GSTDTAP  > 气候变化
DOI10.1007/s00382-018-4539-y
Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model
Hall, Nicholas M. J.1; Leroux, Stephanie2; Ambrizzi, Tercio3
2019-06-01
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号52期号:11页码:6719-6733
文章类型Article
语种英语
国家France; Brazil
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.


英文关键词Annual Cycle Dynamical model DREAM Simple GCM
领域气候变化
收录类别SCI-E
WOS记录号WOS:000469016700024
WOS关键词AFRICAN EASTERLY WAVES ; 3-DIMENSIONAL STRUCTURE ; ENERGY BUDGET ; PART II ; DYNAMICS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/183479
专题气候变化
作者单位1.LEGOS, 14 Ave Edouard Belin, F-31400 Toulouse, France;
2.OceanNext, MEOM, Grenoble, France;
3.Univ Sao Paulo, IAG, Sao Paulo, Brazil
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Hall, Nicholas M. J.,Leroux, Stephanie,Ambrizzi, Tercio. Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model[J]. CLIMATE DYNAMICS,2019,52(11):6719-6733.
APA Hall, Nicholas M. J.,Leroux, Stephanie,&Ambrizzi, Tercio.(2019).Transient contributions to the forcing of the atmospheric annual cycle: A diagnostic study with the DREAM model.CLIMATE DYNAMICS,52(11),6719-6733.
MLA Hall, Nicholas 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):6719-6733.
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