐引用方式 GB/T 7714	Hall N.M.J.,Leroux S.,Ambrizzi T.. Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model[J],2019,52(11).
APA	Hall N.M.J.,Leroux S.,&Ambrizzi T..(2019).Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model.Climate Dynamics,52(11).
MLA	Hall N.M.J.,et al."Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model".Climate Dynamics 52.11(2019).